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New mobile apps from the Chinese artificial intelligence (AI) company DeepSeek have remained among the top three “free” downloads for Apple and Google devices since their debut on Jan. 25, 2025. But experts caution that many of DeepSeek’s design choices — such as using hard-coded encryption keys, and sending unencrypted user and device data to Chinese companies — introduce a number of glaring security and privacy risks.
Public interest in the DeepSeek AI chat apps swelled following widespread media reports that the upstart Chinese AI firm had managed to match the abilities of cutting-edge chatbots while using a fraction of the specialized computer chips that leading AI companies rely on. As of this writing, DeepSeek is the third most-downloaded “free” app on the Apple store, and #1 on Google Play.
DeepSeek’s rapid rise caught the attention of the mobile security firm NowSecure, a Chicago-based company that helps clients screen mobile apps for security and privacy threats. In a teardown of the DeepSeek app published today, NowSecure urged organizations to remove the DeepSeek iOS mobile app from their environments, citing security concerns.
NowSecure founder Andrew Hoog said they haven’t yet concluded an in-depth analysis of the DeepSeek app for Android devices, but that there is little reason to believe its basic design would be functionally much different.
Hoog told KrebsOnSecurity there were a number of qualities about the DeepSeek iOS app that suggest the presence of deep-seated security and privacy risks. For starters, he said, the app collects an awful lot of data about the user’s device.
“They are doing some very interesting things that are on the edge of advanced device fingerprinting,” Hoog said, noting that one property of the app tracks the device’s name — which for many iOS devices defaults to the customer’s name followed by the type of iOS device.
The device information shared, combined with the user’s Internet address and data gathered from mobile advertising companies, could be used to deanonymize users of the DeepSeek iOS app, NowSecure warned. The report notes that DeepSeek communicates with Volcengine, a cloud platform developed by ByteDance (the makers of TikTok), although NowSecure said it wasn’t clear if the data is just leveraging ByteDance’s digital transformation cloud service or if the declared information share extends further between the two companies.
Image: NowSecure.
Perhaps more concerning, NowSecure said the iOS app transmits device information “in the clear,” without any encryption to encapsulate the data. This means the data being handled by the app could be intercepted, read, and even modified by anyone who has access to any of the networks that carry the app’s traffic.
“The DeepSeek iOS app globally disables App Transport Security (ATS) which is an iOS platform level protection that prevents sensitive data from being sent over unencrypted channels,” the report observed. “Since this protection is disabled, the app can (and does) send unencrypted data over the internet.”
Hoog said the app does selectively encrypt portions of the responses coming from DeepSeek servers. But they also found it uses an insecure and now deprecated encryption algorithm called 3DES (aka Triple DES), and that the developers had hard-coded the encryption key. That means the cryptographic key needed to decipher those data fields can be extracted from the app itself.
There were other, less alarming security and privacy issues highlighted in the report, but Hoog said he’s confident there are additional, unseen security concerns lurking within the app’s code.
“When we see people exhibit really simplistic coding errors, as you dig deeper there are usually a lot more issues,” Hoog said. “There is virtually no priority around security or privacy. Whether cultural, or mandated by China, or a witting choice, taken together they point to significant lapse in security and privacy controls, and that puts companies at risk.”
Apparently, plenty of others share this view. Axios reported on January 30 that U.S. congressional offices are being warned not to use the app.
“[T]hreat actors are already exploiting DeepSeek to deliver malicious software and infect devices,” read the notice from the chief administrative officer for the House of Representatives. “To mitigate these risks, the House has taken security measures to restrict DeepSeek’s functionality on all House-issued devices.”
TechCrunch reports that Italy and Taiwan have already moved to ban DeepSeek over security concerns. Bloomberg writes that The Pentagon has blocked access to DeepSeek. CNBC says NASA also banned employees from using the service, as did the U.S. Navy.
Beyond security concerns tied to the DeepSeek iOS app, there are indications the Chinese AI company may be playing fast and loose with the data that it collects from and about users. On January 29, researchers at Wiz said they discovered a publicly accessible database linked to DeepSeek that exposed “a significant volume of chat history, backend data and sensitive information, including log streams, API secrets, and operational details.”
“More critically, the exposure allowed for full database control and potential privilege escalation within the DeepSeek environment, without any authentication or defense mechanism to the outside world,” Wiz wrote. [Full disclosure: Wiz is currently an advertiser on this website.]
KrebsOnSecurity sought comment on the report from DeepSeek and from Apple. This story will be updated with any substantive replies.
Scary movies are great. Scary mobile threats, not so much.
Ghosts, killer clowns, and the creatures can stir up all sorts of heebie-jeebies. The fun kind. Yet mobile threats like spyware, living dead apps, and botnets can conjure up all kinds of trouble.
Let’s get a rundown on the top mobile threats — then look at how you can banish them from your phone.
“I Know What You Did Because of Spyware”
Spyware is a type of malware that lurks in the shadows of your trusted device, collecting information around your browsing habits, personal information and more. Your private information is then sent to third parties, without your knowledge. Spooky stuff.
“Dawn of the Dead Apps”
Think haunted graveyards only exist in horror movies? Think again! Old apps lying dormant on your phones are like app graveyards, Many of these older apps may no longer be supported by Google or Apple stores. Lying there un-updated, these apps might harbor vulnerabilities. And that can infect your device with malware or leak your data to a third party.
“Bone Chilling Botnets”
Think “Invasion of the Body Snatchers,” but on your mobile device. What is a botnet you ask? When malware infiltrates a mobile device (like through a sketchy app) the device becomes a “bot.” This bot becomes one in an army of thousands of infected internet-connected devices. From there, they spread viruses, generate spam, and commit sorts of cybercrime. Most mobile device users aren’t even aware that their gadgets are compromised, which is why protecting your device before an attack is so important.
“Malicious Click or Treat”
Clicking links and mobile devices go together like Frankenstein and his bride. Which is why ad and click fraud through mobile devices is becoming more prevalent for cybercriminals. Whether through a phishing campaign or malicious apps, hackers can gain access to your device and your private information. Always remember to click with caution.
“IoT Follows”
The Internet of Things (IoT) has quickly become a staple in our everyday lives, and hackers are always ready to target easy prey. Most IoT devices connect to mobile devices, so if a hacker can gain access to your smartphone, they can infiltrate your connected devices as well. Or vice versa.
1) Avoid third-party app stores. Unlike Google Play and Apple’s App Store, which have measures in place to review and vet apps to help ensure that they are safe and secure, third-party sites may very well not. Further, some third-party sites may intentionally host malicious apps as part of a broader scam.
Granted, hackers have found ways to work around Google and Apple’s review process, yet the chances of downloading a safe app from them are far greater than anywhere else. Further, both Google and Apple are quick to remove malicious apps once discovered, making their stores that much safer.
2) Review with a critical eye. As with so many attacks, hackers rely on people clicking links or tapping “download” without a second thought. Before you download, take time to do some quick research. That may uncover some signs that the app is malicious. Check out the developer—have they published several other apps with many downloads and good reviews? A legit app typically has quite a few reviews, whereas malicious apps may have only a handful of (phony) five-star reviews.
Lastly, look for typos and poor grammar in both the app description and screenshots. They could be a sign that a hacker slapped the app together and quickly deployed it.
3) Go with a strong recommendation. Yet better than combing through user reviews yourself is getting a recommendation from a trusted source, like a well-known publication or from app store editors themselves. In this case, much of the vetting work has been done for you by an established reviewer. A quick online search like “best fitness apps” or “best apps for travelers” should turn up articles from legitimate sites that can suggest good options and describe them in detail before you download.
4) Keep an eye on app permissions. Another way hackers weasel their way into your device is by getting permission to access things like your location, contacts, and photos—and they’ll use sketchy apps to do it. (Consider the long-running free flashlight app scams mentioned above that requested up to more than 70 different permissions, such as the right to record audio, and video, and access contacts.
So check and see what permissions the app is requesting. If it’s asking for way more than you bargained for, like a simple game wanting access to your camera or microphone, it may be a scam. Delete the app and find a legitimate one that doesn’t ask for invasive permissions like that. If you’re curious about permissions for apps that are already on your phone, iPhone users can learn how to allow or revoke app permission here, and Android can do the same here.
5) Get scam protection. Plenty of scams find your phone by way of sketchy links sent in texts, messages, and emails. Our Text Scam Detector can block them before they do you any harm. And if you tap that link by mistake, Scam Protection still blocks it.
6) Protect your smartphone with security software. With all that we do on our phones, it’s important to get security software installed on them, just like we install it on our computers and laptops. Whether you go with comprehensive security software that protects all of your devices or pick up an app in Google Play or Apple’s App Store, you’ll have malware, web, and device security that’ll help you stay safe on your phone.
The post The Top 5 Scariest Mobile Threats appeared first on McAfee Blog.
This is a self-contained plugin for radare2 that allows to instrument remote processes using frida.
The radare project brings a complete toolchain for reverse engineering, providing well maintained functionalities and extend its features with other programming languages and tools.
Frida is a dynamic instrumentation toolkit that makes it easy to inspect and manipulate running processes by injecting your own JavaScript, and optionally also communicate with your scripts.
FreshRSS :. command):db apir_fs api.The recommended way to install r2frida is via r2pm:
$ r2pm -ci r2frida
Binary builds that don't require compilation will be soon supported in r2pm and r2env. Meanwhile feel free to download the last builds from the Releases page.
In GNU/Debian you will need to install the following packages:
$ sudo apt install -y make gcc libzip-dev nodejs npm curl pkg-config git
$ git clone https://github.com/nowsecure/r2frida.git
$ cd r2frida
$ make
$ make user-install
radare2 (instead of radare2-x.y.z)preconfigure.bat)configure.bat and then make.bat
b\r2frida.dll into r2 -H R2_USER_PLUGINS
For testing, use r2 frida://0, as attaching to the pid0 in frida is a special session that runs in local. Now you can run the :? command to get the list of commands available.
$ r2 'frida://?'
r2 frida://[action]/[link]/[device]/[target]
* action = list | apps | attach | spawn | launch
* link = local | usb | remote host:port
* device = '' | host:port | device-id
* target = pid | appname | process-name | program-in-path | abspath
Local:
* frida://? # show this help
* frida:// # list local processes
* frida://0 # attach to frida-helper (no spawn needed)
* frida:///usr/local/bin/rax2 # abspath to spawn
* frida://rax2 # same as above, considering local/bin is in PATH
* frida://spawn/$(program) # spawn a new process in the current system
* frida://attach/(target) # attach to target PID in current host
USB:
* frida://list/usb// # list processes in the first usb device
* frida://apps/usb// # list apps in the first usb device
* frida://attach/usb//12345 # attach to given pid in the first usb device
* frida://spawn/usb//appname # spawn an app in the first resolved usb device
* frida://launch/usb//appname # spawn+resume an app in the first usb device
Remote:
* frida://attach/remote/10.0.0.3:9999/558 # attach to pid 558 on tcp remote frida-server
Environment: (Use the `%` command to change the environment at runtime)
R2FRIDA_SAFE_IO=0|1 # Workaround a Frida bug on Android/thumb
R2FRIDA_DEBUG=0|1 # Used to debug argument parsing behaviour
R2FRIDA_COMPILER_DISABLE=0|1 # Disable the new frida typescript compiler (`:. foo.ts`)
R2FRIDA_AGENT_SCRIPT=[file] # path to file of the r2frida agent
$ r2 frida://0 # same as frida -p 0, connects to a local session
You can attach, spawn or launch to any program by name or pid, The following line will attach to the first process named rax2 (run rax2 - in another terminal to test this line)
$ r2 frida://rax2 # attach to the first process named `rax2`
$ r2 frida://1234 # attach to the given pid
Using the absolute path of a binary to spawn will spawn the process:
$ r2 frida:///bin/ls
[0x00000000]> :dc # continue the execution of the target program
Also works with arguments:
$ r2 frida://"/bin/ls -al"
For USB debugging iOS/Android apps use these actions. Note that spawn can be replaced with launch or attach, and the process name can be the bundleid or the PID.
$ r2 frida://spawn/usb/ # enumerate devices
$ r2 frida://spawn/usb// # enumerate apps in the first iOS device
$ r2 frida://spawn/usb//Weather # Run the weather app
These are the most frequent commands, so you must learn them and suffix it with ? to get subcommands help.
:i # get information of the target (pid, name, home, arch, bits, ..)
.:i* # import the target process details into local r2
:? # show all the available commands
:dm # list maps. Use ':dm|head' and seek to the program base address
:iE # list the exports of the current binary (seek)
:dt fread # trace the 'fread' function
:dt-* # delete all traces
r2frida plugins run in the agent side and are registered with the r2frida.pluginRegister API.
See the plugins/ directory for some more example plugin scripts.
[0x00000000]> cat example.js
r2frida.pluginRegister('test', function(name) {
if (name === 'test') {
return function(args) {
console.log('Hello Args From r2frida plugin', args);
return 'Things Happen';
}
}
});
[0x00000000]> :. example.js # load the plugin script
The :. command works like the r2's . command, but runs inside the agent.
:. a.js # run script which registers a plugin
:. # list plugins
:.-test # unload a plugin by name
:.. a.js # eternalize script (keeps running after detach)
If you are willing to install and use r2frida natively on Android via Termux, there are some caveats with the library dependencies because of some symbol resolutions. The way to make this work is by extending the LD_LIBRARY_PATH environment to point to the system directory before the termux libdir.
$ LD_LIBRARY_PATH=/system/lib64:$LD_LIBRARY_PATH r2 frida://...
Ensure you are using a modern version of r2 (preferibly last release or git).
Run r2 -L | grep frida to verify if the plugin is loaded, if nothing is printed use the R2_DEBUG=1 environment variable to get some debugging messages to find out the reason.
If you have problems compiling r2frida you can use r2env or fetch the release builds from the GitHub releases page, bear in mind that only MAJOR.MINOR version must match, this is r2-5.7.6 can load any plugin compiled on any version between 5.7.0 and 5.7.8.
+---------+
| radare2 | The radare2 tool, on top of the rest
+---------+
:
+----------+
| io_frida | r2frida io plugin
+----------+
:
+---------+
| frida | Frida host APIs and logic to interact with target
+---------+
:
+-------+
| app | Target process instrumented by Frida with Javascript
+-------+
This plugin has been developed by pancake aka Sergi Alvarez (the author of radare2) for NowSecure.
I would like to thank Ole André for writing and maintaining Frida as well as being so kind to proactively fix bugs and discuss technical details on anything needed to make this union to work. Kudos
Noia is a web-based tool whose main aim is to ease the process of browsing mobile applications sandbox and directly previewing SQLite databases, images, and more. Powered by frida.re.
Please note that I'm not a programmer, but I'm probably above the median in code-savyness. Try it out, open an issue if you find any problems. PRs are welcome.
npm install -g noia
noia
Explore third-party applications files and directories. Noia shows you details including the access permissions, file type and much more.
View custom binary files. Directly preview SQLite databases, images, and more.
Search application by name.
Search files and directories by name.
Navigate to a custom directory using the ctrl+g shortcut.
Download the application files and directories for further analysis.
Basic iOS support
and more
Noia is available on npm, so just type the following command to install it and run it:
npm install -g noia
noia
Noia is powered by frida.re, thus requires Frida to run.
See: * https://frida.re/docs/android/ * https://frida.re/docs/ios/
Security Warning
This tool is not secure and may include some security vulnerabilities so make sure to isolate the webpage from potential hackers.
MIT
Apple and Microsoft recently released software updates to fix dozens of security holes in their operating systems. Microsoft today patched at least 60 vulnerabilities in its Windows OS. Meanwhile, Apple’s new macOS Sonoma addresses at least 68 security weaknesses, and its latest update for iOS fixes two zero-day flaws.
Last week, Apple pushed out an urgent software update to its flagship iOS platform, warning that there were at least two zero-day exploits for vulnerabilities being used in the wild (CVE-2024-23225 and CVE-2024-23296). The security updates are available in iOS 17.4, iPadOS 17.4, and iOS 16.7.6.
Apple’s macOS Sonoma 14.4 Security Update addresses dozens of security issues. Jason Kitka, chief information security officer at Automox, said the vulnerabilities patched in this update often stem from memory safety issues, a concern that has led to a broader industry conversation about the adoption of memory-safe programming languages [full disclosure: Automox is an advertiser on this site].
On Feb. 26, 2024, the Biden administration issued a report that calls for greater adoption of memory-safe programming languages. On Mar. 4, 2024, Google published Secure by Design, which lays out the company’s perspective on memory safety risks.
Mercifully, there do not appear to be any zero-day threats hounding Windows users this month (at least not yet). Satnam Narang, senior staff research engineer at Tenable, notes that of the 60 CVEs in this month’s Patch Tuesday release, only six are considered “more likely to be exploited” according to Microsoft.
Those more likely to be exploited bugs are mostly “elevation of privilege vulnerabilities” including CVE-2024-26182 (Windows Kernel), CVE-2024-26170 (Windows Composite Image File System (CimFS), CVE-2024-21437 (Windows Graphics Component), and CVE-2024-21433 (Windows Print Spooler).
Narang highlighted CVE-2024-21390 as a particularly interesting vulnerability in this month’s Patch Tuesday release, which is an elevation of privilege flaw in Microsoft Authenticator, the software giant’s app for multi-factor authentication. Narang said a prerequisite for an attacker to exploit this flaw is to already have a presence on the device either through malware or a malicious application.
“If a victim has closed and re-opened the Microsoft Authenticator app, an attacker could obtain multi-factor authentication codes and modify or delete accounts from the app,” Narang said. “Having access to a target device is bad enough as they can monitor keystrokes, steal data and redirect users to phishing websites, but if the goal is to remain stealth, they could maintain this access and steal multi-factor authentication codes in order to login to sensitive accounts, steal data or hijack the accounts altogether by changing passwords and replacing the multi-factor authentication device, effectively locking the user out of their accounts.”
CVE-2024-21334 earned a CVSS (danger) score of 9.8 (10 is the worst), and it concerns a weakness in Open Management Infrastructure (OMI), a Linux-based cloud infrastructure in Microsoft Azure. Microsoft says attackers could connect to OMI instances over the Internet without authentication, and then send specially crafted data packets to gain remote code execution on the host device.
CVE-2024-21435 is a CVSS 8.8 vulnerability in Windows OLE, which acts as a kind of backbone for a great deal of communication between applications that people use every day on Windows, said Ben McCarthy, lead cybersecurity engineer at Immersive Labs.
“With this vulnerability, there is an exploit that allows remote code execution, the attacker needs to trick a user into opening a document, this document will exploit the OLE engine to download a malicious DLL to gain code execution on the system,” Breen explained. “The attack complexity has been described as low meaning there is less of a barrier to entry for attackers.”
A full list of the vulnerabilities addressed by Microsoft this month is available at the SANS Internet Storm Center, which breaks down the updates by severity and urgency.
Finally, Adobe today issued security updates that fix dozens of security holes in a wide range of products, including Adobe Experience Manager, Adobe Premiere Pro, ColdFusion 2023 and 2021, Adobe Bridge, Lightroom, and Adobe Animate. Adobe said it is not aware of active exploitation against any of the flaws.
By the way, Adobe recently enrolled all of its Acrobat users into a “new generative AI feature” that scans the contents of your PDFs so that its new “AI Assistant” can “understand your questions and provide responses based on the content of your PDF file.” Adobe provides instructions on how to disable the AI features and opt out here.
Article tags
Mobile Helper Framework is a tool that automates the process of identifying the framework/technology used to create a mobile application. Additionally, it assists in finding sensitive information or provides suggestions for working with the identified platform.
The tool searches for files associated with the technologies used in mobile application development, such as configuration files, resource files, and source code files.
Search files:
index.html
cordova.js
cordova_plugins.js
Search file
Andorid files:
libreactnativejni.so
index.android.bundle
iOS files:
main.jsbundle
❗A minimum of Java 8 is required to run Apktool.
pip install -r requirements.txt
python3 mhf.py app.apk|ipa|aab
python3 mobile_helper_framework.py file.apk
[+] App was written in React Native
Do you want analizy the application (y/n) y
Output directory already exists. Skipping decompilation.
Beauty the react code? (y/n) n
Search any info? (y/n) y
==>>Searching possible internal IPs in the file
results.........
==>>Searching possible emails in the file
results.........
==>>Searching possible interesting words in the file
results.........
==>>Searching Private Keys in the file
results.........
==>>Searching high confidential secrets
results.........
==>>Searching possible sensitive URLs in js files
results.........
==>>Searching possible endpoints in js files results.........
This tool uses Apktool for decompilation of Android applications.
This tool renames the .ipa file of iOS applications to .zip and extracts the contents.
| Feature | Note | Cordova | React Native | Native JavaScript | Flutter | Xamarin |
|---|---|---|---|---|---|---|
| JavaScript beautifier | Use this for the first few occasions to see better results. | ✅ | ✅ | ✅ | ||
| Identifying multiple sensitive information | IPs, Private Keys, API Keys, Emails, URLs | ✅ | ✅ | ✅ | ❌ | |
| Cryptographic Functions | ✅ | ✅ | ✅ | ❌ | ❌ | |
| Endpoint extractor | ✅ | ✅ | ✅ | ❌ | ❌ | |
| Automatically detects if the code has been beautified. | ❌ | ❌ | ❌ | |||
| Extracts automatically apk of devices/emulator | ❌ | ❌ | ❌ | ❌ | ❌ | |
| Patching apk | ✅ | |||||
| Extract an APK from a bundle file. | ✅ | ✅ | ✅ | ✅ | ✅ | |
| Detect if JS files are encrypted | ❌ | ❌ | ||||
| Detect if the resources are compressed. | ❌ | Hermes✅ | ❌ | ❌ | XALZ✅ | |
| Detect if the app is split | ❌ | ❌ | ❌ | ❌ | ❌ |
What is patching apk: This tool uses Reflutter, a framework that assists with reverse engineering of Flutter apps using a patched version of the Flutter library.
More information: https://github.com/Impact-I/reFlutter
Split APKs is a technique used by Android to reduce the size of an application and allow users to download and use only the necessary parts of the application.
Instead of downloading a complete application in a single APK file, Split APKs divide the application into several smaller APK files, each of which contains only a part of the application such as resources, code libraries, assets, and configuration files.
adb shell pm path com.package
package:/data/app/com.package-NW8ZbgI5VPzvSZ1NgMa4CQ==/base.apk
package:/data/app/com.package-NW8ZbgI5VPzvSZ1NgMa4CQ==/split_config.arm64_v8a.apk
package:/data/app/com.package-NW8ZbgI5VPzvSZ1NgMa4CQ==/split_config.en.apk
package:/data/app/com.package-NW8ZbgI5VPzvSZ1NgMa4CQ==/split_config.xxhdpi.apk
For example, in Flutter if the application is a Split it's necessary patch split_config.arm64_v8a.apk, this file contains libflutter.so
Flutter Mobile Application Reverse Engineering Tool by Compiling Dart AOT Runtime
Currently the application supports only Android libapp.so (arm64 only). Also the application is currently work only against recent Dart versions.
For high priority missing features, see TODO
This application uses C++20 Formatting library. It requires very recent C++ compiler such as g++>=13, Clang>=15.
I recommend using Linux OS (only tested on Deiban sid/trixie) because it is easy to setup.
apt install python3-pyelftools python3-requests git cmake ninja-build \
build-essential pkg-config libicu-dev libcapstone-dev
python scripts\init_env_win.py
brew install llvm@15 cmake ninja pkg-config icu4c capstone
pip3 install pyelftools requests
Extract "lib" directory from apk file
python3 blutter.py path/to/app/lib/arm64-v8a out_dir
The blutter.py will automatically detect the Dart version from the flutter engine and call executable of blutter to get the information from libapp.so.
If the blutter executable for required Dart version does not exists, the script will automatically checkout Dart source code and compiling it.
You can use git pull to update and run blutter.py with --rebuild option to force rebuild the executable
python3 blutter.py path/to/app/lib/arm64-v8a out_dir --rebuild
I use Visual Studio to delevlop Blutter on Windows. --vs-sln options can be used to generate a Visual Studio solution.
python blutter.py path\to\lib\arm64-v8a build\vs --vs-sln
Microsoft today issued security updates for more than 100 newly-discovered vulnerabilities in its Windows operating system and related software, including four flaws that are already being exploited. In addition, Apple recently released emergency updates to quash a pair of zero-day bugs in iOS.
Apple last week shipped emergency updates in iOS 17.0.3 and iPadOS 17.0.3 in response to active attacks. The patch fixes CVE-2023-42724, which attackers have been using in targeted attacks to elevate their access on a local device.
Apple said it also patched CVE-2023-5217, which is not listed as a zero-day bug. However, as Bleeping Computer pointed out, this flaw is caused by a weakness in the open-source “libvpx” video codec library, which was previously patched as a zero-day flaw by Google in the Chrome browser and by Microsoft in Edge, Teams, and Skype products. For anyone keeping count, this is the 17th zero-day flaw that Apple has patched so far this year.
Fortunately, the zero-days affecting Microsoft customers this month are somewhat less severe than usual, with the exception of CVE-2023-44487. This weakness is not specific to Windows but instead exists within the HTTP/2 protocol used by the World Wide Web: Attackers have figured out how to use a feature of HTTP/2 to massively increase the size of distributed denial-of-service (DDoS) attacks, and these monster attacks reportedly have been going on for several weeks now.
Amazon, Cloudflare and Google all released advisories today about how they’re addressing CVE-2023-44487 in their cloud environments. Google’s Damian Menscher wrote on Twitter/X that the exploit — dubbed a “rapid reset attack” — works by sending a request and then immediately cancelling it (a feature of HTTP/2). “This lets attackers skip waiting for responses, resulting in a more efficient attack,” Menscher explained.
Natalie Silva, lead security engineer at Immersive Labs, said this flaw’s impact to enterprise customers could be significant, and lead to prolonged downtime.
“It is crucial for organizations to apply the latest patches and updates from their web server vendors to mitigate this vulnerability and protect against such attacks,” Silva said. In this month’s Patch Tuesday release by Microsoft, they have released both an update to this vulnerability, as well as a temporary workaround should you not be able to patch immediately.”
Microsoft also patched zero-day bugs in Skype for Business (CVE-2023-41763) and Wordpad (CVE-2023-36563). The latter vulnerability could expose NTLM hashes, which are used for authentication in Windows environments.
“It may or may not be a coincidence that Microsoft announced last month that WordPad is no longer being updated, and will be removed in a future version of Windows, although no specific timeline has yet been given,” said Adam Barnett, lead software engineer at Rapid7. “Unsurprisingly, Microsoft recommends Word as a replacement for WordPad.”
Other notable bugs addressed by Microsoft include CVE-2023-35349, a remote code execution weakness in the Message Queuing (MSMQ) service, a technology that allows applications across multiple servers or hosts to communicate with each other. This vulnerability has earned a CVSS severity score of 9.8 (10 is the worst possible). Happily, the MSMQ service is not enabled by default in Windows, although Immersive Labs notes that Microsoft Exchange Server can enable this service during installation.
Speaking of Exchange, Microsoft also patched CVE-2023-36778, a vulnerability in all current versions of Exchange Server that could allow attackers to run code of their choosing. Rapid7’s Barnett said successful exploitation requires that the attacker be on the same network as the Exchange Server host, and use valid credentials for an Exchange user in a PowerShell session.
For a more detailed breakdown on the updates released today, see the SANS Internet Storm Center roundup. If today’s updates cause any stability or usability issues in Windows, AskWoody.com will likely have the lowdown on that.
Please consider backing up your data and/or imaging your system before applying any updates. And feel free to sound off in the comments if you experience any difficulties as a result of these patches.
Microsoft today issued software updates to fix at least five dozen security holes in Windows and supported software, including patches for two zero-day vulnerabilities that are already being exploited. Also, Adobe, Google Chrome and Apple iOS users may have their own zero-day patching to do.
On Sept. 7, researchers at Citizen Lab warned they were seeing active exploitation of a “zero-click,” zero-day flaw to install spyware on iOS devices without any interaction from the victim.
“The exploit chain was capable of compromising iPhones running the latest version of iOS (16.6) without any interaction from the victim,” the researchers wrote.
According to Citizen Lab, the exploit uses malicious images sent via iMessage, an embedded component of Apple’s iOS that has been the source of previous zero-click flaws in iPhones and iPads.
Apple says the iOS flaw (CVE-2023-41064) does not seem to work against devices that have its ultra-paranoid “Lockdown Mode” enabled. This feature restricts non-essential iOS features to reduce the device’s overall attack surface, and it was designed for users concerned that they may be subject to targeted attacks. Citizen Lab says the bug it discovered was being exploited to install spyware made by the Israeli cyber surveillance company NSO Group.
This vulnerability is fixed in iOS 16.6.1 and iPadOS 16.6.1. To turn on Lockdown Mode in iOS 16, go to Settings, then Privacy and Security, then Lockdown Mode.
Not to be left out of the zero-day fun, Google acknowledged on Sept. 11 that an exploit for a heap overflow bug in Chrome is being exploited in the wild. Google says it is releasing updates to fix the flaw, and that restarting Chrome is the way to apply any pending updates. Interestingly, Google says this bug was reported by Apple and Citizen Lab.
On the Microsoft front, a zero-day in Microsoft Word is among the more concerning bugs fixed today. Tracked as CVE-2023-36761, it is flagged as an “information disclosure” vulnerability. But that description hardly grasps at the sensitivity of the information potentially exposed here.
Tom Bowyer, manager of product security at Automox, said exploiting this vulnerability could lead to the disclosure of Net-NTLMv2 hashes, which are used for authentication in Windows environments.
“If a malicious actor gains access to these hashes, they can potentially impersonate the user, gaining unauthorized access to sensitive data and systems,” Bowyer said, noting that CVE-2023-36761 can be exploited just by viewing a malicious document in the Windows preview pane. “They could also conduct pass-the-hash attacks, where the attacker uses the hashed version of a password to authenticate themselves without needing to decrypt it.”
The other Windows zero-day fixed this month is CVE-2023-36802. This is an “elevation of privilege” flaw in the “Microsoft Streaming Service Proxy,” which is built into Windows 10, 11 and Windows Server versions. Microsoft says an attacker who successfully exploits the bug can gain SYSTEM level privileges on a Windows computer.
Five of the flaws Microsoft fixed this month earned its “critical” rating, which the software giant reserves for vulnerabilities that can be exploited by malware or malcontents with little or no interaction by Windows users.
According to the SANS Internet Storm Center, the most serious critical bug in September’s Patch Tuesday is CVE-2023-38148, which is a weakness in the Internet Connection Sharing service on Windows. Microsoft says an unauthenticated attacker could leverage the flaw to install malware just sending a specially crafted data packet to a vulnerable Windows system.
Finally, Adobe has released critical security updates for its Adobe Reader and Acrobat software that also fixes a zero-day vulnerability (CVE-2023-26369). More details are at Adobe’s advisory.
For a more granular breakdown of the Windows updates pushed out today, check out Microsoft Patch Tuesday by Morphus Labs. In the meantime, consider backing up your data before updating Windows, and keep an eye on AskWoody.com for reports of any widespread problems with any of the updates released as part of September’s Patch Tuesday.
Update: Mozilla also has fixed zero-day flaw in Firefox and Thunderbird, and the Brave browser was updated as well. It appears the common theme here is any software that uses a code library called “libwebp,” and that this vulnerability is being tracked as CVE-2023-4863.
“This includes Electron-based applications, for example – Signal,” writes StackDiary.com. “Electron patched the vulnerability yesterday. Also, software like Honeyview (from Bandisoft) released an update to fix the issue. CVE-2023-4863 was falsely marked as Chrome-only by Mitre and other organizations that track CVE’s and 100% of media reported this issue as “Chrome only”, when it’s not.”
Microsoft Corp. today released software updates to quash 130 security bugs in its Windows operating systems and related software, including at least five flaws that are already seeing active exploitation. Meanwhile, Apple customers have their own zero-day woes again this month: On Monday, Apple issued (and then quickly pulled) an emergency update to fix a zero-day vulnerability that is being exploited on MacOS and iOS devices.
On July 10, Apple pushed a “Rapid Security Response” update to fix a code execution flaw in the Webkit browser component built into iOS, iPadOS, and macOS Ventura. Almost as soon as the patch went out, Apple pulled the software because it was reportedly causing problems loading certain websites. MacRumors says Apple will likely re-release the patches when the glitches have been addressed.
Launched in May, Apple’s Rapid Security Response updates are designed to address time-sensitive vulnerabilities, and this is the second month Apple has used it. July marks the sixth month this year that Apple has released updates for zero-day vulnerabilities — those that get exploited by malware or malcontents before there is an official patch available.
If you rely on Apple devices and don’t have automatic updates enabled, please take a moment to check the patch status of your various iDevices. The latest security update that includes the fix for the zero-day bug should be available in iOS/iPadOS 16.5.1, macOS 13.4.1, and Safari 16.5.2.
On the Windows side, there are at least four vulnerabilities patched this month that earned high CVSS (badness) scores and that are already being exploited in active attacks, according to Microsoft. They include CVE-2023-32049, which is a hole in Windows SmartScreen that lets malware bypass security warning prompts; and CVE-2023-35311 allows attackers to bypass security features in Microsoft Outlook.
The two other zero-day threats this month for Windows are both privilege escalation flaws. CVE-2023-32046 affects a core Windows component called MSHTML, which is used by Windows and other applications, like Office, Outlook and Skype. CVE-2023-36874 is an elevation of privilege bug in the Windows Error Reporting Service.
Many security experts expected Microsoft to address a fifth zero-day flaw — CVE-2023-36884 — a remote code execution weakness in Office and Windows.
“Surprisingly, there is no patch yet for one of the five zero-day vulnerabilities,” said Adam Barnett, lead software engineer at Rapid7. “Microsoft is actively investigating publicly disclosed vulnerability, and promises to update the advisory as soon as further guidance is available.”
Barnett notes that Microsoft links exploitation of this vulnerability with Storm-0978, the software giant’s name for a cybercriminal group based out of Russia that is identified by the broader security community as RomCom.
“Exploitation of CVE-2023-36884 may lead to installation of the eponymous RomCom trojan or other malware,” Barnett said. “[Microsoft] suggests that RomCom / Storm-0978 is operating in support of Russian intelligence operations. The same threat actor has also been associated with ransomware attacks targeting a wide array of victims.”
Microsoft’s advisory on CVE-2023-36884 is pretty sparse, but it does include a Windows registry hack that should help mitigate attacks on this vulnerability. Microsoft has also published a blog post about phishing campaigns tied to Storm-0978 and to the exploitation of this flaw.
Barnett said it’s while it’s possible that a patch will be issued as part of next month’s Patch Tuesday, Microsoft Office is deployed just about everywhere, and this threat actor is making waves.
“Admins should be ready for an out-of-cycle security update for CVE-2023-36884,” he said.
Microsoft also today released new details about how it plans to address the existential threat of malware that is cryptographically signed by…wait for it….Microsoft.
In late 2022, security experts at Sophos, Trend Micro and Cisco warned that ransomware criminals were using signed, malicious drivers in an attempt to evade antivirus and endpoint detection and response (EDR) tools.
In a blog post today, Sophos’s Andrew Brandt wrote that Sophos identified 133 malicious Windows driver files that were digitally signed since April 2021, and found 100 of those were actually signed by Microsoft. Microsoft said today it is taking steps to ensure those malicious driver files can no longer run on Windows computers.
As KrebsOnSecurity noted in last month’s story on malware signing-as-a-service, code-signing certificates are supposed to help authenticate the identity of software publishers, and provide cryptographic assurance that a signed piece of software has not been altered or tampered with. Both of these qualities make stolen or ill-gotten code-signing certificates attractive to cybercriminal groups, who prize their ability to add stealth and longevity to malicious software.
Dan Goodin at Ars Technica contends that whatever Microsoft may be doing to keep maliciously signed drivers from running on Windows is being bypassed by hackers using open source software that is popular with video game cheaters.
“The software comes in the form of two software tools that are available on GitHub,” Goodin explained. “Cheaters use them to digitally sign malicious system drivers so they can modify video games in ways that give the player an unfair advantage. The drivers clear the considerable hurdle required for the cheat code to run inside the Windows kernel, the fortified layer of the operating system reserved for the most critical and sensitive functions.”
Meanwhile, researchers at Cisco’s Talos security team found multiple Chinese-speaking threat groups have repurposed the tools—one apparently called “HookSignTool” and the other “FuckCertVerifyTimeValidity.”
“Instead of using the kernel access for cheating, the threat actors use it to give their malware capabilities it wouldn’t otherwise have,” Goodin said.
For a closer look at the patches released by Microsoft today, check out the always-thorough Patch Tuesday roundup from the SANS Internet Storm Center. And it’s not a bad idea to hold off updating for a few days until Microsoft works out any kinks in the updates: AskWoody.com usually has the lowdown on any patches that may be causing problems for Windows users.
And as ever, please consider backing up your system or at least your important documents and data before applying system updates. If you encounter any problems with these updates, please drop a note about it here in the comments.
Anyone can try ChatGPT for free. Yet that hasn’t stopped scammers from trying to cash in on it.
A rash of sketchy apps have cropped up in Apple’s App Store and Google Play. They pose as Chat GPT apps and try to fleece smartphone owners with phony subscriptions.
Yet you can spot them quickly when you know what to look for.
ChatGPT is an AI-driven chatbot service created by OpenAI. It lets you have uncannily human conversations with an AI that’s been programmed and fed with information over several generations of development. Provide it with an instruction or ask it a question, and the AI provides a detailed response.
Unsurprisingly, it has millions of people clamoring to use it. All it takes is a single prompt, and the prompts range far and wide.
People ask ChatGPT to help them write cover letters for job interviews, make travel recommendations, and explain complex scientific topics in plain language. One person highlighted how they used ChatGPT to run a tabletop game of Dungeons & Dragons for them. (If you’ve ever played, you know that’s a complex task that calls for a fair share of cleverness to keep the game entertaining.)
That’s just a handful of examples. As for myself, I’ve been using ChatGPT in the kitchen. My family and I have been digging into all kinds of new recipes thanks to its AI.
So, where do the scammers come in?
Scammers, have recently started posting copycat apps that look like they are powered by ChatGPT but aren’t. What’s more, they charge people a fee to use them—a prime example of fleeceware. OpenAI, the makers of ChatGPT, have just officially launched their iOS app for U.S. iPhone users and can be downloaded from the Apple App Store here. The official Android version is still yet to be released.
Fleeceware mimics a pre-existing service that’s free or low-cost and then charges an excessive fee to use it. Basically, it’s a copycat. An expensive one at that.
Fleeceware scammers often lure in their victims with “a free trial” that quickly converts into a subscription. However, with fleeceware, the terms of the subscription are steep. They might bill the user weekly, and at rates much higher than the going rate.
The result is that the fleeceware app might cost the victim a few bucks before they can cancel it. Worse yet, the victim might forget about the app entirely and run up hundreds of dollars before they realize what’s happening. Again, all for a simple app that’s free or practically free elsewhere.
What makes fleeceware so tricky to spot is that it can look legit at first glance. Plenty of smartphone apps offer subscriptions and other in-app purchases. In effect, fleeceware hides in plain sight among the thousands of other legitimate apps in the hopes you’ll download it.
With that, any app that charges a fee to use ChatGPT is fleeceware. ChatGPT offers basic functionality that anyone can use for free.
There is one case where you might pay a fee to use ChatGPT. It has its own subscription-level offering, ChatGPT Plus. With a subscription, ChatGPT responds more quickly to prompts and offers access during peak hours when free users might be shut out. That’s the one legitimate case where you might pay to use it.
In all, more and more people want to take ChatGPT for a spin. However, they might not realize it’s free. Scammers bank on that, and so we’ve seen a glut of phony ChatGPT apps that aim to install fleeceware onto people’s phones.
Read the description of the app and see what the developer is really offering. If the app charges you to use ChatGPT, it’s fleeceware. Anyone can use ChatGPT for free by setting up an account at its official website, https://chat.openai.com.
Reviews can tell you quite a bit about an app. They can also tell you the company that created it handles customer feedback.
In the case of fleeceware, you’ll likely see reviews that complain about sketchy payment terms. They might mention three-day trials that automatically convert to pricey monthly or weekly subscriptions. Moreover, they might describe how payment terms have changed and become more costly as a result.
In the case of legitimate apps, billing issues can arise from time to time, so see how the company handles complaints. Companies in good standing will typically provide links to customer service where people can resolve any issues they have. Company responses that are vague, or a lack of responses at all, should raise a red flag.
Scammers are smart. They’ll count on you to look at an overall good review of 4/5 stars or more and think that’s good enough. They know this, so they’ll pack their app landing page with dozens and dozens of phony and fawning reviews to make the app look legitimate. This tactic serves another purpose: it hides the true reviews written by actual users, which might be negative because the app is a scam.
Filter the app’s reviews for the one-star reviews and see what concerns people have. Do they mention overly aggressive billing practices, like the wickedly high prices and weekly billing cycles mentioned above? That might be a sign of fleeceware. Again, see if the app developer responded to the concerns and note the quality of the response. A legitimate company will honestly want to help a frustrated user and provide clear next steps to resolve the issue.
Google Play does its part to keep its virtual shelves free of malware-laden apps with a thorough submission process, as reported by Google. It further keeps things safer through its App Defense Alliance that shares intelligence across a network of partners, of which we’re a proud member. Further, users also have the option of running Play Protect to check apps for safety before they’re downloaded. Apple’s App Store has its own rigorous submission process for submitting apps. Likewise, Apple deletes hundreds of thousands of malicious apps from its store each year.
Third-party app stores might not have protections like these in place. Moreover, some of them might be fronts for illegal activity. Organized cybercrime organizations deliberately populate their third-party stores with apps that steal funds or personal information. Stick with the official app stores for the most complete protection possible.
Many fleeceware apps deliberately make it tough to cancel them. You’ll often see complaints about that in reviews, “I don’t see where I can cancel my subscription!” Deleting the app from your phone is not enough. Your subscription will remain active unless you cancel your payment method.
Luckily, your phone makes it easy to cancel subscriptions right from your settings menu. Canceling makes sure your credit or debit card won’t get charged when the next billing cycle comes up.
Be wary. Many fleeceware apps have aggressive billing cycles. Sometimes weekly.
ChatGPT is free. Anyone can use it by setting up a free account with OpenAI at https://chat.openai.com. Smartphone apps that charge you to use it are a scam.
You can download the official app, currently on iOS from the App Store
The post Anyone Can Try ChatGPT for Free—Don’t Fall for Sketchy Apps That Charge You appeared first on McAfee Blog.
Microsoft today released software updates to plug 100 security holes in its Windows operating systems and other software, including a zero-day vulnerability that is already being used in active attacks. Not to be outdone, Apple has released a set of important updates addressing two zero-day vulnerabilities that are being used to attack iPhones, iPads and Macs.
On April 7, Apple issued emergency security updates to fix two weaknesses that are being actively exploited, including CVE-2023-28206, which can be exploited by apps to seize control over a device. CVE-2023-28205 can be used by a malicious or hacked website to install code.
Both vulnerabilities are addressed in iOS/iPadOS 16.4.1, iOS 15.7.5, and macOS 12.6.5 and 11.7.6. If you use Apple devices and you don’t have automatic updates enabled (they are on by default), you should probably take care of that soon as detailed instructions on how to attack CVE-2023-28206 are now public.
Microsoft’s bevy of 100 security updates released today include CVE-2023-28252, which is a weakness in Windows that Redmond says is under active attack. The vulnerability is in the Windows Common Log System File System (CLFS) driver, a core Windows component that was the source of attacks targeting a different zero-day vulnerability in February 2023.
“If it seems familiar, that’s because there was a similar 0-day patched in the same component just two months ago,” said Dustin Childs at the Trend Micro Zero Day Initiative. “To me, that implies the original fix was insufficient and attackers have found a method to bypass that fix. As in February, there is no information about how widespread these attacks may be. This type of exploit is typically paired with a code execution bug to spread malware or ransomware.”
According to the security firm Qualys, this vulnerability has been leveraged by cyber criminals to deploy Nokoyawa ransomware.
“This is a relatively new strain for which there is some open source intel to suggest that it is possibly related to Hive ransomware – one of the most notable ransomware families of 2021 and linked to breaches of over 300+ organizations in a matter of just a few months,” said Bharat Jogi, director of vulnerability and threat research at Qualys.
Jogi said while it is still unclear which exact threat actor is targeting CVE-2023-28252, targets have been observed in South and North America, regions across Asia and at organizations in the Middle East.
Satnam Narang at Tenable notes that CVE-2023-28252 is also the second CLFS zero-day disclosed to Microsoft by researchers from Mandiant and DBAPPSecurity (CVE-2022-37969), though it is unclear if both of these discoveries are related to the same attacker.
Seven of the 100 vulnerabilities Microsoft fixed today are rated “Critical,” meaning they can be used to install malicious code with no help from the user. Ninety of the flaws earned Redmond’s slightly less-dire “Important” label, which refers to weaknesses that can be used to undermine the security of the system but which may require some amount of user interaction.
Narang said Microsoft has rated nearly 90% of this month’s vulnerabilities as “Exploitation Less Likely,” while just 9.3% of flaws were rated as “Exploitation More Likely.” Kevin Breen at Immersive Labs zeroed in on several notable flaws in that 9.3%, including CVE-2023-28231, a remote code execution vulnerability in a core Windows network process (DHCP) with a CVSS score of 8.8.
“‘Exploitation more likely’ means it’s not being actively exploited but adversaries may look to try and weaponize this one,” Breen said. “Micorosft does note that successful exploitation requires an attacker to have already gained initial access to the network. This could be via social engineering, spear phishing attacks, or exploitation of other services.”
Breen also called attention to CVE-2023-28220 and CVE-2023-28219 — a pair of remote code execution vulnerabilities affecting Windows Remote Access Servers (RAS) that also earned Microsoft’s “exploitation more likely” label.
“An attacker can exploit this vulnerability by sending a specially crafted connection request to a RAS server, which could lead to remote code execution,” Breen said. While not standard in all organizations, RAS servers typically have direct access from the Internet where most users and services are connected. This makes it extremely enticing for attackers as they don’t need to socially engineer their way into an organization. They can simply scan the internet for RAS servers and automate the exploitation of vulnerable devices.”
For more details on the updates released today, see the SANS Internet Storm Center roundup. If today’s updates cause any stability or usability issues in Windows, AskWoody.com will likely have the lowdown on that.
Please consider backing up your data and/or imaging your system before applying any updates. And feel free to sound off in the comments if you experience any problems as a result of these patches.
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