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ModTracer Finds Hidden Linux Kernel Rootkits and then make visible again.
Another way to make an LKM visible is using the imperius trick: https://github.com/MatheuZSecurity/Imperius
A safer internet isn’t a nice thing to have. It’s a necessity because we rely on it so heavily. And there’s plenty we can do to make it happen.
A safer internet might seem like it’s a bit out of our hands as individuals. The truth is that each of us plays a major role in making it so. As members, contributors, and participants who hop on the internet daily, our actions can make the internet a safer place.
So, specifically, what can we do? Take a few moments to ponder the questions that follow. Using them can help frame your thinking about internet safety and how you can make yourself, and others, safer.
Device safety is relatively straightforward provided you take the steps to ensure it. You can protect your things with comprehensive online protection like our McAfee+ plans, you can update your devices and apps, and you can use strong, unique passwords with the help of a password manager.
Put another way, internet safety is another way to keep your house in shape. Just as you mow your lawn, swap out the batteries in your smoke alarm, or change the filters in your heating system, much goes the same for the way you should look after computers, tablets, phones, and connected devices in your home. They need your regular care and maintenance as well. Again, good security software can handle so much of this automatically or with relatively easy effort on your part.
If you’re wondering where to start with looking after the security of your devices, check out our article on how to become an IT pro in your home. It makes the process easy by breaking down the basics into steps that build your confidence along the way.
This includes all kinds of topics. The range covers identity theft, protecting your personal info, privacy, cyberbullying, screen time, when to get a smartphone for your child, and learning how to spot scams online. Just to name a few. And if you visit our blogs from time to time, you see that we cover those and other topics in detail. It offers a solid resource any time you have questions.
Certainly, you have tools that can give you a big hand with those concerns. That includes virtual private networks (VPNs) that encrypt your personal info, built-in browser advisors that help you search and surf safely, plus scam protection that lets you know when sketchy links pop up in emails and messages.
However, internet safety goes beyond devices. It’s a mindset. As with driving a car, so much of our online safety relies on our behaviors and good judgment. For example, one piece of research found that ninety-one percent of all cyberattacks start with phishing emails.i
As Tomas Holt, professor of criminal justice at Michigan State University, states, “An individual’s characteristics are critical in studying how cybercrime perseveres, particularly the person’s impulsiveness and the activities that they engage in while online that have the greatest impact on their risk.”
Put another way, scammers bank on an itchy clicker-finger — where a quick click opens the door for an attack. Educating your family about the risks out there, such as phishing attacks and sketchy links that crop up in search goes a long way to keep everyone out of trouble. In combination with online protection software like ours covers the rest of the way.
A big part of a safer internet is us. Specifically, how we treat each other — and how we project ourselves to friends, family, and the wider internet. With so much of our communication happening online through the written word or posted pictures, all of it creates a climate around each of us. It can take on an uplifting air or mire you in a cloud of negativity. What’s more, it’s largely out there for all to see. Especially on social media.
Take time to pause and reflect on your climate. A good place to start is with basic etiquette. Verywell Family put together an article on internet etiquette for kids, yet when you give it a close read, you’ll see that it provides good advice for everyone.ii
In summary, their advice focuses on five key points:
Of course, the flip side to all of this is what to do when someone targets you with their bad behavior. Such as when an online troll who hurls hurtful or malicious comments your way. That’s a topic in itself. Check out our article on internet trolls and how to handle them. Once again, the advice there is great for everyone in the family.
We’ve shared quite a bit of info in this article and loaded it up with plenty of helpful links too. Don’t feel like you have to take care of everything in one sitting. See what you have in place and make notes about where you’d like to make improvements. Then, start working down the list. A few minutes each week dedicated to your security can greatly increase your security, safety, and savvy.
[i] https://www.darkreading.com/endpoint/91–of-cyberattacks-start-with-a-phishing-email/d/d-id/1327704
[ii] https://www.verywellfamily.com/things-to-teach-your-kids-about-digital-etiquette-460548
The post Internet Safety Begins with All of Us appeared first on McAfee Blog.
JA4+ is a suite of network Fingerprinting methods that are easy to use and easy to share. These methods are both human and machine readable to facilitate more effective threat-hunting and analysis. The use-cases for these fingerprints include scanning for threat actors, malware detection, session hijacking prevention, compliance automation, location tracking, DDoS detection, grouping of threat actors, reverse shell detection, and many more.
Please read our blogs for details on how JA4+ works, why it works, and examples of what can be detected/prevented with it:
JA4+ Network Fingerprinting (JA4/S/H/L/X/SSH)
JA4T: TCP Fingerprinting (JA4T/TS/TScan)
To understand how to read JA4+ fingerprints, see Technical Details
This repo includes JA4+ Python, Rust, Zeek and C, as a Wireshark plugin.
JA4/JA4+ support is being added to:
GreyNoise
Hunt
Driftnet
DarkSail
Arkime
GoLang (JA4X)
Suricata
Wireshark
Zeek
nzyme
Netresec's CapLoader
NetworkMiner">Netresec's NetworkMiner
NGINX
F5 BIG-IP
nfdump
ntop's ntopng
ntop's nDPI
Team Cymru
NetQuest
Censys
Exploit.org's Netryx
cloudflare.com/bots/concepts/ja3-ja4-fingerprint/">Cloudflare
fastly
with more to be announced...
| Application | JA4+ Fingerprints |
|---|---|
| Chrome |
JA4=t13d1516h2_8daaf6152771_02713d6af862 (TCP) JA4=q13d0312h3_55b375c5d22e_06cda9e17597 (QUIC) JA4=t13d1517h2_8daaf6152771_b0da82dd1658 (pre-shared key) JA4=t13d1517h2_8daaf6152771_b1ff8ab2d16f (no key) |
| IcedID Malware Dropper | JA4H=ge11cn020000_9ed1ff1f7b03_cd8dafe26982 |
| IcedID Malware |
JA4=t13d201100_2b729b4bf6f3_9e7b989ebec8 JA4S=t120300_c030_5e2616a54c73
|
| Sliver Malware |
JA4=t13d190900_9dc949149365_97f8aa674fd9 JA4S=t130200_1301_a56c5b993250 JA4X=000000000000_4f24da86fad6_bf0f0589fc03 JA4X=000000000000_7c32fa18c13e_bf0f0589fc03
|
| Cobalt Strike |
JA4H=ge11cn060000_4e59edc1297a_4da5efaf0cbd JA4X=2166164053c1_2166164053c1_30d204a01551
|
| SoftEther VPN |
JA4=t13d880900_fcb5b95cb75a_b0d3b4ac2a14 (client) JA4S=t130200_1302_a56c5b993250 JA4X=d55f458d5a6c_d55f458d5a6c_0fc8c171b6ae
|
| Qakbot | JA4X=2bab15409345_af684594efb4_000000000000 |
| Pikabot | JA4X=1a59268f55e5_1a59268f55e5_795797892f9c |
| Darkgate | JA4H=po10nn060000_cdb958d032b0 |
| LummaC2 | JA4H=po11nn050000_d253db9d024b |
| Evilginx | JA4=t13d191000_9dc949149365_e7c285222651 |
| Reverse SSH Shell | JA4SSH=c76s76_c71s59_c0s70 |
| Windows 10 | JA4T=64240_2-1-3-1-1-4_1460_8 |
| Epson Printer | JA4TScan=28960_2-4-8-1-3_1460_3_1-4-8-16 |
For more, see ja4plus-mapping.csv
The mapping file is unlicensed and free to use. Feel free to do a pull request with any JA4+ data you find.
Recommended to have tshark version 4.0.6 or later for full functionality. See: https://pkgs.org/search/?q=tshark
Download the latest JA4 binaries from: Releases.
FreshRSS 
sudo apt install tshark
./ja4 [options] [pcap]
1) Install Wireshark https://www.wireshark.org/download.html which will install tshark 2) Add tshark to $PATH
ln -s /Applications/Wireshark.app/Contents/MacOS/tshark /usr/local/bin/tshark
./ja4 [options] [pcap]
1) Install Wireshark for Windows from https://www.wireshark.org/download.html which will install tshark.exe
tshark.exe is at the location where wireshark is installed, for example: C:\Program Files\Wireshark\thsark.exe
2) Add the location of tshark to your "PATH" environment variable in Windows.
(System properties > Environment Variables... > Edit Path)
3) Open cmd, navigate the ja4 folder
ja4 [options] [pcap]
An official JA4+ database of fingerprints, associated applications and recommended detection logic is in the process of being built.
In the meantime, see ja4plus-mapping.csv
Feel free to do a pull request with any JA4+ data you find.
JA4+ is a set of simple yet powerful network fingerprints for multiple protocols that are both human and machine readable, facilitating improved threat-hunting and security analysis. If you are unfamiliar with network fingerprinting, I encourage you to read my blogs releasing JA3 here, JARM here, and this excellent blog by Fastly on the State of TLS Fingerprinting which outlines the history of the aforementioned along with their problems. JA4+ brings dedicated support, keeping the methods up-to-date as the industry changes.
All JA4+ fingerprints have an a_b_c format, delimiting the different sections that make up the fingerprint. This allows for hunting and detection utilizing just ab or ac or c only. If one wanted to just do analysis on incoming cookies into their app, they would look at JA4H_c only. This new locality-preserving format facilitates deeper and richer analysis while remaining simple, easy to use, and allowing for extensibility.
For example; GreyNoise is an internet listener that identifies internet scanners and is implementing JA4+ into their product. They have an actor who scans the internet with a constantly changing single TLS cipher. This generates a massive amount of completely different JA3 fingerprints but with JA4, only the b part of the JA4 fingerprint changes, parts a and c remain the same. As such, GreyNoise can track the actor by looking at the JA4_ac fingerprint (joining a+c, dropping b).
Current methods and implementation details:
| Full Name | Short Name | Description | |---|---|---| | JA4 | JA4 | TLS Client Fingerprinting
| JA4Server | JA4S | TLS Server Response / Session Fingerprinting | JA4HTTP | JA4H | HTTP Client Fingerprinting | JA4Latency | JA4L | Latency Measurment / Light Distance | JA4X509 | JA4X | X509 TLS Certificate Fingerprinting | JA4SSH | JA4SSH | SSH Traffic Fingerprinting | JA4TCP | JA4T | TCP Client Fingerprinting | JA4TCPServer | JA4TS | TCP Server Response Fingerprinting | JA4TCPScan | JA4TScan | Active TCP Fingerprint Scanner
The full name or short name can be used interchangeably. Additional JA4+ methods are in the works...
To understand how to read JA4+ fingerprints, see Technical Details
JA4: TLS Client Fingerprinting is open-source, BSD 3-Clause, same as JA3. FoxIO does not have patent claims and is not planning to pursue patent coverage for JA4 TLS Client Fingerprinting. This allows any company or tool currently utilizing JA3 to immediately upgrade to JA4 without delay.
JA4S, JA4L, JA4H, JA4X, JA4SSH, JA4T, JA4TScan and all future additions, (collectively referred to as JA4+) are licensed under the FoxIO License 1.1. This license is permissive for most use cases, including for academic and internal business purposes, but is not permissive for monetization. If, for example, a company would like to use JA4+ internally to help secure their own company, that is permitted. If, for example, a vendor would like to sell JA4+ fingerprinting as part of their product offering, they would need to request an OEM license from us.
All JA4+ methods are patent pending.
JA4+ is a trademark of FoxIO
JA4+ can and is being implemented into open source tools, see the License FAQ for details.
This licensing allows us to provide JA4+ to the world in a way that is open and immediately usable, but also provides us with a way to fund continued support, research into new methods, and the development of the upcoming JA4 Database. We want everyone to have the ability to utilize JA4+ and are happy to work with vendors and open source projects to help make that happen.
ja4plus-mapping.csv is not included in the above software licenses and is thereby a license-free file.
Q: Why are you sorting the ciphers? Doesn't the ordering matter?
A: It does but in our research we've found that applications and libraries choose a unique cipher list more than unique ordering. This also reduces the effectiveness of "cipher stunting," a tactic of randomizing cipher ordering to prevent JA3 detection.
Q: Why are you sorting the extensions?
A: Earlier in 2023, Google updated Chromium browsers to randomize their extension ordering. Much like cipher stunting, this was a tactic to prevent JA3 detection and "make the TLS ecosystem more robust to changes." Google was worried server implementers would assume the Chrome fingerprint would never change and end up building logic around it, which would cause issues whenever Google went to update Chrome.
So I want to make this clear: JA4 fingerprints will change as application TLS libraries are updated, about once a year. Do not assume fingerprints will remain constant in an environment where applications are updated. In any case, sorting the extensions gets around this and adding in Signature Algorithms preserves uniqueness.
Q: Doesn't TLS 1.3 make fingerprinting TLS clients harder?
A: No, it makes it easier! Since TLS 1.3, clients have had a much larger set of extensions and even though TLS1.3 only supports a few ciphers, browsers and applications still support many more.
John Althouse, with feedback from:
Josh Atkins
Jeff Atkinson
Joshua Alexander
W.
Joe Martin
Ben Higgins
Andrew Morris
Chris Ueland
Ben Schofield
Matthias Vallentin
Valeriy Vorotyntsev
Timothy Noel
Gary Lipsky
And engineers working at GreyNoise, Hunt, Google, ExtraHop, F5, Driftnet and others.
Contact John Althouse at john@foxio.io for licensing and questions.
Copyright (c) 2024, FoxIO
The ability to generate NetFlow from devices that do not natively produce it along with significant storage efficiency and improved workflows make for a significant update to CTB.
Cisco Telemetry… Read more on Cisco Blogs
