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President Trump last week revoked security clearances for Chris Krebs, the former director of the Cybersecurity and Infrastructure Security Agency (CISA) who was fired by Trump after declaring the 2020 election the most secure in U.S. history. The White House memo, which also suspended clearances for other security professionals at Krebs’s employer SentinelOne, comes as CISA is facing huge funding and staffing cuts.
Chris Krebs. Image: Getty Images.
The extraordinary April 9 memo directs the attorney general to investigate Chris Krebs (no relation), calling him “a significant bad-faith actor who weaponized and abused his government authority.”
The memo said the inquiry will include “a comprehensive evaluation of all of CISA’s activities over the last 6 years and will identify any instances where Krebs’ or CISA’s conduct appears to be contrary to the administration’s commitment to free speech and ending federal censorship, including whether Krebs’ conduct was contrary to suitability standards for federal employees or involved the unauthorized dissemination of classified information.”
CISA was created in 2018 during Trump’s first term, with Krebs installed as its first director. In 2020, CISA launched Rumor Control, a website that sought to rebut disinformation swirling around the 2020 election.
That effort ran directly counter to Trump’s claims that he lost the election because it was somehow hacked and stolen. The Trump campaign and its supporters filed at least 62 lawsuits contesting the election, vote counting, and vote certification in nine states, and nearly all of those cases were dismissed or dropped for lack of evidence or standing.
When the Justice Department began prosecuting people who violently attacked the U.S. Capitol on January 6, 2021, President Trump and Republican leaders shifted the narrative, claiming that Trump lost the election because the previous administration had censored conservative voices on social media.
Incredibly, the president’s memo seeking to ostracize Krebs stands reality on its head, accusing Krebs of promoting the censorship of election information, “including known risks associated with certain voting practices.” Trump also alleged that Krebs “falsely and baselessly denied that the 2020 election was rigged and stolen, including by inappropriately and categorically dismissing widespread election malfeasance and serious vulnerabilities with voting machines” [emphasis added].
Krebs did not respond to a request for comment. SentinelOne issued a statement saying it would cooperate in any review of security clearances held by its personnel, which is currently fewer than 10 employees.
Krebs’s former agency is now facing steep budget and staff reductions. The Record reports that CISA is looking to remove some 1,300 people by cutting about half its full-time staff and another 40% of its contractors.
“The agency’s National Risk Management Center, which serves as a hub analyzing risks to cyber and critical infrastructure, is expected to see significant cuts, said two sources familiar with the plans,” The Record’s Suzanne Smalley wrote. “Some of the office’s systematic risk responsibilities will potentially be moved to the agency’s Cybersecurity Division, according to one of the sources.”
CNN reports the Trump administration is also advancing plans to strip civil service protections from 80% of the remaining CISA employees, potentially allowing them to be fired for political reasons.
The Electronic Frontier Foundation (EFF) urged professionals in the cybersecurity community to defend Krebs and SentinelOne, noting that other security companies and professionals could be the next victims of Trump’s efforts to politicize cybersecurity.
“The White House must not be given free reign to turn cybersecurity professionals into political scapegoats,” the EFF wrote. “It is critical that the cybersecurity community now join together to denounce this chilling attack on free speech and rally behind Krebs and SentinelOne rather than cowering because they fear they will be next.”
However, Reuters said it found little sign of industry support for Krebs or SentinelOne, and that many security professionals are concerned about potentially being targeted if they speak out.
“Reuters contacted 33 of the largest U.S. cybersecurity companies, including tech companies and professional services firms with large cybersecurity practices, and three industry groups, for comment on Trump’s action against SentinelOne,” wrote Raphael Satter and A.J. Vicens. “Only one offered comment on Trump’s action. The rest declined, did not respond or did not answer questions.”
On April 3, President Trump fired Gen. Timothy Haugh, the head of the National Security Agency (NSA) and the U.S. Cyber Command, as well as Haugh’s deputy, Wendy Noble. The president did so immediately after meeting in the Oval Office with far-right conspiracy theorist Laura Loomer, who reportedly urged their dismissal. Speaking to reporters on Air Force One after news of the firings broke, Trump questioned Haugh’s loyalty.
Gen. Timothy Haugh. Image: C-SPAN.
Virginia Senator Mark Warner, the top Democrat on the Senate Intelligence Committee, called it inexplicable that the administration would remove the senior leaders of NSA-CYBERCOM without cause or warning, and risk disrupting critical ongoing intelligence operations.
“It is astonishing, too, that President Trump would fire the nonpartisan, experienced leader of the National Security Agency while still failing to hold any member of his team accountable for leaking classified information on a commercial messaging app – even as he apparently takes staffing direction on national security from a discredited conspiracy theorist in the Oval Office,” Warner said in a statement.
On Feb. 28, The Record’s Martin Matishak cited three sources saying Defense Secretary Pete Hegseth ordered U.S. Cyber Command to stand down from all planning against Russia, including offensive digital actions. The following day, The Guardian reported that analysts at CISA were verbally informed that they were not to follow or report on Russian threats, even though this had previously been a main focus for the agency.
A follow-up story from The Washington Post cited officials saying Cyber Command had received an order to halt active operations against Russia, but that the pause was intended to last only as long as negotiations with Russia continue.
The Department of Defense responded on Twitter/X that Hegseth had “neither canceled nor delayed any cyber operations directed against malicious Russian targets and there has been no stand-down order whatsoever from that priority.”
But on March 19, Reuters reported several U.S. national security agencies have halted work on a coordinated effort to counter Russian sabotage, disinformation and cyberattacks.
“Regular meetings between the National Security Council and European national security officials have gone unscheduled, and the NSC has also stopped formally coordinating efforts across U.S. agencies, including with the FBI, the Department of Homeland Security and the State Department,” Reuters reported, citing current and former officials.
President’s Trump’s institution of 125% tariffs on goods from China has seen Beijing strike back with 84 percent tariffs on U.S. imports. Now, some security experts are warning that the trade war could spill over into a cyber conflict, given China’s successful efforts to burrow into America’s critical infrastructure networks.
Over the past year, a number of Chinese government-backed digital intrusions have come into focus, including a sprawling espionage campaign involving the compromise of at least nine U.S. telecommunications providers. Dubbed “Salt Typhoon” by Microsoft, these telecom intrusions were pervasive enough that CISA and the FBI in December 2024 warned Americans against communicating sensitive information over phone networks, urging people instead to use encrypted messaging apps (like Signal).
The other broad ranging China-backed campaign is known as “Volt Typhoon,” which CISA described as “state-sponsored cyber actors seeking to pre-position themselves on IT networks for disruptive or destructive cyberattacks against U.S. critical infrastructure in the event of a major crisis or conflict with the United States.”
Responsibility for determining the root causes of the Salt Typhoon security debacle fell to the Cyber Safety Review Board (CSRB), a nonpartisan government entity established in February 2022 with a mandate to investigate the security failures behind major cybersecurity events. But on his first full day back in the White House, President Trump dismissed all 15 CSRB advisory committee members — likely because those advisers included Chris Krebs.
Last week, Sen. Ron Wyden (D-Ore.) placed a hold on Trump’s nominee to lead CISA, saying the hold would continue unless the agency published a report on the telecom industry hacks, as promised.
“CISA’s multi-year cover up of the phone companies’ negligent cybersecurity has real consequences,” Wyden said in a statement. “Congress and the American people have a right to read this report.”
The Wall Street Journal reported last week Chinese officials acknowledged in a secret December meeting that Beijing was behind the widespread telecom industry compromises.
“The Chinese official’s remarks at the December meeting were indirect and somewhat ambiguous, but most of the American delegation in the room interpreted it as a tacit admission and a warning to the U.S. about Taiwan,” The Journal’s Dustin Volz wrote, citing a former U.S. official familiar with the meeting.
Meanwhile, China continues to take advantage of the mass firings of federal workers. On April 9, the National Counterintelligence and Security Center warned (PDF) that Chinese intelligence entities are pursuing an online effort to recruit recently laid-off U.S. employees.
“Foreign intelligence entities, particularly those in China, are targeting current and former U.S. government (USG) employees for recruitment by posing as consulting firms, corporate headhunters, think tanks, and other entities on social and professional networking sites,” the alert warns. “Their deceptive online job offers, and other virtual approaches, have become more sophisticated in targeting unwitting individuals with USG backgrounds seeking new employment.”
Image: Dni.gov
As Reuters notes, the FBI last month ended an effort to counter interference in U.S. elections by foreign adversaries including Russia, and put on leave staff working on the issue at the Department of Homeland Security.
Meanwhile, the U.S. Senate is now considering a House-passed bill dubbed the “Safeguard American Voter Eligibility (SAVE) Act,” which would order states to obtain proof of citizenship, such as a passport or a birth certificate, in person from those seeking to register to vote.
Critics say the SAVE Act could disenfranchise millions of voters and discourage eligible voters from registering to vote. What’s more, documented cases of voter fraud are few and far between, as is voting by non-citizens. Even the conservative Heritage Foundation acknowledges as much: An interactive “election fraud map” published by Heritage lists just 1,576 convictions or findings of voter fraud between 1982 and the present day.
Nevertheless, the GOP-led House passed the SAVE Act with the help of four Democrats. Its passage in the Senate will require support from at least seven Democrats, Newsweek writes.
In February, CISA cut roughly 130 employees, including its election security advisors. The agency also was forced to freeze all election security activities pending an internal review. The review was reportedly completed in March, but the Trump administration has said the findings would not be made public, and there is no indication of whether any cybersecurity support has been restored.
Many state leaders have voiced anxiety over the administration’s cuts to CISA programs that provide assistance and threat intelligence to election security efforts. Iowa Secretary of State Paul Pate last week told the PBS show Iowa Press he would not want to see those programs dissolve.
“If those (systems) were to go away, it would be pretty serious,” Pate said. “We do count on a lot those cyber protections.”
Pennsylvania’s Secretary of the Commonwealth Al Schmidt recently warned the CISA election security cuts would make elections less secure, and said no state on its own can replace federal election cybersecurity resources.
The Pennsylvania Capital-Star reports that several local election offices received bomb threats around the time polls closed on Nov. 5, and that in the week before the election a fake video showing mail-in ballots cast for Trump and Sen. Dave McCormick (R-Pa.) being destroyed and thrown away was linked to a Russian disinformation campaign.
“CISA was able to quickly identify not only that it was fraudulent, but also the source of it, so that we could share with our counties and we could share with the public so confidence in the election wasn’t undermined,” Schmidt said.
According to CNN, the administration’s actions have deeply alarmed state officials, who warn the next round of national elections will be seriously imperiled by the cuts. A bipartisan association representing 46 secretaries of state, and several individual top state election officials, have pressed the White House about how critical functions of protecting election security will perform going forward. However, CNN reports they have yet to receive clear answers.
Nevada and 18 other states are suing Trump over an executive order he issued on March 25 that asserts the executive branch has broad authority over state election procedures.
“None of the president’s powers allow him to change the rules of elections,” Nevada Secretary of State Cisco Aguilar wrote in an April 11 op-ed. “That is an intentional feature of our Constitution, which the Framers built in to ensure election integrity. Despite that, Trump is seeking to upend the voter registration process; impose arbitrary deadlines on vote counting; allow an unelected and unaccountable billionaire to invade state voter rolls; and withhold congressionally approved funding for election security.”
The order instructs the U.S. Election Assistance Commission to abruptly amend the voluntary federal guidelines for voting machines without going through the processes mandated by federal law. And it calls for allowing the administrator of the so-called Department of Government Efficiency (DOGE), along with DHS, to review state voter registration lists and other records to identify non-citizens.
The Atlantic’s Paul Rosenzweig notes that the chief executive of the country — whose unilateral authority the Founding Fathers most feared — has literally no role in the federal election system.
“Trump’s executive order on elections ignores that design entirely,” Rosenzweig wrote. “He is asserting an executive-branch role in governing the mechanics of a federal election that has never before been claimed by a president. The legal theory undergirding this assertion — that the president’s authority to enforce federal law enables him to control state election activity — is as capacious as it is frightening.”
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In large metropolitan areas, tourists are often easy to spot because they’re far more inclined than locals to gaze upward at the surrounding skyscrapers. Security experts say this same tourist dynamic is a dead giveaway in virtually all computer intrusions that lead to devastating attacks like data theft and ransomware, and that more organizations should set simple virtual tripwires that sound the alarm when authorized users and devices are spotted exhibiting this behavior.
In a blog post published last month, Cisco Talos said it was seeing a worrisome “increase in the rate of high-sophistication attacks on network infrastructure.” Cisco’s warning comes amid a flurry of successful data ransom and state-sponsored cyber espionage attacks targeting some of the most well-defended networks on the planet.
But despite their increasing complexity, a great many initial intrusions that lead to data theft could be nipped in the bud if more organizations started looking for the telltale signs of newly-arrived cybercriminals behaving like network tourists, Cisco says.
“One of the most important things to talk about here is that in each of the cases we’ve seen, the threat actors are taking the type of ‘first steps’ that someone who wants to understand (and control) your environment would take,” Cisco’s Hazel Burton wrote. “Examples we have observed include threat actors performing a ‘show config,’ ‘show interface,’ ‘show route,’ ‘show arp table’ and a ‘show CDP neighbor.’ All these actions give the attackers a picture of a router’s perspective of the network, and an understanding of what foothold they have.”
Cisco’s alert concerned espionage attacks from China and Russia that abused vulnerabilities in aging, end-of-life network routers. But at a very important level, it doesn’t matter how or why the attackers got that initial foothold on your network.
It might be zero-day vulnerabilities in your network firewall or file-transfer appliance. Your more immediate and primary concern has to be: How quickly can you detect and detach that initial foothold?
The same tourist behavior that Cisco described attackers exhibiting vis-a-vis older routers is also incredibly common early on in ransomware and data ransom attacks — which often unfurl in secret over days or weeks as attackers methodically identify and compromise a victim’s key network assets.
These virtual hostage situations usually begin with the intruders purchasing access to the target’s network from dark web brokers who resell access to stolen credentials and compromised computers. As a result, when those stolen resources first get used by would-be data thieves, almost invariably the attackers will run a series of basic commands asking the local system to confirm exactly who and where they are on the victim’s network.
This fundamental reality about modern cyberattacks — that cybercriminals almost always orient themselves by “looking up” who and where they are upon entering a foreign network for the first time — forms the business model of an innovative security company called Thinkst, which gives away easy-to-use tripwires or “canaries” that can fire off an alert whenever all sorts of suspicious activity is witnessed.
“Many people have pointed out that there are a handful of commands that are overwhelmingly run by attackers on compromised hosts (and seldom ever by regular users/usage),” the Thinkst website explains. “Reliably alerting when a user on your code-sign server runs whoami.exe can mean the difference between catching a compromise in week-1 (before the attackers dig in) and learning about the attack on CNN.”
These canaries — or “canary tokens” — are meant to be embedded inside regular files, acting much like a web beacon or web bug that tracks when someone opens an email.
The Canary Tokens website from Thinkst Canary lists nearly two-dozen free customizable canaries.
“Imagine doing that, but for file reads, database queries, process executions or patterns in log files,” the Canary Tokens documentation explains. “Canarytokens does all this and more, letting you implant traps in your production systems rather than setting up separate honeypots.”
Thinkst operates alongside a burgeoning industry offering so-called “deception” or “honeypot” services — those designed to confuse, disrupt and entangle network intruders. But in an interview with KrebsOnSecurity, Thinkst founder and CEO Haroon Meer said most deception techniques involve some degree of hubris.
“Meaning, you’ll have deception teams in your network playing spy versus spy with people trying to break in, and it becomes this whole counterintelligence thing,” Meer said. “Nobody really has time for that. Instead, we are saying literally the opposite: That you’ve probably got all these [security improvement] projects that are going to take forever. But while you’re doing all that, just drop these 10 canaries, because everything else is going to take a long time to do.”
The idea here is to lay traps in sensitive areas of your network or web applications where few authorized users should ever trod. Importantly, the canary tokens themselves are useless to an attacker. For example, that AWS canary token sure looks like the digital keys to your cloud, but the token itself offers no access. It’s just a lure for the bad guys, and you get an alert when and if it is ever touched.
One nice thing about canary tokens is that Thinkst gives them away for free. Head over to canarytokens.org, and choose from a drop-down menu of available tokens, including:
-a web bug / URL token, designed to alert when a particular URL is visited;
-a DNS token, which alerts when a hostname is requested;
-an AWS token, which alerts when a specific Amazon Web Services key is used;
-a “custom exe” token, to alert when a specific Windows executable file or DLL is run;
-a “sensitive command” token, to alert when a suspicious Windows command is run.
-a Microsoft Excel/Word token, which alerts when a specific Excel or Word file is accessed.
Much like a “wet paint” sign often encourages people to touch a freshly painted surface anyway, attackers often can’t help themselves when they enter a foreign network and stumble upon what appear to be key digital assets, Meer says.
“If an attacker lands on your server and finds a key to your cloud environment, it’s really hard for them not to try it once,” Meer said. “Also, when these sorts of actors do land in a network, they have to orient themselves, and while doing that they are going to trip canaries.”
Meer says canary tokens are as likely to trip up attackers as they are “red teams,” security experts hired or employed by companies seeking to continuously probe their own computer systems and networks for security weaknesses.
“The concept and use of canary tokens has made me very hesitant to use credentials gained during an engagement, versus finding alternative means to an end goal,” wrote Shubham Shah, a penetration tester and co-founder of the security firm Assetnote. “If the aim is to increase the time taken for attackers, canary tokens work well.”
Thinkst makes money by selling Canary Tools, which are honeypots that emulate full blown systems like Windows servers or IBM mainframes. They deploy in minutes and include a personalized, private Canarytoken server.
“If you’ve got a sophisticated defense team, you can start putting these things in really interesting places,” Meer said. “Everyone says their stuff is simple, but we obsess over it. It’s really got to be so simple that people can’t mess it up. And if it works, it’s the best bang for your security buck you’re going to get.”
Further reading:
Dark Reading: Credential Canaries Create Minefield for Attackers
NCC Group: Extending a Thinkst Canary to Become an Interactive Honeypot
Cruise Automation’s experience deploying canary tokens
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.
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