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Showing posts with label Advanced persistent threat (APT). Show all posts

ClickFix Attacks: North Korea, Iran, Russia APT Groups Exploit Social Engineering for Espionage

ClickFix attacks are rapidly becoming a favored tactic among advanced persistent threat (APT) groups from North Korea, Iran, and Russia, particularly in recent cyber-espionage operations. This technique involves malicious websites posing as legitimate software or document-sharing platforms. Targets are enticed through phishing emails or malicious advertising and then confronted with fake error messages claiming a failed document download or access issue. 


To resolve the supposed problem, users are instructed to click a “Fix” button that directs them to run a PowerShell or command-line script. Executing this script allows malware to infiltrate their systems. Microsoft’s Threat Intelligence division highlighted earlier this year that the North Korean group ‘Kimsuky’ utilized a similar approach through a fake “device registration” page. 

A new report from Proofpoint now confirms that Kimsuky, along with Iran’s MuddyWater, Russia’s APT28, and the UNK_RemoteRogue group, deployed ClickFix techniques between late 2024 and early 2025. Kimsuky’s campaign, conducted between January and February 2025, specifically targeted think tanks involved in North Korean policy research. The attackers initially contacted victims using spoofed emails designed to appear as if they were sent by Japanese diplomats. After gaining trust, they provided malicious PDF attachments leading to a counterfeit secure drive. Victims were then asked to manually run a PowerShell command, which triggered the download of a second script that established persistence with scheduled tasks and installed QuasarRAT, all while distracting the victim with a harmless-looking PDF. 

In mid-November 2024, Iran’s MuddyWater launched its campaign, targeting 39 organizations across the Middle East. Victims received phishing emails disguised as urgent Microsoft security alerts, prompting them to run PowerShell scripts with administrative rights. This led to the deployment of ‘Level,’ a remote monitoring and management (RMM) tool used to conduct espionage activities. Meanwhile, Russian group UNK_RemoteRogue focused on two organizations tied to a leading arms manufacturer in December 2024. Attackers used compromised Zimbra servers to send fake Microsoft Office messages. Clicking the embedded links directed victims to fraudulent Microsoft Word pages featuring Russian-language instructions and a video tutorial. 

Victims executing the provided script unknowingly triggered JavaScript that ran PowerShell commands, connecting their systems to a server managed through the Empire C2 framework. Proofpoint also found that APT28, an infamous Russian cyber-espionage unit, used ClickFix tactics as early as October 2024. In that instance, phishing emails mimicked Google Spreadsheet notifications, including a fake reCAPTCHA and a prompt to execute PowerShell commands. Running these commands enabled attackers to create an SSH tunnel and activate Metasploit, providing them with covert access to compromised machines. 

The growing use of ClickFix attacks by multiple state-sponsored groups underscores the method’s effectiveness, primarily due to the widespread lack of caution when executing unfamiliar commands. To avoid falling victim, users should be extremely wary of running scripts or commands they do not recognize, particularly when asked to use elevated privileges.

Sandworm’s Evolving Cyber Threat: BadPilot Expands Global Reach

 

Sandworm, also known as Russia's Military Unit 74455 within the GRU, has established itself as one of the most notorious advanced persistent threats (APT). Its cyber operations have included NotPetya, the attack on the 2018 Winter Olympics, and two successful assaults on Ukraine’s power grid. More recent campaigns have targeted Denmark’s energy sector and attempted—both unsuccessfully and successfully—to disrupt Ukraine’s grid once again.

Recent developments indicate a shift in Sandworm’s tactics, moving toward quieter, more extensive intrusions. Microsoft, tracking the group under the name "Seashell Blizzard," has identified a specific subgroup within Unit 74455 that focuses exclusively on breaching high-value organizations. Dubbed "BadPilot," this subgroup has been executing opportunistic cyberattacks on Internet-facing infrastructure since at least late 2021, leveraging known vulnerabilities in widely used email and collaboration platforms.

Among the critical vulnerabilities exploited by BadPilot are Zimbra's CVE-2022-41352, Microsoft Exchange's CVE-2021-34473, and Microsoft Outlook's CVE-2023-23397. All three have received a severity score of 9.8 out of 10 under the Common Vulnerability Scoring System (CVSS), indicating their high impact.

BadPilot’s primary targets include telecommunications, oil and gas, shipping, arms manufacturing, and foreign government entities, spanning Ukraine, Europe, Central and South Asia, and the Middle East. Since early 2024, operations have expanded to the United States and the United Kingdom, with a particular focus on vulnerabilities in remote monitoring and management (RMM) software. Exploited vulnerabilities include CVE-2023-48788 in Fortinet Forticlient Enterprise Management Server (EMS) and CVE-2024-1709, a critical authentication bypass flaw in ScreenConnect by ConnectWise, rated a perfect 10 on the CVSS scale.

Upon breaching a system, BadPilot follows a systematic approach to maintain persistence and escalate its control. It deploys the custom "LocalOlive" Web shell and uses legitimate RMM tools under the name "ShadowLink" to configure compromised systems as Tor hidden services. The group collects credentials, moves laterally across networks, exfiltrates data, and engages in post-compromise activities.

“There is not a lack of sophistication here, but a focus on agility and obtaining goals,” says Sherrod DeGrippo, director of threat intelligence strategy at Microsoft. “These TTPs work because this threat actor is persistent and continues pursuing its objectives.”

BadPilot’s operations serve as a crucial enabler for Sandworm’s broader cyberattacks, aligning with Russia’s strategic objectives. Microsoft notes that "its compromises cumulatively offer Seashell Blizzard options when responding to Russia's evolving strategic objectives."

The subgroup emerged just months before Russia's invasion of Ukraine, actively contributing to cyberattacks aimed at organizations providing political or military support to Ukraine. Since 2023, BadPilot has facilitated at least three destructive attacks in the country.

Throughout the war, Sandworm has persistently targeted Ukraine’s critical infrastructure, including telecommunications, manufacturing, transportation, logistics, energy, water, and military organizations, as well as civilian support systems. Intelligence-gathering operations have also extended to military communities.

“These threat actors are persistent, creative, organized, and well-resourced,” DeGrippo emphasizes. To mitigate risks, "critical sectors need to ensure that they sustain above-average security practices, patch their software, monitor Internet-facing assets, and enhance their overall security posture."