Russian cyber espionage actors affiliated with the Federal Security Service (FSB) have been observed using a USB propagating worm referred to as LitterDrifter in assaults targeting Ukrainian entities.
Look at Level, which thorough Gamaredon’s (aka Aqua Blizzard, Iron Tilden, Primitive Bear, Shuckworm, and Winterflounder) newest practices, branded the group as participating in big-scale strategies that are adopted by “facts selection attempts aimed at distinct targets, whose range is possible enthusiastic by espionage goals.”
The LitterDrifter worm packs in two primary characteristics: instantly spreading the malware by way of related USB drives as properly as communicating with the risk actor’s command-and-handle (C&C) servers. It is really also suspected to be an evolution of a PowerShell-centered USB worm that was earlier disclosed by Symantec in June 2023.
Penned in VBS, the spreader module is accountable for distributing the worm as a hidden file in a USB generate jointly with a decoy LNK that’s assigned random names. The malware will get its title LitterDrifter owing to the simple fact that the original orchestration component is named “trash.dll.”
“Gamaredon’s strategy to the C&C is somewhat unique, as it utilizes domains as a placeholder for the circulating IP addresses actually used as C2 servers,” Verify Level discussed.
LitterDrifter is also capable of connecting to a C&C server extracted from a Telegram channel, a tactic it has regularly place to use since at the very least the start off of the 12 months.
The cybersecurity organization explained it also detected symptoms of achievable an infection outside the house of Ukraine primarily based on VirusTotal submissions from the U.S., Vietnam, Chile, Poland, Germany, and Hong Kong.
Gamaredon has had an active presence this calendar year, even though constantly evolving its attack solutions. In July 2023, the adversary’s quick details exfiltration abilities came to light-weight, what with the danger actor transmitting delicate details inside of an hour of the first compromise.
“It truly is very clear that LitterDrifter was intended to guidance a huge-scale collection procedure,” the firm concluded. “It leverages easy, however successful methods to ensure it can access the widest feasible established of targets in the location.”
The development comes as Ukraine’s Countrywide Cybersecurity Coordination Center (NCSCC) disclosed attacks orchestrated by Russian point out-sponsored hackers concentrating on embassies across Europe, such as Italy, Greece, Romania, and Azerbaijan.
The intrusions, attributed to APT29 (aka BlueBravo, Cloaked Ursa, Cozy Bear, Iron Hemlock, Midnight Blizzard, and The Dukes), require the exploitation of the not long ago disclosed WinRAR vulnerability (CVE-2023-38831) through benign-looking lures that assert to present BMWs for sale, a topic it has employed in the earlier.
The attack chain commences with sending victims phishing e-mails made up of a url to a specially crafted ZIP file that, when released, exploits the flaw to retrieve a PowerShell script from a remote server hosted on Ngrok.
“A concerning craze of exploiting CVE-2023-38831 vulnerability by Russian intelligence companies hacking teams demonstrates its growing acceptance and sophistication,” NCSCC explained.
Earlier this week, the Computer system Emergency Reaction Crew of Ukraine (CERT-UA) unearthed a phishing marketing campaign that propagates destructive RAR archives that masquerades as a PDF document from the Security Support of Ukraine (SBU) but, in reality, is an executable that qualified prospects to the deployment of Remcos RAT.
CERT-UA is tracking the exercise less than the moniker UAC-0050, which was also connected to a further spate of cyber assaults aimed at point out authorities in the country to produce Remcos RAT in February 2023.
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