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The Russian state-sponsored cyber espionage group known as Gamaredon has continued its digital onslaught against Ukraine, with recent attacks leveraging the popular messaging app Telegram to strike military and law enforcement sectors in the country.

“The Gamaredon group’s network infrastructure relies on multi-stage Telegram accounts for victim profiling and confirmation of geographic location, and then finally leads the victim to the next stage server for the final payload,” the BlackBerry Research and Intelligence Team said in a report shared with The Hacker News. “This kind of technique to infect target systems is new.”

Gamaredon, also known by names such as Actinium, Armageddon, Iron Tilden, Primitive Bear, Shuckworm, Trident Ursa, and Winterflounder, is known for its assaults aimed at Ukrainian entities since at least 2013.

Last month, Palo Alto Networks Unit 42 disclosed the threat actor’s unsuccessful attempts to break into an unnamed petroleum refining company within a NATO member state amid the Russo-Ukrainian war.

Attack chains mounted by the threat actor have employed legitimate Microsoft Office documents originating from Ukrainian government organizations as lures in spear-phishing emails to deliver malware capable of harvesting sensitive information.

images from Hacker News