The financially motivated FIN11, which increasingly incorporated CL0P ransomware into their operations in 2020, appeared to rely on low-effort volume techniques like spamming malware for initial entry, but put a substantial amount of effort into each follow-up compromise.

“Several of their recent ransom notes explicitly name data stolen from workstations that belong to top executives (including founders/CEOs) of the respective enterprises,” Senior Cybersecurity Analyst Thomas Barabosch wrote in a blog post detailing new research from Deutsche Telekom. “This is likely based on the hope that using data stolen from top executives in the extortion process raises their chances that the victim pays.”

The research sheds new light on how cybercriminals from the threat group, described as a relentless, big game ransomware hunter that rarely goes more than a day or two between attacks, used the popular clop ransomware in their exploitations.

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