Tuesday, December 7, 2021

TA505 exploits SolarWinds Serv-U vulnerability (CVE-2021-35211) for initial access

NCC Group’s global Cyber Incident Response Team has observed an increase in Clop ransomware victims in the past weeks. The surge can be traced back to a vulnerability in SolarWinds Serv-U that is being abused by the TA505 threat actor. TA505 is a known cybercrime threat actor, who is known for extortion attacks using the Clop ransomware. We believe exploiting such vulnerabilities is a recent initial access technique for TA505, deviating from the actor’s usual phishing-based approach.

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