265. Hunting for Another Legitimate Tool Akira Uses for Exfiltration

Hello everyone!

Ransomware gangs have almost countless arsenal of legitimate tools, which help them to solve various problems and evade defenses. Let's look at another tool they use for Exfiltration to Cloud Storage (T1567.002).

And we'll look into the report on Akira ransomware. According to it, the gang leveraged the following legitimate tools for exfiltration:

  • WinSCP
  • FileZilla
  • Rclone
  • Bitvise SSH Client

The first three are quite common, and most likely already are in your threat hunting library. But what about the last one - Bitvise SSH Client? It may be an interesting target:

event_type: "processcreatewin"

AND

proc_file_productname: "Bitvise SSH Client"

See you tomorrow!

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