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Ransomware Group

Pysa

Mespinosa is a ransomware which encrypts file using an asymmetric encryption and adds .pysa as file extension. According to dissectingmalware the extension "pysa" is probably derived from the Zanzibari Coin with the same name.

Known victims309

Threat level

HIGH

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Tactics, Techniques & Procedures (TTPs)

CredentialTheft

  • Mimikatz
  • ProcDump
  • SessionGopher

DiscoveryEnum

  • ADRecon
  • Advanced IP Scanner
  • Advanced Port Scanner

Exfiltration

  • FileZilla
  • WinSCP

LOLBAS

  • PsExec
  • WMIC

Offsec

  • Chashell
  • Koadic
  • PowerShell Empire
  • PowerSploit

Known infrastructure

The following Tor hidden services have been associated with this group:

  • Pysa's Partners

These sites are malicious. Open them only from an isolated environment.

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