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Argus v1.0 Ransomware (<Original Filename>.ARGUS)

  • Distribution Method : Unknown
  • MD5 : 668983cf8223a398f4b8a1a4d7cddb7a
  • Major Detection Name : a variant of MSIL/Filecoder.QE (ESET), Ransom_ARGUS.THAAABAH (Trend Micro)
  • Encrypted File Pattern : <Original Filename>.<Original Extension> → <Original Filename>.ARGUS
  • Malicious File Creation Location : C:\Users\%UserName%\audiodg.exe
  • Payment Instruction File : ARGUS-DECRYPT.html
  • Major Characteristics :
     - Offline Encryption
     - Titan Cryptor Ransomware series
     - Kraken Cryptor Ransomware impostor
     - Disable system restore (bcdedit.exe /set {default} recoveryenabled No, bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures, wbadmin.exe DELETE SYSTEMSTATEBACKUP, WMIC.exe SHADOWCOPY DELETE, vssadmin.exe delete shadows /All, wbadmin.exe DELETE BACKUP)
     - Utilizes SDelete from SysInternals to purge empty disc drive space, disabling possible recovery by file recovery tool. ("C:\Users\%UserName%\audiodg.exe" /accepteula -z <Drive Letter>:\)
     - Changes desktop background (C:\Users\%UserName%\AppData\Local\Temp\wallpaper.bmp)