Empire_Invoke_SSHCommand

rule Empire_Invoke_SSHCommand {
   meta:
      description = "Detects Empire component - file Invoke-SSHCommand.ps1"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://github.com/adaptivethreat/Empire"
      date = "2016-11-05"
      hash1 = "cbaf086b14d5bb6a756cbda42943d4d7ef97f8277164ce1f7dd0a1843e9aa242"
      id = "b06b507f-b6b8-5f4b-8d6d-920f141e9ac1"
   strings:
      $s1 = "$Base64 = 'TVqQAAMAAAAEAAAA//8AALgAAAAAAAAAQAAAAAAAAAA" ascii
      $s2 = "Invoke-SSHCommand -ip 192.168.1.100 -Username root -Password test -Command \"id\"" fullword ascii
      $s3 = "Write-Verbose \"[*] Error loading dll\"" fullword ascii
   condition:
      ( uint16(0) == 0x660a and filesize < 2000KB and 1 of them ) or all of them
}