IsmDoor_Jul17_A2

rule IsmDoor_Jul17_A2 {
   meta:
      description = "Detects IsmDoor Malware"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://twitter.com/Voulnet/status/892104753295110145"
      date = "2017-08-01"
      hash1 = "be72c89efef5e59c4f815d2fce0da5a6fac8c90b86ee0e424868d4ae5e550a59"
      hash2 = "ea1be14eb474c9f70e498c764aaafc8b34173c80cac9a8b89156e9390bd87ba8"
      id = "ea72a496-cbc8-56f6-a852-7af9761ea58e"
   strings:
      $s1 = "powershell -exec bypass -file \"" fullword ascii
      $s2 = "PAQlFcaWUaFkVICEx2CkNCUUpGcA" ascii
      $s3 = "\\Documents" ascii
      $s4 = "\\Libraries" ascii
   condition:
      ( uint16(0) == 0x5a4d and filesize < 300KB and 3 of them )
}