APT_MagicHound_MalMacro

rule APT_MagicHound_MalMacro {
   meta:
      description = "Detects malicious macro / powershell in Office document"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://www.secureworks.com/blog/iranian-pupyrat-bites-middle-eastern-organizations"
      date = "2017-02-17"
      super_rule = 1
      hash1 = "66d24a529308d8ab7b27ddd43a6c2db84107b831257efb664044ec4437f9487b"
      hash2 = "e5b643cb6ec30d0d0b458e3f2800609f260a5f15c4ac66faf4ebf384f7976df6"
      id = "ad573f52-dbda-5852-ad73-9ef47dd6e7df"
   strings:
      $s1 = "powershell.exe " fullword ascii
      $s2 = "CommandButton1_Click" fullword ascii
      $s3 = "URLDownloadToFile" fullword ascii
   condition:
      ( uint16(0) == 0xcfd0 and filesize < 8000KB and all of them )
}