/*
   Yara Rule Set
   Author: Florian Roth
   Date: 2017-02-17
   Identifier: Magic Hound
*/

/* Rule Set ----------------------------------------------------------------- */

rule APT_PupyRAT_PY {
   meta:
      description = "Detects Pupy RAT"
      license = "https://creativecommons.org/licenses/by-nc/4.0/"
      author = "Florian Roth"
      reference = "https://www.secureworks.com/blog/iranian-pupyrat-bites-middle-eastern-organizations"
      date = "2017-02-17"
      hash1 = "8d89f53b0a6558d6bb9cdbc9f218ef699f3c87dd06bc03dd042290dedc18cb71"
   strings:
      $x1 = "reflective_inject_dll" fullword ascii
      $x2 = "ImportError: pupy builtin module not found !" fullword ascii
      $x3 = "please start pupy from either it's exe stub or it's reflective DLLR;" fullword ascii
      $x4 = "[INJECT] inject_dll." fullword ascii
      $x5 = "import base64,zlib;exec zlib.decompress(base64.b64decode('eJzzcQz1c/ZwDbJVT87Py0tNLlHnAgA56wXS'))" fullword ascii

      $op1 = { 8b 42 0c 8b 78 14 89 5c 24 18 89 7c 24 14 3b fd } /* Opcode */
   condition:
      ( uint16(0) == 0x5a4d and filesize < 20000KB and 1 of them ) or ( 2 of them )
}

/* Super Rules ------------------------------------------------------------- */

rule APT_MagicHound_MalMacro {
   meta:
      description = "Detects malicious macro / powershell in Office document"
      license = "https://creativecommons.org/licenses/by-nc/4.0/"
      author = "Florian Roth"
      reference = "https://www.secureworks.com/blog/iranian-pupyrat-bites-middle-eastern-organizations"
      date = "2017-02-17"
      super_rule = 1
      hash1 = "66d24a529308d8ab7b27ddd43a6c2db84107b831257efb664044ec4437f9487b"
      hash2 = "e5b643cb6ec30d0d0b458e3f2800609f260a5f15c4ac66faf4ebf384f7976df6"
   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 )
}