Fireball_de_svr

rule Fireball_de_svr {
   meta:
      description = "Detects Fireball malware - file de_svr.exe"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://goo.gl/4pTkGQ"
      date = "2017-06-02"
      hash1 = "f964a4b95d5c518fd56f06044af39a146d84b801d9472e022de4c929a5b8fdcc"
      id = "29395239-66d8-5340-b884-9b8f036cc27f"
   strings:
      $s1 = "cmd.exe /c MD " fullword ascii
      $s2 = "rundll32.exe \"%s\",%s" fullword wide
      $s3 = "http://d12zpbetgs1pco.cloudfront.net/Weatherapi/shell" fullword wide
      $s4 = "C:\\v3\\exe\\de_svr_inst.pdb" fullword ascii
      $s5 = "Internet Connect Failed!" fullword ascii
   condition:
      ( uint16(0) == 0x5a4d and filesize < 3000KB and 4 of them )
}