CobaltGang_Malware_Aug17_1

rule CobaltGang_Malware_Aug17_1 {
   meta:
      description = "Detects a Cobalt Gang malware"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://sslbl.abuse.ch/intel/6ece5ece4192683d2d84e25b0ba7e04f9cb7eb7c"
      date = "2017-08-09"
      hash1 = "6d70673b723f338b3febc9f1d69463bdd4775539cb92b5a5d8fccc0d977fa2f0"
      id = "56c6f4f8-ccf5-5665-ac21-67f0a9b67cf1"
   strings:
      $s1 = "ServerSocket.EXE" fullword wide
      $s2 = "Incorrect version of WS2_32.dll found" fullword ascii
      $s3 = "Click 'Connect' to Connect to the Server.  'Disconnect' to disconnect from server." fullword wide
      $s4 = "Click 'Start' to start the Server.  'Stop' to Stop it." fullword wide
   condition:
      ( uint16(0) == 0x5a4d and filesize < 400KB and 3 of them )
}