clearlog

rule clearlog {
   meta:
      description = "Detects Fireball malware - file clearlog.dll"
      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 = "14093ce6d0fe8ab60963771f48937c669103842a0400b8d97f829b33c420f7e3"
      id = "3eb58a7a-b04d-52c2-8c3c-c149da8d4aa8"
   strings:
      $x1 = "\\ClearLog\\Release\\logC.pdb" ascii

      $s1 = "C:\\Windows\\System32\\cmd.exe /c \"\"" fullword wide
      $s2 = "logC.dll" fullword ascii
      $s3 = "hhhhh.exe" fullword wide
      $s4 = "ttttt.exe" fullword wide
      $s5 = "Logger Name:" fullword ascii
      $s6 = "cle.log.1" fullword wide
   condition:
      ( uint16(0) == 0x5a4d and filesize < 500KB and $x1 or 2 of them )
}