TopHat_Malware_Jan18_1

rule TopHat_Malware_Jan18_1 {
   meta:
      description = "Detects malware from TopHat campaign"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://researchcenter.paloaltonetworks.com/2018/01/unit42-the-tophat-campaign-attacks-within-the-middle-east-region-using-popular-third-party-services/#appendix"
      date = "2018-01-29"
      hash1 = "5c0b253966befd57f4d22548f01116ffa367d027f162514c1b043a747bead596"
      hash2 = "1f9bca1d5ce5d14d478d32f105b3ab5d15e1c520bde5dfca22324262e84d4eaf"
      id = "ec290eee-a21e-548d-b7cc-3e25e7c39d22"
   strings:
      $s1 = "WINMGMTS:\\\\.\\ROOT\\CIMV2" fullword ascii
      $s2 = "UENCRYPTION" fullword ascii
      $s3 = "TEXPORTAPIS" fullword ascii
      $s4 = "tcustommemorystream" fullword ascii
      $s5 = "tmemorystream" fullword ascii
      $s6 = "ExtrasNoteCONSOLEemb" fullword ascii
      $s7 = "DIALOG INCLUDE" fullword ascii
   condition:
      uint16(0) == 0x5a4d and filesize < 400KB and (
        pe.imphash() == "c221006b240b1c993217bd61e5ee31b6" or
        6 of them
      )
}