StoneDrill_Malware_2

rule StoneDrill_Malware_2 {
   meta:
      description = "Detects malware from StoneDrill threat report"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://securelist.com/blog/research/77725/from-shamoon-to-stonedrill/"
      date = "2017-03-07"
      hash1 = "69530d78c86031ce32583c6800f5ffc629acacb18aac4c8bb5b0e915fc4cc4db"
      id = "92f53e6a-8f49-5ffa-8c16-3ec3e6f2bdcd"
   strings:
      $s1 = "cmd /c WMIC Process Call Create \"C:\\Windows\\System32\\Wscript.exe //NOLOGO " fullword wide
      $s2 = "C:\\ProgramData\\InternetExplorer" fullword wide
      $s3 = "WshShell.CopyFile \"" fullword wide
      $s4 = "Abd891.tmp" fullword wide
      $s5 = "Set WshShell = Nothing" fullword wide
      $s6 = "AaCcdDeFfGhiKLlMmnNoOpPrRsSTtUuVvwWxyZz32" fullword ascii
      $s7 = "\\FileInfo.txt" wide

      $x1 = "C-PDI-C-Cpy-T.vbs" fullword wide
      $x2 = "C-Dlt-C-Org-T.vbs" fullword wide
      $x3 = "C-PDC-C-Cpy-T.vbs" fullword wide
      $x4 = "AC-PDC-C-Cpy-T.vbs" fullword wide
      $x5 = "C-Dlt-C-Trsh-T.tmp" fullword wide
   condition:
      ( uint16(0) == 0x5a4d and filesize < 700KB and ( 1 of ($x*) or 3 of ($s*) ) ) or 5 of them
}