StoneDrill_Malware_2_RID2ECA

YARA detection rule by Florian Roth · CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/

Detects malware from StoneDrill threat report

rule StoneDrill_Malware_2_RID2ECA : APT DEMO EXE MIDDLE_EAST T1047 {
   meta:
      description = "Detects malware from StoneDrill threat report"
      author = "Florian Roth"
      reference = "https://securelist.com/blog/research/77725/from-shamoon-to-stonedrill/"
      date = "2017-03-07 11:29:31"
      score = 75
      customer = "demo"
      license = "CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/"
      hash1 = "69530d78c86031ce32583c6800f5ffc629acacb18aac4c8bb5b0e915fc4cc4db"
      tags = "APT, DEMO, EXE, MIDDLE_EAST, T1047"
      minimum_yara = "3.5.0"
      
   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
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

5d36e0e2-05f7-48e0-a930-e9f813e28f38

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

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Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

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[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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