StoneDrill_ntssrvr32_RID2EF7

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_ntssrvr32_RID2EF7 : APT DEMO EXE FILE MIDDLE_EAST {
   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 11:37:01"
      score = 75
      customer = "demo"
      license = "CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/"
      modified = "2023-01-20"
      hash1 = "394a7ebad5dfc13d6c75945a61063470dc3b68f7a207613b79ef000e1990909b"
      tags = "APT, DEMO, EXE, FILE, MIDDLE_EAST"
      minimum_yara = "3.5.0"
      
   strings:
      $s1 = "g\\system32\\" wide
      $s2 = "ztvttw" fullword wide
      $s3 = "lwizvm" fullword ascii
      $op1 = { 94 35 77 73 03 40 eb e9 } 
      $op2 = { 80 7c 41 01 00 74 0a 3d } 
      $op3 = { 74 0a 3d 00 94 35 77 } 
   condition: 
      ( uint16 ( 0 ) == 0x5a4d and filesize < 4000KB and 3 of them )
}

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

df958d7e-114b-41f6-99ae-39cc64c29814

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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.

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

[[ currentRule.title ]]

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