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TurlaMosquito_Mal_5

YARA detection rule by Florian Roth (Nextron Systems) · Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE

Detects malware sample from Turla Mosquito report

import "pe"
rule TurlaMosquito_Mal_5 {
   meta:
      description = "Detects malware sample from Turla Mosquito report"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://www.welivesecurity.com/wp-content/uploads/2018/01/ESET_Turla_Mosquito.pdf"
      date = "2018-02-22"
      hash1 = "26a1a42bc74e14887616f9d6048c17b1b4231466716a6426e7162426e1a08030"
      id = "9f3a35c9-b0f0-5ca6-8b34-19e2d45305f2"
   condition:
      uint16(0) == 0x5a4d and filesize < 300KB and pe.imphash() == "ac40cf7479f53a4754ac6481a4f24e57"
}

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

d980f363-b493-4de5-8078-f6ea383c6419

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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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