Freeenki_Infostealer_Nov17_Export_Sig_Testing_RID38AF

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

Detects Freenki infostealer malware

import "pe"
rule Freeenki_Infostealer_Nov17_Export_Sig_Testing_RID38AF : DEMO EXE FILE MAL {
   meta:
      description = "Detects Freenki infostealer malware"
      author = "Florian Roth"
      reference = "http://blog.talosintelligence.com/2017/11/ROKRAT-Reloaded.html"
      date = "2017-11-28 18:31:41"
      score = 75
      customer = "demo"
      license = "CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/"
      hash1 = "99c1b4887d96cb94f32b280c1039b3a7e39ad996859ffa6dd011cf3cca4f1ba5"
      tags = "DEMO, EXE, FILE, MAL"
      required_modules = "pe"
      minimum_yara = "3.6.0"
      
   condition: 
      uint16 ( 0 ) == 0x5a4d and filesize < 3000KB and pe.exports ( "getUpdate" ) and pe.number_of_exports == 1
}

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

eed10dc6-e715-40fb-b565-b977112d17ae

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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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