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Freeenki_Infostealer_Nov17_Export_Sig_Testing

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

Detects Freenki infostealer malware

import "pe"
rule Freeenki_Infostealer_Nov17_Export_Sig_Testing {
   meta:
      description = "Detects Freenki infostealer malware"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "http://blog.talosintelligence.com/2017/11/ROKRAT-Reloaded.html"
      date = "2017-11-28"
      hash1 = "99c1b4887d96cb94f32b280c1039b3a7e39ad996859ffa6dd011cf3cca4f1ba5"
      id = "929f9d41-2e71-5a86-b12f-489355bdf88d"
   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 ]]

a60c5a32-8476-4814-8580-fbee46117e0f

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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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