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KHRAT_Malware

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

Detects an Imphash of KHRAT malware

import "pe"
rule KHRAT_Malware {
   meta:
      description = "Detects an Imphash of KHRAT malware"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://researchcenter.paloaltonetworks.com/2017/08/unit42-updated-khrat-malware-used-in-cambodia-attacks/"
      date = "2017-08-31"
      hash1 = "53e27fd13f26462a58fa5587ecd244cab4da23aa80cf0ed6eb5ee9f9de2688c1"
      id = "3e6a5aca-9898-5864-8974-ca4adf272893"
   condition:
      uint16(0) == 0x5a4d and filesize < 100KB and pe.imphash() == "6a8478ad861f98f8428a042f74de1944"
}

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

c073dcb4-1b38-4684-8b71-cad906b4021a

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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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