YARA · WithSecure Labs IOCs

WITHSECURELABS_Andariel_Jelusrat_Plugin

Detects JelusRAT plugins

MalwareJelus RatWithSecure Labs IOCsBSD 2-Clause LicenseCompiles with YARA-X

Author: WithSecure
Date: 2026-01-22
Score / Quality: 75 / 75

What this rule detects

Detects JelusRAT plugins

Associated malware family: Jelus Rat.

Targets: Windows PE.

It has no patterns: the condition alone decides (modules, file properties or other rules). YARA modules used: pe.

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

Includes the imports needed to compile it on its own.

andariel-jelusrat-plugin.yarBSD 2-Clause License

import "pe"

rule WITHSECURELABS_Andariel_Jelusrat_Plugin
{
	meta:
		description = "Detects JelusRAT plugins"
		author = "WithSecure"
		id = "0ac026fa-ce23-5473-ac70-e08d70743b48"
		date = "2026-01-22"
		modified = "2026-01-22"
		reference = "https://github.com/WithSecureLabs/iocs"
		source_url = "https://github.com/WithSecureLabs/iocs/blob/1a8384468dd292c6d2c5114c32e42dc0da1f5ae1/Andariel2025/andariel.yara#L142-L152"
		license_url = "https://github.com/WithSecureLabs/iocs/blob/1a8384468dd292c6d2c5114c32e42dc0da1f5ae1/LICENSE"
		logic_hash = "4006238e639232a6f01db518fa666ae23600cbfb19746bddad991ac04011a87b"
		score = 75
		quality = 75
		tags = ""

	condition:
		pe.exports( "testPlugin" ) and pe.exports ( "beginPlugin" ) and pe.exports ( "endPlugin" ) and pe.exports ( "processCommand" )
}

Condition

pe.exports( "testPlugin" ) and pe.exports ( "beginPlugin" ) and pe.exports ( "endPlugin" ) and pe.exports ( "processCommand" )

In plain words (Heuristic)

Uses the pe module.
Checks exported functions or the DLL name.

Test this rule in your browser

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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

References

https://github.com/WithSecureLabs/iocs

Licence & attribution

Author: WithSecure

Source repository: WithSecure Labs IOCs @ 1a8384468d

Licence: BSD 2-Clause License (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 0ac026fa-ce23-5473-ac70-e08d70743b48

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