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SEKOIA_Rat_Win_Xeno_Rat

Xeno RAT is an open-source RAT, used by Kimsuky in January 2024

MalwareXenoratSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2024-02-09
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Xeno RAT is an open-source RAT, used by Kimsuky in January 2024

Associated malware family: Xenorat.

Targets: Windows PE.

It defines 2 patterns (2 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

rat-win-xeno-rat.yarDetection Rule License 1.1
rule SEKOIA_Rat_Win_Xeno_Rat : FILE
{
	meta:
		description = "Xeno RAT is an open-source RAT, used by Kimsuky in January 2024"
		author = "Sekoia.io"
		id = "4be1ff07-8180-42a8-9f51-b5e17bf23442"
		date = "2024-02-09"
		modified = "2024-12-19"
		reference = "https://github.com/moom825/xeno-rat/tree/main/xeno%20rat%20client"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/rat_win_xeno_rat.yar#L1-L17"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "252dd8b236ce3570b6df504d307d88ee7431c0eee361813f1d4f8a66ef1db703"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "Xeno-manager" wide
		$ = "moom825"

	condition:
		uint16( 0 ) == 0x5A4D and all of them
}

Strings (2 patterns)

IdentifierTypeValueModifiers
$text"Xeno-manager"wide
$text"moom825"

Condition

uint16( 0 ) == 0x5A4D and all of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • All patterns in the rule must match.

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References

Licence & attribution

Author: Sekoia.io

Source repository: SEKOIA.IO Community @ a438a5901a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

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

Rule id: 4be1ff07-8180-42a8-9f51-b5e17bf23442

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE