YARA · SEKOIA.IO Community

SEKOIA_Apt_Queueseed

Detects strings of Queueseed/Kapeka malware

APT / threat actorKapekaSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X

Author: Sekoia.io
Date: 2024-04-22
Modified: 2024-12-19
Score / Quality: 75 / 80

What this rule detects

Detects strings of Queueseed/Kapeka malware

Associated malware family: Kapeka.

Targets: Windows PE.

It defines 11 patterns (1 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

apt-queueseed.yarDetection Rule License 1.1

rule SEKOIA_Apt_Queueseed : FILE
{
	meta:
		description = "Detects strings of Queueseed/Kapeka malware"
		author = "Sekoia.io"
		id = "35f7ffd5-4f6f-4b31-8d60-c713a15d14e8"
		date = "2024-04-22"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_queueseed.yar#L1-L28"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "80d1135d63a351cabf45d2266c0ffc770e11669103107cd40caf00eb62c836ed"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = {2D 00 6F 00 00 00}
		$ = {2D 00 62 00 63 00 00 00}
		$ = {20 00 00 00 00 00 00 00}
		$ = {20 00 2D 00 77 00 00 00}
		$ = {35 00 3A 00 20 00 00 00}
		$ = {34 00 3A 00 20 00 00 00}
		$ = {33 00 3A 00 20 00 00 00}
		$ = {32 00 3A 00 20 00 00 00}
		$ = {31 00 3A 00 20 00 00 00}
		$ = {50 00 49 00 44 00 20 00 3A 00 20 00 00 00 00 00}
		$ = "ExitCode : " wide

	condition:
		uint16be( 0 ) == 0x4d5a and all of them and filesize < 200KB
}

Strings (11 patterns)

Identifier	Type	Value	Modifiers
$	hex	{2D 00 6F 00 00 00}
$	hex	{2D 00 62 00 63 00 00 00}
$	hex	{20 00 00 00 00 00 00 00}
$	hex	{20 00 2D 00 77 00 00 00}
$	hex	{35 00 3A 00 20 00 00 00}
$	hex	{34 00 3A 00 20 00 00 00}
$	hex	{33 00 3A 00 20 00 00 00}
$	hex	{32 00 3A 00 20 00 00 00}
$	hex	{31 00 3A 00 20 00 00 00}
$	hex	{50 00 49 00 44 00 20 00 3A 00 20 00 00 00 00 00}
$	text	"ExitCode : "	wide

Condition

uint16be( 0 ) == 0x4d5a and all of them and filesize < 200KB

In plain words (Heuristic)

The file must start with “MZ” — a Windows executable (PE).
The file must be smaller than 200KB (a cheap guard that skips large files).
All patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

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

Open in editor

References

https://github.com/SEKOIA-IO/Community

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: 35f7ffd5-4f6f-4b31-8d60-c713a15d14e8

Metadata

version	1.0
classification	TLP:CLEAR

Tags:FILE

MALPEDIA_Win_Kapeka_Auto
MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
SEKOIA_Apt_Gobrat_2
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-10
SEKOIA_Apt_Icepeony_Icecache
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-10-21
SEKOIA_Apt_Icepeony_Iceevent
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-10-21
SEKOIA_Apt_Kimsuky_Fpspy
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-27
SEKOIA_Apt_Kimsuky_Klogexe
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-27
SEKOIA_Apt_Kimsuky_Powershell
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-23
SEKOIA_Apt_Kimsuky_Powershell_Dropper_Strings
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-06-11