Skip to content
yararules.org
Menu

YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_APT_APT29_NOBELIUM_Malware_May21_2

Detects malware used by APT29 / NOBELIUM

APT / threat actorSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
Florian Roth (Nextron Systems)
Date
2021-05-29
Modified
2025-03-21
Score / Quality
75 / 85

What this rule detects

Detects malware used by APT29 / NOBELIUM

It defines 3 patterns (0 text, 3 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
apt-apt29-nobelium-malware-may21-2.yarDetection Rule License 1.1
rule SIGNATURE_BASE_APT_APT29_NOBELIUM_Malware_May21_2 : FILE
{
	meta:
		description = "Detects malware used by APT29 / NOBELIUM"
		author = "Florian Roth (Nextron Systems)"
		id = "b1462b4b-227f-5aeb-92ea-bda6a86831c7"
		date = "2021-05-29"
		modified = "2025-03-21"
		reference = "https://www.microsoft.com/security/blog/2021/05/28/breaking-down-nobeliums-latest-early-stage-toolset/"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_apt29_nobelium_may21.yar#L236-L252"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		hash = "292e5b0a12fea4ff3fc02e1f98b7a370f88152ce71fe62670dd2f5edfaab2ff8"
		hash = "776014a63bf3cc7034bd5b6a9c36c75a930b59182fe232535bb7a305e539967b"
		logic_hash = "18a52f5fd71455b8564d4b485c233dd358a304bfddc5e6fb604b8e5a2a1949a3"
		score = 75
		quality = 85
		tags = "FILE"

	strings:
		$op1 = { 48 03 c8 42 0f b6 04 21 88 03 0f b6 43 01 8b c8 83 e0 0f 48 83 e1 f0 48 03 c8 }
		$op2 = { 48 03 c8 42 0f b6 04 21 88 43 01 41 0f b6 c7 8b c8 83 e0 0f 48 83 e1 f0 48 03 c8 }
		$op3 = { 45 0f b6 43 ff 41 8b c2 99 44 88 03 41 0f b6 2b 83 e2 03 03 c2 40 88 6b 01 }

	condition:
		filesize < 2200KB and all of them
}

Strings (3 patterns)

IdentifierTypeValueModifiers
$op1hex{ 48 03 c8 42 0f b6 04 21 88 03 0f b6 43 01 8b c8 83 e0 0f 48 83 e1 f0 48 03 c8 }
$op2hex{ 48 03 c8 42 0f b6 04 21 88 43 01 41 0f b6 c7 8b c8 83 e0 0f 48 83 e1 f0 48 03 c8 }
$op3hex{ 45 0f b6 43 ff 41 8b c2 99 44 88 03 41 0f b6 2b 83 e2 03 03 c2 40 88 6b 01 }

Condition

filesize < 2200KB and all of them

In plain words (Heuristic)

  • The file must be smaller than 2200KB (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

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

  • 292e5b0a12fea4ff3fc02e1f98b7a370f88152ce71fe62670dd2f5edfaab2ff8
  • 776014a63bf3cc7034bd5b6a9c36c75a930b59182fe232535bb7a305e539967b

Licence & attribution

Author: Florian Roth (Nextron Systems)

Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a

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: b1462b4b-227f-5aeb-92ea-bda6a86831c7

Tags:FILE

Related rules