YARA · SEKOIA.IO Community

SEKOIA_Apt_Micdown_Encrypted_Configuration

Encrypted C2 configuration of micDown

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

Author: Sekoia.io
Date: 2023-08-24
Modified: 2024-12-19
Score / Quality: 75 / 80

What this rule detects

Encrypted C2 configuration of micDown

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

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

apt-micdown-encrypted-configuration.yarDetection Rule License 1.1

rule SEKOIA_Apt_Micdown_Encrypted_Configuration : FILE
{
	meta:
		description = "Encrypted C2 configuration of micDown"
		author = "Sekoia.io"
		id = "9567d68b-05d1-4d41-b87f-c8691ee689cd"
		date = "2023-08-24"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_micdown_encrypted_configuration.yar#L1-L15"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "9b80bd284f9aa9e4073bdead7bb0c5412ec1809c36a85dfd35d9ea7ac62da8a3"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = {?? [20] 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 84 36}

	condition:
		filesize == 66 and all of them
}

Strings (1 patterns)

Identifier	Type	Value	Modifiers
$s1	hex	{?? [20] 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 84 36}

Condition

filesize == 66 and all of them

In plain words (Heuristic)

All patterns in the rule must match.

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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: 9567d68b-05d1-4d41-b87f-c8691ee689cd

Metadata

version	1.0
classification	TLP:CLEAR

Tags:FILE

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