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SEKOIA_Apt_Mustangpanda_Downloader

Detects the MustangPanda Downloader

APT / threat actorSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2022-03-02
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects the MustangPanda Downloader

Targets: Windows PE.

It defines 4 patterns (4 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

apt-mustangpanda-downloader.yarDetection Rule License 1.1
rule SEKOIA_Apt_Mustangpanda_Downloader : FILE
{
	meta:
		description = "Detects the MustangPanda Downloader"
		author = "Sekoia.io"
		id = "54850ffd-f93b-4082-b3ca-8e1d60b35422"
		date = "2022-03-02"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_mustangpanda_downloader.yar#L1-L19"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "0bff0ee2960ecfa29939720e7efacaa35359f4fe555ae160c674efebf29bf61e"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "Windows Api" wide nocase
		$ = "200 OK" wide
		$ = "200 ok" wide
		$ = "mscoree.dll" wide

	condition:
		uint16be( 0 ) == 0x4d5a and all of them
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$text"Windows Api"wide nocase
$text"200 OK"wide
$text"200 ok"wide
$text"mscoree.dll"wide

Condition

uint16be( 0 ) == 0x4d5a 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.

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.

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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: 54850ffd-f93b-4082-b3ca-8e1d60b35422

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE