Skip to content

YARA · SEKOIA.IO Community

SEKOIA_Apt_Cloudatlas_Powershower_Module

Detects CloudAtlas PowerShower module

APT / threat actorSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2022-11-30
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects CloudAtlas PowerShower module

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

Summary generated from the rule's metadata and condition.

Rule source

apt-cloudatlas-powershower-module.yarDetection Rule License 1.1
rule SEKOIA_Apt_Cloudatlas_Powershower_Module : FILE
{
	meta:
		description = "Detects CloudAtlas PowerShower module"
		author = "Sekoia.io"
		id = "dd688058-3d5d-46a7-8380-fe961c3327cd"
		date = "2022-11-30"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_cloudatlas_powershower_module.yar#L1-L18"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "7542eb882ee44203d806ad936126be2476b6e3a85ad8c93b6fd6c8226fe82617"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "$env:temp" ascii wide
		$ = "foreach($item in $zip.items" ascii wide
		$ = "echo $result" ascii wide
		$ = "pass.txt" ascii wide

	condition:
		all of them and filesize < 10000
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$text"$env:temp"ascii wide
$text"foreach($item in $zip.items"ascii wide
$text"echo $result"ascii wide
$text"pass.txt"ascii wide

Condition

all of them and filesize < 10000

In plain words (Heuristic)

  • The file must be smaller than 10000 (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

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: dd688058-3d5d-46a7-8380-fe961c3327cd

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE