Skip to content

YARA · SEKOIA.IO Community

SEKOIA_Storm_1811_Files_Dat

Detects files used in a campaign performed by the intrusion set Storm-1811

GenericSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2024-06-10
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects files used in a campaign performed by the intrusion set Storm-1811

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

Summary generated from the rule's metadata and condition.

Rule source

storm-1811-files-dat.yarDetection Rule License 1.1
rule SEKOIA_Storm_1811_Files_Dat
{
	meta:
		description = "Detects files used in a campaign performed by the intrusion set Storm-1811"
		author = "Sekoia.io"
		id = "8b14f276-0c39-422b-9b19-d96b139a7ae8"
		date = "2024-06-10"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/storm_1811_files_dat.yar#L1-L24"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "d1d5b76671cefe8b876ca8df50205a04ebbcd973f115919b901f6a7946492904"
		score = 75
		quality = 80
		tags = ""
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "RuntimeBroker" ascii fullword
		$s2 = "InstallSpamFilters" ascii fullword
		$s3 = "newfile333.txt" ascii fullword
		$s4 = "Installing spam filter kb_outlook" ascii fullword
		$s5 = "s.zip" ascii fullword
		$s6 = "Update completed" ascii fullword
		$s7 = "Updates installed" ascii fullword
		$s8 = "update_log.tgz uploaded ok" ascii fullword
		$s9 = "HKCU\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run" ascii fullword
		$s10 = "runtimebroker_connect" ascii fullword

	condition:
		5 of them
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$s1text"RuntimeBroker"ascii fullword
$s2text"InstallSpamFilters"ascii fullword
$s3text"newfile333.txt"ascii fullword
$s4text"Installing spam filter kb_outlook"ascii fullword
$s5text"s.zip"ascii fullword
$s6text"Update completed"ascii fullword
$s7text"Updates installed"ascii fullword
$s8text"update_log.tgz uploaded ok"ascii fullword
$s9text"HKCU\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run"ascii fullword
$s10text"runtimebroker_connect"ascii fullword

Condition

5 of them

In plain words (Heuristic)

  • At least 5 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: 8b14f276-0c39-422b-9b19-d96b139a7ae8

Metadata

version1.0
classificationTLP:CLEAR