YARA · SEKOIA.IO Community

SEKOIA_Apt_Redhotel_Maliciouslnk_Strings

Detects RedHotel's malicious LNKs

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

Author: Sekoia.io
Date: 2024-09-06
Modified: 2024-12-19
Score / Quality: 75 / 80

What this rule detects

Detects RedHotel's malicious LNKs

It defines 7 patterns (7 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

apt-redhotel-maliciouslnk-strings.yarDetection Rule License 1.1

rule SEKOIA_Apt_Redhotel_Maliciouslnk_Strings : FILE
{
	meta:
		description = "Detects RedHotel's malicious LNKs"
		author = "Sekoia.io"
		id = "df2f0002-7921-4378-a936-ea0de5fbfa5a"
		date = "2024-09-06"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_redhotel_maliciouslnk_strings.yar#L1-L25"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		hash = "8e2c17040ec78cbcdc07bb2cf9dd7e01"
		hash = "dc613a519e515ca817fdfb88f81fc9d7"
		hash = "6f7d85c196c277a6a619f6d94b8f69b9"
		hash = "b04d484d1e1d793b04af2a5fb88a8a57"
		logic_hash = "c1d64b3eca5961d7eaab82a6934299642a70301ef791493a371ae5a29376225f"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "desktop-" ascii
		$ = ".\\1.docx" wide
		$ = ".\\1.pdf" wide
		$ = ".\\1.doc" wide
		$ = ".\\1.ppt" wide
		$ = ".\\1.pptx" wide
		$ = "MACOS" wide

	condition:
		uint32be( 0 ) == 0x4c000000 and 3 of them
}

Strings (7 patterns)

Identifier	Type	Value	Modifiers
$	text	"desktop-"	ascii
$	text	".\\1.docx"	wide
$	text	".\\1.pdf"	wide
$	text	".\\1.doc"	wide
$	text	".\\1.ppt"	wide
$	text	".\\1.pptx"	wide
$	text	"MACOS"	wide

Condition

uint32be( 0 ) == 0x4c000000 and 3 of them

In plain words (Heuristic)

The file must start with the Windows shortcut (LNK) header.
At least 3 patterns in the rule must match.

Test this rule in your browser

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References

https://github.com/SEKOIA-IO/Community

Sample hashes

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

8e2c17040ec78cbcdc07bb2cf9dd7e01
dc613a519e515ca817fdfb88f81fc9d7
6f7d85c196c277a6a619f6d94b8f69b9
b04d484d1e1d793b04af2a5fb88a8a57

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: df2f0002-7921-4378-a936-ea0de5fbfa5a

Metadata

version	1.0
classification	TLP:CLEAR

Tags:FILE

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