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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_SUSP_LNK_Suspicious_Folders_Jan25

Detects link files (.LNK) with suspicious folders mentioned in the target path

Suspicious / huntingSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
Florian Roth
Date
2025-01-24
Modified
2025-03-20
Score / Quality
65 / 85

What this rule detects

Detects link files (.LNK) with suspicious folders mentioned in the target path

It defines 2 patterns (2 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
susp-lnk-suspicious-folders-jan25.yarDetection Rule License 1.1
rule SIGNATURE_BASE_SUSP_LNK_Suspicious_Folders_Jan25 : FILE
{
	meta:
		description = "Detects link files (.LNK) with suspicious folders mentioned in the target path"
		author = "Florian Roth"
		id = "5f1bcd18-abec-5831-b24f-519c92a2454e"
		date = "2025-01-24"
		modified = "2025-03-20"
		reference = "Internal Research"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/mixed_open_source_export.yar#L2-L16"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "776adb706e165389d0abdf8d6f719f6db1ec6d2f3d9d96e1c4a5f2b55e482c31"
		score = 65
		quality = 85
		tags = "FILE"

	strings:
		$x1 = "RECYCLER.BIN\\" wide
		$x2 = "Perflogs\\" wide

	condition:
		uint16( 0 ) == 0x004c and 1 of them
}

Strings (2 patterns)

IdentifierTypeValueModifiers
$x1text"RECYCLER.BIN\\"wide
$x2text"Perflogs\\"wide

Condition

uint16( 0 ) == 0x004c and 1 of them

In plain words (Heuristic)

  • At least 1 patterns in the rule must match.

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Licence & attribution

Author: Florian Roth

Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a

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: 5f1bcd18-abec-5831-b24f-519c92a2454e

Tags:FILE

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