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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_MAL_SUSP_RANSOM_Lockbit_Ransomnote_Feb24

Detects the LockBit ransom note file 'LockBit-DECRYPT.txt' which is a sign of a LockBit ransomware infection

MalwareLockbitSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
Florian Roth
Date
2024-02-23
Modified
2024-04-24
Score / Quality
75 / 85

What this rule detects

Detects the LockBit ransom note file 'LockBit-DECRYPT.txt' which is a sign of a LockBit ransomware infection

Associated malware family: Lockbit.

It defines 1 patterns (1 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

mal-susp-ransom-lockbit-ransomnote-feb24.yarDetection Rule License 1.1
rule SIGNATURE_BASE_MAL_SUSP_RANSOM_Lockbit_Ransomnote_Feb24
{
	meta:
		description = "Detects the LockBit ransom note file 'LockBit-DECRYPT.txt' which is a sign of a LockBit ransomware infection"
		author = "Florian Roth"
		id = "b2fcb2a7-49e8-520c-944f-6acd5ded579b"
		date = "2024-02-23"
		modified = "2024-04-24"
		reference = "https://www.huntress.com/blog/slashandgrab-screen-connect-post-exploitation-in-the-wild-cve-2024-1709-cve-2024-1708"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/expl_connectwise_screenconnect_vuln_feb24.yar#L137-L149"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "1fe07c33de1971b1f9430851dec4b8cd9f3ac7f087f0de18a2da4a390891b674"
		score = 75
		quality = 85
		tags = ""

	strings:
		$x1 = ">>>> Your personal DECRYPTION ID:"

	condition:
		1 of them
}

Strings (1 patterns)

IdentifierTypeValueModifiers
$x1text">>>> Your personal DECRYPTION ID:"

Condition

1 of them

In plain words (Heuristic)

  • At least 1 patterns in the rule must match.

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References

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: b2fcb2a7-49e8-520c-944f-6acd5ded579b

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