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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_MAL_RANSOM_Lockbit_Forensicartifacts_Apr23_1

Detects forensic artifacts found in LockBit intrusions

MalwareLockbitSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X (with warnings)
Author
Florian Roth
Date
2023-04-17
Modified
2023-12-05
Score / Quality
75 / 85

What this rule detects

Detects forensic artifacts found in LockBit intrusions

Associated malware family: Lockbit.

It defines 3 patterns (2 text, 1 hex, 0 regex).

YARA-X says: warning[text_as_hex]: hex pattern could be written as text literal

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
mal-ransom-lockbit-forensicartifacts-apr23-1.yarDetection Rule License 1.1
rule SIGNATURE_BASE_MAL_RANSOM_Lockbit_Forensicartifacts_Apr23_1
{
	meta:
		description = "Detects forensic artifacts found in LockBit intrusions"
		author = "Florian Roth"
		id = "e716030c-ee78-51dc-919c-cf59e93da976"
		date = "2023-04-17"
		modified = "2023-12-05"
		reference = "https://objective-see.org/blog/blog_0x75.html"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/mal_lockbit_lnx_macos_apr23.yar#L86-L101"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "81021f8c9aed17c007d7329a598c644a706fa9750818c8974984eefcba8d06c2"
		score = 75
		quality = 85
		tags = ""

	strings:
		$x1 = "/tmp/locker.log" ascii fullword
		$x2 = "Executable=LockBit/locker_" ascii
		$xc1 = { 54 6F 72 20 42 72 6F 77 73 65 72 20 4C 69 6E 6B 73 3A 0D 0A 68 74 74 70 3A 2F 2F 6C 6F 63 6B 62 69 74 }

	condition:
		1 of ( $x* )
}

Strings (3 patterns)

IdentifierTypeValueModifiers
$x1text"/tmp/locker.log"ascii fullword
$x2text"Executable=LockBit/locker_"ascii
$xc1hex{ 54 6F 72 20 42 72 6F 77 73 65 72 20 4C 69 6E 6B 73 3A 0D 0A 68 74 74 70 3A 2F 2F 6C 6F 63 6B 62 69 74 }

Condition

1 of ( $x* )

In plain words (Heuristic)

  • At least 1 patterns in ( $x* ) 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: e716030c-ee78-51dc-919c-cf59e93da976

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