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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_MAL_RANSOM_Lockbit_Apr23_1

Detects indicators found in LockBit ransomware

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

What this rule detects

Detects indicators found in LockBit ransomware

Associated malware family: Lockbit.

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

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
mal-ransom-lockbit-apr23-1.yarDetection Rule License 1.1
rule SIGNATURE_BASE_MAL_RANSOM_Lockbit_Apr23_1
{
	meta:
		description = "Detects indicators found in LockBit ransomware"
		author = "Florian Roth"
		id = "75dc8b95-16f0-5170-a7d6-fc10bb778348"
		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#L43-L67"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "cd5bffa5571abfd1446b065d26c8c23f00fe1376d505af539c6f37356014a86f"
		score = 75
		quality = 85
		tags = ""

	strings:
		$xe1 = "-i '/path/to/crypt'" xor
		$xe2 = "http://lockbit" xor
		$s1 = "idelayinmin" ascii
		$s2 = "bVMDKmode" ascii
		$s3 = "bSelfRemove" ascii
		$s4 = "iSpotMaximum" ascii
		$fp1 = "<html"

	condition:
		(1 of ( $x* ) or 4 of them ) and not 1 of ( $fp* )
}

Strings (7 patterns)

IdentifierTypeValueModifiers
$xe1text"-i '/path/to/crypt'"xor
$xe2text"http://lockbit"xor
$s1text"idelayinmin"ascii
$s2text"bVMDKmode"ascii
$s3text"bSelfRemove"ascii
$s4text"iSpotMaximum"ascii
$fp1text"<html"

Condition

(1 of ( $x* ) or 4 of them ) and not 1 of ( $fp* )

In plain words (Heuristic)

  • At least 1 patterns in ( $x* ) must match.
  • At least 4 patterns in the rule must match.
  • At least 1 patterns in ( $fp* ) 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: 75dc8b95-16f0-5170-a7d6-fc10bb778348

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