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YARA · CAPE Sandbox (CAPEv2)

CAPE_Lockbit

Lockbit Payload

MalwareLockbitCAPE Sandbox (CAPEv2)GNU General Public License v3.0Compiles with YARA-X
Author
kevoreilly
Date
2020-05-14
Modified
2022-06-09
Score / Quality
75 / 70

What this rule detects

Lockbit Payload

Associated malware family: Lockbit.

Targets: Windows PE.

It defines 5 patterns (2 text, 3 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
lockbit.yarGNU General Public License v3.0
rule CAPE_Lockbit : FILE
{
	meta:
		description = "Lockbit Payload"
		author = "kevoreilly"
		id = "ec9b4fec-0233-5277-b922-07057c2b4b34"
		date = "2020-05-14"
		modified = "2022-06-09"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/data/yara/CAPE/Lockbit.yar#L1-L15"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		logic_hash = "80ab705c8246a0bd5b3de65146cf32b102f39bf9444bdf1d366b5a794c1229b9"
		score = 75
		quality = 70
		tags = "FILE"
		cape_type = "Lockbit Payload"

	strings:
		$string1 = "/C ping 127.0.0.7 -n 3 > Nul & fsutil file setZeroData offset=0 length=524288 \"%s\" & Del /f /q \"%s\"" wide
		$string2 = "Ransom" ascii wide
		$crypto = {8B 4D 08 C1 E9 10 0F B6 D1 8B 4D 0C C1 E9 08 0F B6 C9 8B 14 95 [4] 8B 7D FC 33 14 8D [4] 8B CF C1 E9 18 33 14 8D [4] 0F B6 CB 33 14 8D [4] 8B CF 33 10}
		$decode1 = {8A ?4 34 ?C 0? 00 00 8B 8? 24 ?8 0? 00 00 0F BE ?? 0F BE C? 33 ?? 88 ?? 34 ?? 0? 00 00 46 83 FE 0? 72 DD}
		$decode2 = {8A 44 24 ?? 30 44 0C ?? 41 83 F9 ?? 72 F2}

	condition:
		uint16( 0 ) == 0x5A4D and ( 2 of them )
}

Strings (5 patterns)

IdentifierTypeValueModifiers
$string1text"/C ping 127.0.0.7 -n 3 > Nul & fsutil file setZeroData offset=0 length=524288 \"%s\" & Del /f /q \"%s\""wide
$string2text"Ransom"ascii wide
$cryptohex{8B 4D 08 C1 E9 10 0F B6 D1 8B 4D 0C C1 E9 08 0F B6 C9 8B 14 95 [4] 8B 7D FC 33 14 8D [4] 8B CF C1 E9 18 33 14 8D [4] 0F B6 CB 33 14 8D [4] 8B CF 33 10}
$decode1hex{8A ?4 34 ?C 0? 00 00 8B 8? 24 ?8 0? 00 00 0F BE ?? 0F BE C? 33 ?? 88 ?? 34 ?? 0? 00 00 46 83 FE 0? 72 DD}
$decode2hex{8A 44 24 ?? 30 44 0C ?? 41 83 F9 ?? 72 F2}

Condition

uint16( 0 ) == 0x5A4D and ( 2 of them )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 2 patterns in the rule must match.

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References

Licence & attribution

Author: kevoreilly

Source repository: CAPE Sandbox (CAPEv2) @ 6b15e76f28

Licence: GNU General Public License v3.0 (repository licence)

Copyright notice: Cuckoo Sandbox is copyrighted by the Cuckoo Foundation.

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: ec9b4fec-0233-5277-b922-07057c2b4b34

Metadata

cape_typeLockbit Payload

Tags:FILE

Related rules

More Lockbit rules