Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Lockfile_Auto

autogenerated rule brought to you by yara-signator

MalwareLockfileMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Lockfile.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-lockfile-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Lockfile_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "bd2815c9-f0d4-5e6a-ac59-7f8b5622f6e2"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.lockfile"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.lockfile_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "8ee706fbef80f56d51cc417aea7b798f4101c5e772f6f45d61ddc8fb2a17000b"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 4881c488000000 c3 488d1520580600 488d4c2420 e8???????? 90 488d542420 }
		$sequence_1 = { 4983d100 48894120 488b4d50 498b4328 4f8d040a 48f721 4d8d1c00 }
		$sequence_2 = { 488d056aba0300 4889442420 488d4c2468 e8???????? 90 4c8d4718 488bd3 }
		$sequence_3 = { 4889542428 488955d8 4c8945e8 66660f1f840000000000 4c8921 4c896108 4c896110 }
		$sequence_4 = { 8b44243c c1e808 8944243c 0fb644243c c1e003 4898 488d0dff390700 }
		$sequence_5 = { 4c8d0de9e10400 4533c0 418d501a 488d4db7 e8???????? 0f1000 0f1145d7 }
		$sequence_6 = { 4c3b4597 4c8b458f 4883d700 483bc1 4983d000 493bd1 4c13c7 }
		$sequence_7 = { 48c1fa05 488bc2 48c1e83f 4803d0 488bca 48d1e9 488bc7 }
		$sequence_8 = { c645d64b c645d750 c645d83f c645d987 40887dda 0fb64580 0fb6440d80 }
		$sequence_9 = { 89442438 0fb6442438 488d0d6a320700 488d04c1 b901000000 486bc901 ba01000000 }

	condition:
		7 of them and filesize < 1163264
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 4881c488000000 c3 488d1520580600 488d4c2420 e8???????? 90 488d542420 }
$sequence_1hex{ 4983d100 48894120 488b4d50 498b4328 4f8d040a 48f721 4d8d1c00 }
$sequence_2hex{ 488d056aba0300 4889442420 488d4c2468 e8???????? 90 4c8d4718 488bd3 }
$sequence_3hex{ 4889542428 488955d8 4c8945e8 66660f1f840000000000 4c8921 4c896108 4c896110 }
$sequence_4hex{ 8b44243c c1e808 8944243c 0fb644243c c1e003 4898 488d0dff390700 }
$sequence_5hex{ 4c8d0de9e10400 4533c0 418d501a 488d4db7 e8???????? 0f1000 0f1145d7 }
$sequence_6hex{ 4c3b4597 4c8b458f 4883d700 483bc1 4983d000 493bd1 4c13c7 }
$sequence_7hex{ 48c1fa05 488bc2 48c1e83f 4803d0 488bca 48d1e9 488bc7 }
$sequence_8hex{ c645d64b c645d750 c645d83f c645d987 40887dda 0fb64580 0fb6440d80 }
$sequence_9hex{ 89442438 0fb6442438 488d0d6a320700 488d04c1 b901000000 486bc901 ba01000000 }

Condition

7 of them and filesize < 1163264

In plain words (Heuristic)

  • The file must be smaller than 1163264 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

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

Rule id: bd2815c9-f0d4-5e6a-ac59-7f8b5622f6e2

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE

More Lockfile rules