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MALPEDIA_Win_Bqtlock_Auto

autogenerated rule brought to you by yara-signator

MalwareBqtlockMalpedia 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: Bqtlock.

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

Summary generated from the rule's metadata and condition.

Rule source

win-bqtlock-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Bqtlock_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "a487119a-e7ca-5338-8f6e-4bc772de2ab2"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.bqtlock"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.bqtlock_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "3551b5a08b9fb2b57803a409650d4a5f2efcf5d251961b29f758577d6968c250"
		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 = { 837c2460ff 742b 410fb64720 31db 41bcffffffff e9???????? 31d2 }
		$sequence_1 = { 4c894c2450 48897c2448 f6411801 0f85e6000000 4889842480000000 488d8424d4000000 4c8d842490000000 }
		$sequence_2 = { 4d8b5908 4c8b8424b8000000 4c8b8c24c0000000 488b06 4889442468 488b02 4889cb }
		$sequence_3 = { 4c0f44d8 e9???????? 498b4510 493b4518 0f83d0030000 0fb700 6683f8ff }
		$sequence_4 = { e8???????? 488b8424f0000000 498d5520 488d8c2480010000 4889842468010000 e8???????? 4c89fa }
		$sequence_5 = { 4c8b48e8 4901d9 4d89c8 4183ff20 0f85ccfeffff 418b5120 85d2 }
		$sequence_6 = { e8???????? 488945f8 488b45f8 483b4518 7320 0fbe4d20 488b4518 }
		$sequence_7 = { 83e0df 83f845 0f8505e6ffff c744245800000000 4189dd 4531f6 c744244401000000 }
		$sequence_8 = { 498b4510 493b4518 0f8332010000 66662e0f1f840000000000 0f1f4000 440fb708 664183f9ff }
		$sequence_9 = { 488d442460 4889442428 e8???????? 8b542460 85d2 7521 488b3d???????? }

	condition:
		7 of them and filesize < 4444160
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 837c2460ff 742b 410fb64720 31db 41bcffffffff e9???????? 31d2 }
$sequence_1hex{ 4c894c2450 48897c2448 f6411801 0f85e6000000 4889842480000000 488d8424d4000000 4c8d842490000000 }
$sequence_2hex{ 4d8b5908 4c8b8424b8000000 4c8b8c24c0000000 488b06 4889442468 488b02 4889cb }
$sequence_3hex{ 4c0f44d8 e9???????? 498b4510 493b4518 0f83d0030000 0fb700 6683f8ff }
$sequence_4hex{ e8???????? 488b8424f0000000 498d5520 488d8c2480010000 4889842468010000 e8???????? 4c89fa }
$sequence_5hex{ 4c8b48e8 4901d9 4d89c8 4183ff20 0f85ccfeffff 418b5120 85d2 }
$sequence_6hex{ e8???????? 488945f8 488b45f8 483b4518 7320 0fbe4d20 488b4518 }
$sequence_7hex{ 83e0df 83f845 0f8505e6ffff c744245800000000 4189dd 4531f6 c744244401000000 }
$sequence_8hex{ 498b4510 493b4518 0f8332010000 66662e0f1f840000000000 0f1f4000 440fb708 664183f9ff }
$sequence_9hex{ 488d442460 4889442428 e8???????? 8b542460 85d2 7521 488b3d???????? }

Condition

7 of them and filesize < 4444160

In plain words (Heuristic)

  • The file must be smaller than 4444160 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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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: a487119a-e7ca-5338-8f6e-4bc772de2ab2

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