Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Nailao_Locker_Auto

autogenerated rule brought to you by yara-signator

MalwareNailao LockerMalpedia 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: Nailao Locker.

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

Summary generated from the rule's metadata and condition.

Rule source

win-nailao-locker-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Nailao_Locker_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f4c7e8c8-8aa6-5e33-a918-59530a460f83"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.nailao_locker"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.nailao_locker_auto.yar#L1-L124"
		license_url = "N/A"
		logic_hash = "f78b85817e2074b7551f2d50266d0de829d714ef0f0e69cc60951820f6d3314c"
		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 = { 488b45d8 488908 488d0d99560100 488b45d8 8990a8030000 }
		$sequence_1 = { 8a4118 4188440830 4881ff01010000 7ce8 488d05043d0100 482bd8 4a8d0c0a }
		$sequence_2 = { 4b8b84eb100e0200 420fb64cf83e 460fbea41910d90100 41ffc4 418bc4 2bc2 8945af }
		$sequence_3 = { 488d4c2460 ff15???????? 48894340 4885c0 7508 ff15???????? eb08 }
		$sequence_4 = { e8???????? 4889442450 488d9570010000 0f57c0 }
		$sequence_5 = { 4889442450 488d0d00760100 0f57c0 488905???????? }
		$sequence_6 = { e8???????? 33d2 488d7b0c 0fb7c2 4c8d0d2a3c0100 48895304 4c8bc3 }
		$sequence_7 = { 443935???????? eb0d 6683fb03 7509 443935???????? 755b }
		$sequence_8 = { ff15???????? 3d04010000 7c0a b8ce000000 e9???????? 48899c2400030000 }
		$sequence_9 = { 33d2 488d7b0c 0fb7c2 4c8d0d2a3c0100 48895304 4c8bc3 48899320020000 }

	condition:
		7 of them and filesize < 512000
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 488b45d8 488908 488d0d99560100 488b45d8 8990a8030000 }
$sequence_1hex{ 8a4118 4188440830 4881ff01010000 7ce8 488d05043d0100 482bd8 4a8d0c0a }
$sequence_2hex{ 4b8b84eb100e0200 420fb64cf83e 460fbea41910d90100 41ffc4 418bc4 2bc2 8945af }
$sequence_3hex{ 488d4c2460 ff15???????? 48894340 4885c0 7508 ff15???????? eb08 }
$sequence_4hex{ e8???????? 4889442450 488d9570010000 0f57c0 }
$sequence_5hex{ 4889442450 488d0d00760100 0f57c0 488905???????? }
$sequence_6hex{ e8???????? 33d2 488d7b0c 0fb7c2 4c8d0d2a3c0100 48895304 4c8bc3 }
$sequence_7hex{ 443935???????? eb0d 6683fb03 7509 443935???????? 755b }
$sequence_8hex{ ff15???????? 3d04010000 7c0a b8ce000000 e9???????? 48899c2400030000 }
$sequence_9hex{ 33d2 488d7b0c 0fb7c2 4c8d0d2a3c0100 48895304 4c8bc3 48899320020000 }

Condition

7 of them and filesize < 512000

In plain words (Heuristic)

  • The file must be smaller than 512000 (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: f4c7e8c8-8aa6-5e33-a918-59530a460f83

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