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MALPEDIA_Win_Lambert_Auto

autogenerated rule brought to you by yara-signator

MalwareLambertMalpedia 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: Lambert.

It defines 16 patterns (0 text, 16 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-lambert-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Lambert_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f7df9e01-4453-533c-813f-915aa9f6b16b"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.lambert"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.lambert_auto.yar#L1-L173"
		license_url = "N/A"
		logic_hash = "e962fdd46748b54901f5fa4e2a5bf76c62195e73f61927694baad41b7e26a417"
		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 = { 33d1 33da 8970f0 8958fc 8948f4 8950f8 5f }
		$sequence_1 = { 3b7d10 0f82bd000000 3bf9 0f83b5000000 2bd9 8d4602 3bd8 }
		$sequence_2 = { ebce 8b45f8 8be5 5d c20400 55 }
		$sequence_3 = { 05f0000000 832000 33f2 8b55e8 }
		$sequence_4 = { 0f8c1fffffff 8b07 8901 6a04 }
		$sequence_5 = { 83ec1c c745ec00000000 8b4508 8945f8 8b4df8 0fb711 81fa4d5a0000 }
		$sequence_6 = { 8b421c 8945f4 8b4df4 894df0 8b55f4 8b4220 }
		$sequence_7 = { 8b4d0c 8b5508 035124 8955f8 c745fc00000000 }
		$sequence_8 = { 8b55f8 c1e213 0bca 894df8 8b45fc 0fbe08 034df8 }
		$sequence_9 = { 3bd8 0f826f010000 8a07 8801 }
		$sequence_10 = { 0fb702 85c0 7428 8b4df8 }
		$sequence_11 = { 8b4d08 03481c 894de4 8b55f4 8b45e4 8b4d08 }
		$sequence_12 = { 3b7d10 724d 3bf9 7349 8bc3 2bc1 }
		$sequence_13 = { 0f8208010000 803a00 74e6 0fb602 }
		$sequence_14 = { 8955f4 8b45f4 50 e8???????? 8945e8 8b4de8 3b4d10 }
		$sequence_15 = { 03f8 4e 4e 8b1f 8919 2bf0 03c8 }

	condition:
		7 of them and filesize < 1205248
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 33d1 33da 8970f0 8958fc 8948f4 8950f8 5f }
$sequence_1hex{ 3b7d10 0f82bd000000 3bf9 0f83b5000000 2bd9 8d4602 3bd8 }
$sequence_2hex{ ebce 8b45f8 8be5 5d c20400 55 }
$sequence_3hex{ 05f0000000 832000 33f2 8b55e8 }
$sequence_4hex{ 0f8c1fffffff 8b07 8901 6a04 }
$sequence_5hex{ 83ec1c c745ec00000000 8b4508 8945f8 8b4df8 0fb711 81fa4d5a0000 }
$sequence_6hex{ 8b421c 8945f4 8b4df4 894df0 8b55f4 8b4220 }
$sequence_7hex{ 8b4d0c 8b5508 035124 8955f8 c745fc00000000 }
$sequence_8hex{ 8b55f8 c1e213 0bca 894df8 8b45fc 0fbe08 034df8 }
$sequence_9hex{ 3bd8 0f826f010000 8a07 8801 }
$sequence_10hex{ 0fb702 85c0 7428 8b4df8 }
$sequence_11hex{ 8b4d08 03481c 894de4 8b55f4 8b45e4 8b4d08 }
$sequence_12hex{ 3b7d10 724d 3bf9 7349 8bc3 2bc1 }
$sequence_13hex{ 0f8208010000 803a00 74e6 0fb602 }
$sequence_14hex{ 8955f4 8b45f4 50 e8???????? 8945e8 8b4de8 3b4d10 }
$sequence_15hex{ 03f8 4e 4e 8b1f 8919 2bf0 03c8 }

Condition

7 of them and filesize < 1205248

In plain words (Heuristic)

  • The file must be smaller than 1205248 (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: f7df9e01-4453-533c-813f-915aa9f6b16b

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