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MALPEDIA_Win_Lazarloader_Auto

autogenerated rule brought to you by yara-signator

MalwareLazarloaderMalpedia 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: Lazarloader.

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

Summary generated from the rule's metadata and condition.

Rule source

win-lazarloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Lazarloader_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "4eef2499-48c5-5b94-8dd0-29267a0265f8"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.lazarloader"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.lazarloader_auto.yar#L1-L119"
		license_url = "N/A"
		logic_hash = "176d7f7f65178334e7677ff59a660edd6b016ed103feffa239e5ccc53e031e90"
		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 = { 48894de8 488945f0 488d15a0bd0000 b805000000 894520 894528 }
		$sequence_1 = { 488bd7 4c8d05fecd0000 83e23f 488bcf }
		$sequence_2 = { 33c0 b906020000 f3aa 33c0 66898424d0060000 488d8424d2060000 488bf8 }
		$sequence_3 = { 488bc2 e9???????? 493bec 0f84be000000 8b7500 33c0 f04d0fb1bcf120ba0100 }
		$sequence_4 = { 4889842490000000 488b442470 0fb700 6689442432 488b442458 0fb74c2432 }
		$sequence_5 = { 4885c9 7430 53 4883ec20 488d0563810000 }
		$sequence_6 = { eb19 488d1dec1e0100 eb10 488d1df31e0100 eb07 488d1dd21e0100 }
		$sequence_7 = { 4883ec20 e8???????? 488b05???????? 488d1da7710100 }
		$sequence_8 = { e8???????? 89442460 33c9 e8???????? }
		$sequence_9 = { 85c0 750d 488bcb e8???????? e9???????? 4c8d2557230100 }

	condition:
		7 of them and filesize < 364544
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 48894de8 488945f0 488d15a0bd0000 b805000000 894520 894528 }
$sequence_1hex{ 488bd7 4c8d05fecd0000 83e23f 488bcf }
$sequence_2hex{ 33c0 b906020000 f3aa 33c0 66898424d0060000 488d8424d2060000 488bf8 }
$sequence_3hex{ 488bc2 e9???????? 493bec 0f84be000000 8b7500 33c0 f04d0fb1bcf120ba0100 }
$sequence_4hex{ 4889842490000000 488b442470 0fb700 6689442432 488b442458 0fb74c2432 }
$sequence_5hex{ 4885c9 7430 53 4883ec20 488d0563810000 }
$sequence_6hex{ eb19 488d1dec1e0100 eb10 488d1df31e0100 eb07 488d1dd21e0100 }
$sequence_7hex{ 4883ec20 e8???????? 488b05???????? 488d1da7710100 }
$sequence_8hex{ e8???????? 89442460 33c9 e8???????? }
$sequence_9hex{ 85c0 750d 488bcb e8???????? e9???????? 4c8d2557230100 }

Condition

7 of them and filesize < 364544

In plain words (Heuristic)

  • The file must be smaller than 364544 (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: 4eef2499-48c5-5b94-8dd0-29267a0265f8

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