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MALPEDIA_Win_Lumar_Auto

autogenerated rule brought to you by yara-signator

MalwareLumarMalpedia 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: Lumar.

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

Summary generated from the rule's metadata and condition.

Rule source

win-lumar-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Lumar_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "e881dc92-d171-5105-bb07-ff98181ef78b"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.lumar"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.lumar_auto.yar#L1-L124"
		license_url = "N/A"
		logic_hash = "ea178313c43524fd7a7002575f589f09acf9805a9145d8f1811f2c4d6c208d78"
		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 = { 8d0441 8945f4 e9???????? 8b45b0 83e002 744c 837d0c03 }
		$sequence_1 = { 5f 5e 5b 5d c3 2bca 0fb702 }
		$sequence_2 = { 663b5dfc 0f8e08010000 83ea01 895518 0f84fc000000 8b4df4 0fbfc3 }
		$sequence_3 = { f7d8 1bc0 83c004 ebeb f60210 6a00 }
		$sequence_4 = { ffb7e4910000 8d55fc 51 53 6a02 56 8d8fac970000 }
		$sequence_5 = { 833c9600 74f9 ff0c96 8344960402 83ef01 79c4 5f }
		$sequence_6 = { 8b45ec 663b45fc 0f8e85010000 8b7508 8bce e8???????? }
		$sequence_7 = { 81feba499307 7432 81fe0f766ed2 742a }
		$sequence_8 = { 3bd0 7209 8bd0 4a }
		$sequence_9 = { 6a1b 59 66890d???????? 8d4877 eb52 }

	condition:
		7 of them and filesize < 81920
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8d0441 8945f4 e9???????? 8b45b0 83e002 744c 837d0c03 }
$sequence_1hex{ 5f 5e 5b 5d c3 2bca 0fb702 }
$sequence_2hex{ 663b5dfc 0f8e08010000 83ea01 895518 0f84fc000000 8b4df4 0fbfc3 }
$sequence_3hex{ f7d8 1bc0 83c004 ebeb f60210 6a00 }
$sequence_4hex{ ffb7e4910000 8d55fc 51 53 6a02 56 8d8fac970000 }
$sequence_5hex{ 833c9600 74f9 ff0c96 8344960402 83ef01 79c4 5f }
$sequence_6hex{ 8b45ec 663b45fc 0f8e85010000 8b7508 8bce e8???????? }
$sequence_7hex{ 81feba499307 7432 81fe0f766ed2 742a }
$sequence_8hex{ 3bd0 7209 8bd0 4a }
$sequence_9hex{ 6a1b 59 66890d???????? 8d4877 eb52 }

Condition

7 of them and filesize < 81920

In plain words (Heuristic)

  • The file must be smaller than 81920 (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: e881dc92-d171-5105-bb07-ff98181ef78b

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