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MALPEDIA_Win_Unidentified_091_Auto

autogenerated rule brought to you by yara-signator

MalwareMalpedia 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

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

Summary generated from the rule's metadata and condition.

Rule source

win-unidentified-091-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_091_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "cf09f652-e969-58ee-9b4f-8afb50f512ed"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_091"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_091_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "a228d061a0a5a0cb3920e1fda0eaddb57b86d5516f29931565c9af29e9a8ece4"
		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 = { 89552c 44894550 4c8d14c1 44894530 4803c2 4c895520 c7455402000000 }
		$sequence_1 = { 8b542420 443bd3 0f8481000000 443bd2 0f82df000000 453bd3 0f83d6000000 }
		$sequence_2 = { ff15???????? 48898378040000 4883f8ff 742c c7837004000001000000 4885ff 744e }
		$sequence_3 = { 7593 b841000000 b9b6000000 ba6d000000 894c2420 4c8d0d366d1200 448bc0 }
		$sequence_4 = { e9???????? c6456807 816568fffeffff 0f57c0 f30f7f4570 4c89bd80000000 b910000000 }
		$sequence_5 = { 7511 c7442428c60c0000 8d5050 448d4810 eb69 41b901000000 4c8bc7 }
		$sequence_6 = { c744242801000000 488d0d028a1400 4c8bc3 89442420 e8???????? 4883c430 5b }
		$sequence_7 = { 8945a7 8945f3 8bc7 3345ab c1c00c 4403f0 418bd6 }
		$sequence_8 = { c3 ba50000000 c7442428d1010000 488d0568001300 41b8d5010000 488bcb 4889442420 }
		$sequence_9 = { 7415 41b8240b0000 488d1558971100 488bcb e8???????? 488b5c2430 b801000000 }

	condition:
		7 of them and filesize < 5777408
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 89552c 44894550 4c8d14c1 44894530 4803c2 4c895520 c7455402000000 }
$sequence_1hex{ 8b542420 443bd3 0f8481000000 443bd2 0f82df000000 453bd3 0f83d6000000 }
$sequence_2hex{ ff15???????? 48898378040000 4883f8ff 742c c7837004000001000000 4885ff 744e }
$sequence_3hex{ 7593 b841000000 b9b6000000 ba6d000000 894c2420 4c8d0d366d1200 448bc0 }
$sequence_4hex{ e9???????? c6456807 816568fffeffff 0f57c0 f30f7f4570 4c89bd80000000 b910000000 }
$sequence_5hex{ 7511 c7442428c60c0000 8d5050 448d4810 eb69 41b901000000 4c8bc7 }
$sequence_6hex{ c744242801000000 488d0d028a1400 4c8bc3 89442420 e8???????? 4883c430 5b }
$sequence_7hex{ 8945a7 8945f3 8bc7 3345ab c1c00c 4403f0 418bd6 }
$sequence_8hex{ c3 ba50000000 c7442428d1010000 488d0568001300 41b8d5010000 488bcb 4889442420 }
$sequence_9hex{ 7415 41b8240b0000 488d1558971100 488bcb e8???????? 488b5c2430 b801000000 }

Condition

7 of them and filesize < 5777408

In plain words (Heuristic)

  • The file must be smaller than 5777408 (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: cf09f652-e969-58ee-9b4f-8afb50f512ed

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