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MALPEDIA_Win_Unidentified_031_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-031-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_031_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "77de712f-509a-5bd9-ac06-6a495b0af267"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_031"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_031_auto.yar#L1-L133"
		license_url = "N/A"
		logic_hash = "9cca10a3297d9a7590bafcb743e4efb81d784e6f90c0ccf678132212f3cb6c5a"
		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 = { 8b0e 8d55e0 52 57 57 50 56 }
		$sequence_1 = { 8d5dc4 53 83ec10 8bdc 8913 8b9568ffffff 895304 }
		$sequence_2 = { 8d45c8 8d8d6cfeffff 50 51 ffd3 50 8d55b0 }
		$sequence_3 = { 7510 68???????? 68???????? ff15???????? 8b35???????? 8d8dc4feffff 51 }
		$sequence_4 = { 898500020000 53 8d8508020000 50 c7850402000010d01800 ffd6 6a70 }
		$sequence_5 = { 8b4604 b900000700 3bc1 7727 7441 3d00000200 743a }
		$sequence_6 = { 8bcf e8???????? 8945dc 50 8bce e8???????? 8bf8 }
		$sequence_7 = { 5a 899530ffffff be601b0001 8dbd34ffffff a5 a5 }
		$sequence_8 = { ab ab ab 8365f400 83c630 8bce c745f009000000 }
		$sequence_9 = { 53 ff30 ff75d4 e8???????? ff45d0 83c72c 8b45d0 }

	condition:
		7 of them and filesize < 1998848
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8b0e 8d55e0 52 57 57 50 56 }
$sequence_1hex{ 8d5dc4 53 83ec10 8bdc 8913 8b9568ffffff 895304 }
$sequence_2hex{ 8d45c8 8d8d6cfeffff 50 51 ffd3 50 8d55b0 }
$sequence_3hex{ 7510 68???????? 68???????? ff15???????? 8b35???????? 8d8dc4feffff 51 }
$sequence_4hex{ 898500020000 53 8d8508020000 50 c7850402000010d01800 ffd6 6a70 }
$sequence_5hex{ 8b4604 b900000700 3bc1 7727 7441 3d00000200 743a }
$sequence_6hex{ 8bcf e8???????? 8945dc 50 8bce e8???????? 8bf8 }
$sequence_7hex{ 5a 899530ffffff be601b0001 8dbd34ffffff a5 a5 }
$sequence_8hex{ ab ab ab 8365f400 83c630 8bce c745f009000000 }
$sequence_9hex{ 53 ff30 ff75d4 e8???????? ff45d0 83c72c 8b45d0 }

Condition

7 of them and filesize < 1998848

In plain words (Heuristic)

  • The file must be smaller than 1998848 (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: 77de712f-509a-5bd9-ac06-6a495b0af267

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