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MALPEDIA_Win_Unidentified_039_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-039-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_039_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "bbf18cc6-6b35-5e87-a620-32ae448bbe18"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_039"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_039_auto.yar#L1-L129"
		license_url = "N/A"
		logic_hash = "bb1e4b36ca1712ed43f9b61b59fe4c28a338b7504abce5c057a5310aa88db898"
		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 = { 8b55e0 23ca 0bc1 8b4de4 0bc1 8945e8 8b45e0 }
		$sequence_1 = { 0fafc1 8b4d34 0fafc1 8b4d28 81e9700a0000 33c1 894530 }
		$sequence_2 = { 41 42 42 6685c0 75f1 5f 5e }
		$sequence_3 = { 59 8945e4 ff75fc 56 ff15???????? c745d8de330000 c745f4dd0b0000 }
		$sequence_4 = { 8b55e8 2bd1 8b4dec 23d1 8b4de4 0bc2 81f12d2a0000 }
		$sequence_5 = { 0bc1 8945d8 8b45f0 8b4df4 3bc8 7c0c }
		$sequence_6 = { c74598006b0000 c74594b7040000 c745902b270000 c74588777d0000 c7458c4d5c0000 }
		$sequence_7 = { c745e8f9580000 c745dc3f1a0000 c745d8ee2c0000 c745e4092b0000 8b45e4 0345d8 0345dc }
		$sequence_8 = { 8945a4 66c74475a66e00 c7459cf1300000 c7459c4d710000 8b459c 2d540f0000 }
		$sequence_9 = { 3505150000 0bc1 8945d0 8b45e0 8b4de4 3bc8 }

	condition:
		7 of them and filesize < 262144
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8b55e0 23ca 0bc1 8b4de4 0bc1 8945e8 8b45e0 }
$sequence_1hex{ 0fafc1 8b4d34 0fafc1 8b4d28 81e9700a0000 33c1 894530 }
$sequence_2hex{ 41 42 42 6685c0 75f1 5f 5e }
$sequence_3hex{ 59 8945e4 ff75fc 56 ff15???????? c745d8de330000 c745f4dd0b0000 }
$sequence_4hex{ 8b55e8 2bd1 8b4dec 23d1 8b4de4 0bc2 81f12d2a0000 }
$sequence_5hex{ 0bc1 8945d8 8b45f0 8b4df4 3bc8 7c0c }
$sequence_6hex{ c74598006b0000 c74594b7040000 c745902b270000 c74588777d0000 c7458c4d5c0000 }
$sequence_7hex{ c745e8f9580000 c745dc3f1a0000 c745d8ee2c0000 c745e4092b0000 8b45e4 0345d8 0345dc }
$sequence_8hex{ 8945a4 66c74475a66e00 c7459cf1300000 c7459c4d710000 8b459c 2d540f0000 }
$sequence_9hex{ 3505150000 0bc1 8945d0 8b45e0 8b4de4 3bc8 }

Condition

7 of them and filesize < 262144

In plain words (Heuristic)

  • The file must be smaller than 262144 (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: bbf18cc6-6b35-5e87-a620-32ae448bbe18

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