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MALPEDIA_Win_Unidentified_104_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-104-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_104_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "aad3c8e5-d3ed-53bc-9ae8-94bd65d40828"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_104"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_104_auto.yar#L1-L127"
		license_url = "N/A"
		logic_hash = "9445de52bf7e66acf56781027aa78bcec480facad21f4cf8d849d071ba92e136"
		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 = { 4c8bf2 e8???????? ba20000000 498bce 488bf0 ff15???????? 84c0 }
		$sequence_1 = { 4c8b0424 488bf1 48c1ee3f 488d0409 4833f0 498b8298000000 4903c3 }
		$sequence_2 = { 48895c2408 57 4883ec20 488d1d33620100 488d3d2c620100 eb12 488b03 }
		$sequence_3 = { eb10 4c8d8de0010000 488bd3 e8???????? }
		$sequence_4 = { 4d85c0 0f84a7000000 488bc4 48895808 48896810 48897018 48897820 }
		$sequence_5 = { 488b442410 490fafc6 4801842428010000 49634004 480faf442440 4801842428010000 }
		$sequence_6 = { 4c8b6918 4489542468 8b4304 4c8d0cc0 }
		$sequence_7 = { 4c03f8 41897c2408 488b7c2438 4189742414 488b742430 498d8f00000002 41895c2418 }
		$sequence_8 = { 0f8423030000 488d8530040000 4889442420 4533c9 4533c0 418bd6 488b4c2448 }
		$sequence_9 = { 48c1ea20 4833d3 498b9ba8000000 4803c2 4c33f0 48898424a0000000 498bce }

	condition:
		7 of them and filesize < 263168
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 4c8bf2 e8???????? ba20000000 498bce 488bf0 ff15???????? 84c0 }
$sequence_1hex{ 4c8b0424 488bf1 48c1ee3f 488d0409 4833f0 498b8298000000 4903c3 }
$sequence_2hex{ 48895c2408 57 4883ec20 488d1d33620100 488d3d2c620100 eb12 488b03 }
$sequence_3hex{ eb10 4c8d8de0010000 488bd3 e8???????? }
$sequence_4hex{ 4d85c0 0f84a7000000 488bc4 48895808 48896810 48897018 48897820 }
$sequence_5hex{ 488b442410 490fafc6 4801842428010000 49634004 480faf442440 4801842428010000 }
$sequence_6hex{ 4c8b6918 4489542468 8b4304 4c8d0cc0 }
$sequence_7hex{ 4c03f8 41897c2408 488b7c2438 4189742414 488b742430 498d8f00000002 41895c2418 }
$sequence_8hex{ 0f8423030000 488d8530040000 4889442420 4533c9 4533c0 418bd6 488b4c2448 }
$sequence_9hex{ 48c1ea20 4833d3 498b9ba8000000 4803c2 4c33f0 48898424a0000000 498bce }

Condition

7 of them and filesize < 263168

In plain words (Heuristic)

  • The file must be smaller than 263168 (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: aad3c8e5-d3ed-53bc-9ae8-94bd65d40828

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