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MALPEDIA_Win_Unidentified_042_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-042-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_042_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "c75e52e9-dfdd-54d9-9fef-bcc12eba6502"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_042"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_042_auto.yar#L1-L132"
		license_url = "N/A"
		logic_hash = "04747e04bc8d0c9a49c029c2ad4b9af0895855ed01472136f24c3c48dd40b81e"
		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 = { 81e200ff0000 81e3000000ff 33cb 33ca 338ff0054300 83c704 3348d8 }
		$sequence_1 = { b8b9feffff 5e c3 66838e5202000001 b8ccfeffff 5e }
		$sequence_2 = { 8b4304 0fb708 03f1 83c40c c6043701 f6835202000010 7407 }
		$sequence_3 = { 6a01 6a16 51 52 53 8bd7 8bce }
		$sequence_4 = { c78570ffffff3af54fa5 c78574ffffff7f520e51 c78578ffffff8c68059b c7857cffffffabd9831f c7458019cde05b e8???????? 83c404 }
		$sequence_5 = { e8???????? 8be5 5d c3 3d14001500 75e4 8db5e2efffff }
		$sequence_6 = { 33d6 8955f8 33d1 035044 8d943a0c38e5fd 8b7df8 c1c217 }
		$sequence_7 = { 8bfe e8???????? 83c408 85c0 7881 8b03 8b7508 }
		$sequence_8 = { 33df 8bfe c1cf12 c1ce07 33fe 8bb5ccfeffff }
		$sequence_9 = { c78424f80100001f964e7f c78424fc010000d15d9ed8 c78424000200002872522d bb02000000 c78424040200001b02a94a c78424080200009753aab1 c784240c020000680f208c }

	condition:
		7 of them and filesize < 516096
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 81e200ff0000 81e3000000ff 33cb 33ca 338ff0054300 83c704 3348d8 }
$sequence_1hex{ b8b9feffff 5e c3 66838e5202000001 b8ccfeffff 5e }
$sequence_2hex{ 8b4304 0fb708 03f1 83c40c c6043701 f6835202000010 7407 }
$sequence_3hex{ 6a01 6a16 51 52 53 8bd7 8bce }
$sequence_4hex{ c78570ffffff3af54fa5 c78574ffffff7f520e51 c78578ffffff8c68059b c7857cffffffabd9831f c7458019cde05b e8???????? 83c404 }
$sequence_5hex{ e8???????? 8be5 5d c3 3d14001500 75e4 8db5e2efffff }
$sequence_6hex{ 33d6 8955f8 33d1 035044 8d943a0c38e5fd 8b7df8 c1c217 }
$sequence_7hex{ 8bfe e8???????? 83c408 85c0 7881 8b03 8b7508 }
$sequence_8hex{ 33df 8bfe c1cf12 c1ce07 33fe 8bb5ccfeffff }
$sequence_9hex{ c78424f80100001f964e7f c78424fc010000d15d9ed8 c78424000200002872522d bb02000000 c78424040200001b02a94a c78424080200009753aab1 c784240c020000680f208c }

Condition

7 of them and filesize < 516096

In plain words (Heuristic)

  • The file must be smaller than 516096 (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: c75e52e9-dfdd-54d9-9fef-bcc12eba6502

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