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MALPEDIA_Win_Matanbuchus_Auto

autogenerated rule brought to you by yara-signator

MalwareMatanbuchusMalpedia 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

Associated malware family: Matanbuchus.

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

Summary generated from the rule's metadata and condition.

Rule source

win-matanbuchus-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Matanbuchus_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f28221c1-680b-5d58-8277-30f46067656d"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.matanbuchus"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.matanbuchus_auto.yar#L1-L127"
		license_url = "N/A"
		logic_hash = "2997d28aa1e71c96eb8b8db5aef2af7562f30f6f0a2b4697d1174ed6be704bc6"
		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 = { 0f84a6000000 8b4df4 8b5104 83ea08 d1ea 8955e4 }
		$sequence_1 = { 55 8bec 833d????????00 7517 8b450c 50 8b4d08 }
		$sequence_2 = { 6bc200 8b4d08 0fbe1401 33550c }
		$sequence_3 = { 8b511c 035508 8955d4 8b45f0 8b4df0 8b5018 3b5114 }
		$sequence_4 = { 8b55ec 837a7400 7507 33c0 e9???????? b808000000 6bc800 }
		$sequence_5 = { 8b55d4 8b048a 034508 8945d0 0fb74df4 0fb755f8 }
		$sequence_6 = { 0fb7044a 8b4df4 0fb75110 03c2 668945fc 0fb745fc 8b4df4 }
		$sequence_7 = { 034224 8945d0 8b4df4 8b5508 035120 8955dc 8b45f4 }
		$sequence_8 = { 8b4224 034508 8945d8 8b4df0 8b511c 035508 }
		$sequence_9 = { eb04 33c0 eb18 eb82 8b4df4 8b55f4 }

	condition:
		7 of them and filesize < 13077504
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 0f84a6000000 8b4df4 8b5104 83ea08 d1ea 8955e4 }
$sequence_1hex{ 55 8bec 833d????????00 7517 8b450c 50 8b4d08 }
$sequence_2hex{ 6bc200 8b4d08 0fbe1401 33550c }
$sequence_3hex{ 8b511c 035508 8955d4 8b45f0 8b4df0 8b5018 3b5114 }
$sequence_4hex{ 8b55ec 837a7400 7507 33c0 e9???????? b808000000 6bc800 }
$sequence_5hex{ 8b55d4 8b048a 034508 8945d0 0fb74df4 0fb755f8 }
$sequence_6hex{ 0fb7044a 8b4df4 0fb75110 03c2 668945fc 0fb745fc 8b4df4 }
$sequence_7hex{ 034224 8945d0 8b4df4 8b5508 035120 8955dc 8b45f4 }
$sequence_8hex{ 8b4224 034508 8945d8 8b4df0 8b511c 035508 }
$sequence_9hex{ eb04 33c0 eb18 eb82 8b4df4 8b55f4 }

Condition

7 of them and filesize < 13077504

In plain words (Heuristic)

  • The file must be smaller than 13077504 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

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: f28221c1-680b-5d58-8277-30f46067656d

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