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MALPEDIA_Win_M0Yv_Auto

autogenerated rule brought to you by yara-signator

MalwareM0YvMalpedia 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: M0Yv.

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

Summary generated from the rule's metadata and condition.

Rule source

win-m0yv-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_M0Yv_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "e8f21795-cde1-56af-8629-9b8b79ab48ca"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.m0yv"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.m0yv_auto.yar#L1-L130"
		license_url = "N/A"
		logic_hash = "9cffd172d9d16138c6b0d779b824ef7b29f6b82f72ce5c8491087921c282630d"
		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 = { 742e 403afe 731c 488b83b0000000 400fb6cf 8a0c01 }
		$sequence_1 = { 243f 0c40 8844244f 488dac2440010000 4889e9 e8???????? 488d9c2470010000 }
		$sequence_2 = { 83f802 7323 0fb6495c 488d159d110200 488b04c2 488b14c8 }
		$sequence_3 = { 4c89e9 4809c1 4901fb 4c21f9 4c89ee 4821c6 }
		$sequence_4 = { 4889f1 490fafcc 4d0faffd 4901cf 4c89f7 4c89f1 490fafca }
		$sequence_5 = { 09c1 884a1c 4c89e0 48d1e8 88421d 4c89e0 48c1e809 }
		$sequence_6 = { 48c1fe19 488b7c2440 4c8d0c3e 488d0c3e 4881c100000002 4889ce 48c1ee1a }
		$sequence_7 = { e8???????? 4889f1 4c89f2 e8???????? 31db 4c8d7c2460 31ff }
		$sequence_8 = { 66410fdbcf 660f76ca 660fdbcf 660fefcb 660fefcd 66410f6fd9 }
		$sequence_9 = { 488d1529540200 4533c0 488d0c9b 488d0cca baa00f0000 e8???????? 85c0 }

	condition:
		7 of them and filesize < 779264
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 742e 403afe 731c 488b83b0000000 400fb6cf 8a0c01 }
$sequence_1hex{ 243f 0c40 8844244f 488dac2440010000 4889e9 e8???????? 488d9c2470010000 }
$sequence_2hex{ 83f802 7323 0fb6495c 488d159d110200 488b04c2 488b14c8 }
$sequence_3hex{ 4c89e9 4809c1 4901fb 4c21f9 4c89ee 4821c6 }
$sequence_4hex{ 4889f1 490fafcc 4d0faffd 4901cf 4c89f7 4c89f1 490fafca }
$sequence_5hex{ 09c1 884a1c 4c89e0 48d1e8 88421d 4c89e0 48c1e809 }
$sequence_6hex{ 48c1fe19 488b7c2440 4c8d0c3e 488d0c3e 4881c100000002 4889ce 48c1ee1a }
$sequence_7hex{ e8???????? 4889f1 4c89f2 e8???????? 31db 4c8d7c2460 31ff }
$sequence_8hex{ 66410fdbcf 660f76ca 660fdbcf 660fefcb 660fefcd 66410f6fd9 }
$sequence_9hex{ 488d1529540200 4533c0 488d0c9b 488d0cca baa00f0000 e8???????? 85c0 }

Condition

7 of them and filesize < 779264

In plain words (Heuristic)

  • The file must be smaller than 779264 (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: e8f21795-cde1-56af-8629-9b8b79ab48ca

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