YARA · Malpedia signator rules
MALPEDIA_Win_M0Yv_Auto
autogenerated rule brought to you by yara-signator
- 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:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "e8f21795-cde1-56af-8629-9b8b79ab48ca"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.m0yv"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.m0yv_auto.yar#L1-L130"
= "N/A"
= "9cffd172d9d16138c6b0d779b824ef7b29f6b82f72ce5c8491087921c282630d"
= 75
= 75
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "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)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 742e 403afe 731c 488b83b0000000 400fb6cf 8a0c01 } | |
| $sequence_1 | hex | { 243f 0c40 8844244f 488dac2440010000 4889e9 e8???????? 488d9c2470010000 } | |
| $sequence_2 | hex | { 83f802 7323 0fb6495c 488d159d110200 488b04c2 488b14c8 } | |
| $sequence_3 | hex | { 4c89e9 4809c1 4901fb 4c21f9 4c89ee 4821c6 } | |
| $sequence_4 | hex | { 4889f1 490fafcc 4d0faffd 4901cf 4c89f7 4c89f1 490fafca } | |
| $sequence_5 | hex | { 09c1 884a1c 4c89e0 48d1e8 88421d 4c89e0 48c1e809 } | |
| $sequence_6 | hex | { 48c1fe19 488b7c2440 4c8d0c3e 488d0c3e 4881c100000002 4889ce 48c1ee1a } | |
| $sequence_7 | hex | { e8???????? 4889f1 4c89f2 e8???????? 31db 4c8d7c2460 31ff } | |
| $sequence_8 | hex | { 66410fdbcf 660f76ca 660fdbcf 660fefcb 660fefcd 66410f6fd9 } | |
| $sequence_9 | hex | { 488d1529540200 4533c0 488d0c9b 488d0cca baa00f0000 e8???????? 85c0 } |
Condition
7 of them and filesize < 779264In 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.
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.
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)
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
| 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 |
Tags:FILE
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