YARA · Malpedia signator rules
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:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "f28221c1-680b-5d58-8277-30f46067656d"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.matanbuchus"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.matanbuchus_auto.yar#L1-L127"
= "N/A"
= "2997d28aa1e71c96eb8b8db5aef2af7562f30f6f0a2b4697d1174ed6be704bc6"
= 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 = { 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)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 0f84a6000000 8b4df4 8b5104 83ea08 d1ea 8955e4 } | |
| $sequence_1 | hex | { 55 8bec 833d????????00 7517 8b450c 50 8b4d08 } | |
| $sequence_2 | hex | { 6bc200 8b4d08 0fbe1401 33550c } | |
| $sequence_3 | hex | { 8b511c 035508 8955d4 8b45f0 8b4df0 8b5018 3b5114 } | |
| $sequence_4 | hex | { 8b55ec 837a7400 7507 33c0 e9???????? b808000000 6bc800 } | |
| $sequence_5 | hex | { 8b55d4 8b048a 034508 8945d0 0fb74df4 0fb755f8 } | |
| $sequence_6 | hex | { 0fb7044a 8b4df4 0fb75110 03c2 668945fc 0fb745fc 8b4df4 } | |
| $sequence_7 | hex | { 034224 8945d0 8b4df4 8b5508 035120 8955dc 8b45f4 } | |
| $sequence_8 | hex | { 8b4224 034508 8945d8 8b4df0 8b511c 035508 } | |
| $sequence_9 | hex | { eb04 33c0 eb18 eb82 8b4df4 8b55f4 } |
Condition
7 of them and filesize < 13077504In 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.
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: f28221c1-680b-5d58-8277-30f46067656d
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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