YARA · Malpedia signator rules
MALPEDIA_Win_Yarat_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: Yarat.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-yarat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Yarat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "63e758ee-e47a-5b6d-9f31-91407ed4d575"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.yarat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.yarat_auto.yar#L1-L134"
= "N/A"
= "6cc12e2858c68d08ba1de7d1ffb11d2d35640e8a6b2fe791f291535d676fe1a6"
= 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 = { 8bc8 83be1c01000002 7515 83f814 7410 68???????? 56 }
$sequence_1 = { 8b8dc4feffff 51 8b4108 894634 a1???????? 8b4040 ffd0 }
$sequence_2 = { c1e81f 03c2 8d5518 894518 69c0e8030000 2bc8 69c1e8030000 }
$sequence_3 = { c645fc08 8bc8 83781410 7202 8b08 83781004 7534 }
$sequence_4 = { f9 81c504000000 33c3 f8 c1c003 48 6681fd2a15 }
$sequence_5 = { 8d45d4 50 6819270000 57 e8???????? 68???????? 682c4e0000 }
$sequence_6 = { 8b4dc8 8b45e4 0b45dc 7528 8bc1 0bc2 7522 }
$sequence_7 = { 8b7508 8bc2 c1e804 2401 88868e0d0000 f6c210 7406 }
$sequence_8 = { 8bf8 83c40c 85ff 0f8527020000 83bdd8feffff00 7529 68???????? }
$sequence_9 = { 8b4510 85c0 8b4d0c 8b5514 53 8b5d08 56 }
condition:
7 of them and filesize < 8692736
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8bc8 83be1c01000002 7515 83f814 7410 68???????? 56 } | |
| $sequence_1 | hex | { 8b8dc4feffff 51 8b4108 894634 a1???????? 8b4040 ffd0 } | |
| $sequence_2 | hex | { c1e81f 03c2 8d5518 894518 69c0e8030000 2bc8 69c1e8030000 } | |
| $sequence_3 | hex | { c645fc08 8bc8 83781410 7202 8b08 83781004 7534 } | |
| $sequence_4 | hex | { f9 81c504000000 33c3 f8 c1c003 48 6681fd2a15 } | |
| $sequence_5 | hex | { 8d45d4 50 6819270000 57 e8???????? 68???????? 682c4e0000 } | |
| $sequence_6 | hex | { 8b4dc8 8b45e4 0b45dc 7528 8bc1 0bc2 7522 } | |
| $sequence_7 | hex | { 8b7508 8bc2 c1e804 2401 88868e0d0000 f6c210 7406 } | |
| $sequence_8 | hex | { 8bf8 83c40c 85ff 0f8527020000 83bdd8feffff00 7529 68???????? } | |
| $sequence_9 | hex | { 8b4510 85c0 8b4d0c 8b5514 53 8b5d08 56 } |
Condition
7 of them and filesize < 8692736In plain words (Heuristic)
- The file must be smaller than 8692736 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
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: 63e758ee-e47a-5b6d-9f31-91407ed4d575
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
Related rules
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04