YARA · Malpedia signator rules
MALPEDIA_Win_Woody_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: Woody.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-woody-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Woody_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "66315f8b-2bbb-5197-a74a-1868f88ef27b"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.woody"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.woody_auto.yar#L1-L133"
= "N/A"
= "c73a64bbc8f596f95f70f6096e049e95fdba1190a98d908874b03f5b9cb274f5"
= 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 = { 8d4604 8d4d08 50 e8???????? 81c608010000 8d4d08 56 }
$sequence_1 = { 8bf0 e8???????? 84c0 750d 5f 5e 5d }
$sequence_2 = { ff15???????? 85c0 0f8550010000 b931000000 8d7c2429 88442428 c68424b801000000 }
$sequence_3 = { 8d842478010000 53 50 e8???????? 83c414 8d8c246c010000 68b4000000 }
$sequence_4 = { e8???????? 83c404 8d4c2410 6a00 51 6878150000 68b4b20110 }
$sequence_5 = { 890cd0 8b4dd0 8b55d4 03d1 8b4df4 8954c804 ff45f4 }
$sequence_6 = { 50 8d8520ffffff 50 8d45f0 50 53 }
$sequence_7 = { ffd3 83f8ff 740e 50 ff15???????? b007 e9???????? }
$sequence_8 = { 83c404 663bc3 7606 66a3???????? 8d9540ffffff 68e8ea0110 52 }
$sequence_9 = { 5b 81c470020000 c20400 8b442418 50 ff15???????? 5f }
condition:
7 of them and filesize < 409600
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8d4604 8d4d08 50 e8???????? 81c608010000 8d4d08 56 } | |
| $sequence_1 | hex | { 8bf0 e8???????? 84c0 750d 5f 5e 5d } | |
| $sequence_2 | hex | { ff15???????? 85c0 0f8550010000 b931000000 8d7c2429 88442428 c68424b801000000 } | |
| $sequence_3 | hex | { 8d842478010000 53 50 e8???????? 83c414 8d8c246c010000 68b4000000 } | |
| $sequence_4 | hex | { e8???????? 83c404 8d4c2410 6a00 51 6878150000 68b4b20110 } | |
| $sequence_5 | hex | { 890cd0 8b4dd0 8b55d4 03d1 8b4df4 8954c804 ff45f4 } | |
| $sequence_6 | hex | { 50 8d8520ffffff 50 8d45f0 50 53 } | |
| $sequence_7 | hex | { ffd3 83f8ff 740e 50 ff15???????? b007 e9???????? } | |
| $sequence_8 | hex | { 83c404 663bc3 7606 66a3???????? 8d9540ffffff 68e8ea0110 52 } | |
| $sequence_9 | hex | { 5b 81c470020000 c20400 8b442418 50 ff15???????? 5f } |
Condition
7 of them and filesize < 409600In plain words (Heuristic)
- The file must be smaller than 409600 (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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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: 66315f8b-2bbb-5197-a74a-1868f88ef27b
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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