YARA · Malpedia signator rules
MALPEDIA_Win_Woodyrat_Auto
autogenerated rule brought to you by yara-signator
MalwareWoodyratMalpedia 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: Woodyrat.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-woodyrat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Woodyrat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "2d5f6ac3-96e3-5256-bc78-54c79df807f1"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.woodyrat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.woodyrat_auto.yar#L1-L133"
= "N/A"
= "4fd5b7d584093599c052d873ff587647494e2e99699b5fe7a4a91f3b84030d17"
= 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 = { 8d4dec e8???????? 83ec18 8d4598 8bcc 50 }
$sequence_1 = { d9ec d9c9 d9f1 833d????????00 0f855c74ffff 8d0db00c4500 ba1b000000 }
$sequence_2 = { c7466800000000 c7466c07000000 8b4670 8b4e74 894770 894f74 8b4678 }
$sequence_3 = { c7461000000000 c746140f000000 c60600 8b7d1c 8d4d08 8b5508 8d5d08 }
$sequence_4 = { 3bca 7322 8d4101 894310 8bc3 83fa08 7202 }
$sequence_5 = { 50 8bce e8???????? 50 8d45d0 c645fc02 50 }
$sequence_6 = { e8???????? 8b45ec 83c408 84c0 8d4508 7479 8b551c }
$sequence_7 = { 2bc2 8d8da4fdffff d1f8 50 8d85e0fdffff 50 e8???????? }
$sequence_8 = { 6a00 56 c645fc01 e8???????? 83c410 8bce e8???????? }
$sequence_9 = { 56 68???????? 8d4db4 668975ac c745c80f000000 c645b400 e8???????? }
condition:
7 of them and filesize < 785408
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8d4dec e8???????? 83ec18 8d4598 8bcc 50 } | |
| $sequence_1 | hex | { d9ec d9c9 d9f1 833d????????00 0f855c74ffff 8d0db00c4500 ba1b000000 } | |
| $sequence_2 | hex | { c7466800000000 c7466c07000000 8b4670 8b4e74 894770 894f74 8b4678 } | |
| $sequence_3 | hex | { c7461000000000 c746140f000000 c60600 8b7d1c 8d4d08 8b5508 8d5d08 } | |
| $sequence_4 | hex | { 3bca 7322 8d4101 894310 8bc3 83fa08 7202 } | |
| $sequence_5 | hex | { 50 8bce e8???????? 50 8d45d0 c645fc02 50 } | |
| $sequence_6 | hex | { e8???????? 8b45ec 83c408 84c0 8d4508 7479 8b551c } | |
| $sequence_7 | hex | { 2bc2 8d8da4fdffff d1f8 50 8d85e0fdffff 50 e8???????? } | |
| $sequence_8 | hex | { 6a00 56 c645fc01 e8???????? 83c410 8bce e8???????? } | |
| $sequence_9 | hex | { 56 68???????? 8d4db4 668975ac c745c80f000000 c645b400 e8???????? } |
Condition
7 of them and filesize < 785408In plain words (Heuristic)
- The file must be smaller than 785408 (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: 2d5f6ac3-96e3-5256-bc78-54c79df807f1
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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