YARA · Malpedia signator rules
MALPEDIA_Win_Rusty_Claw_Auto
autogenerated rule brought to you by yara-signator
MalwareRusty ClawMalpedia 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: Rusty Claw.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-rusty-claw-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Rusty_Claw_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "9bbbdbd2-fe97-535f-ad66-6931dd10ebe1"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.rusty_claw"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.rusty_claw_auto.yar#L1-L133"
= "N/A"
= "e007cc04a88eb89873d51e1a1ceba9e1e68fbd2d8432ebd503905b4d49a2dd9e"
= 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 = { 8b942494000000 8b8c24a0000000 89542418 894c241c 8b542458 8b4c246c 891424 }
$sequence_1 = { 89cf 891424 f7db 31ed 4d 8d042b }
$sequence_2 = { 8a18 0fb6d3 84db 0f899b000000 8d7002 83e21f 897104 }
$sequence_3 = { 31d2 8d4d9c 42 e8???????? 58 8b45a4 8b4ddc }
$sequence_4 = { 83610c00 e8???????? 89c8 89d1 89c2 e8???????? 53 }
$sequence_5 = { eb31 8d5630 89461c 897e10 c786d804000007000000 8d8ec8000000 832200 }
$sequence_6 = { 89442420 894c2424 89542428 894c2444 89442434 8974242c 89e9 }
$sequence_7 = { 0f299424b0020000 0f298c24a0020000 0f284c2450 0f298c24c0020000 50 8d8424c4020000 50 }
$sequence_8 = { 85c0 0f45da 0f45f8 89da 85ed 7445 8b5e04 }
$sequence_9 = { e8???????? a801 7458 89d1 80c1d0 80f90a 721a }
condition:
7 of them and filesize < 518144
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8b942494000000 8b8c24a0000000 89542418 894c241c 8b542458 8b4c246c 891424 } | |
| $sequence_1 | hex | { 89cf 891424 f7db 31ed 4d 8d042b } | |
| $sequence_2 | hex | { 8a18 0fb6d3 84db 0f899b000000 8d7002 83e21f 897104 } | |
| $sequence_3 | hex | { 31d2 8d4d9c 42 e8???????? 58 8b45a4 8b4ddc } | |
| $sequence_4 | hex | { 83610c00 e8???????? 89c8 89d1 89c2 e8???????? 53 } | |
| $sequence_5 | hex | { eb31 8d5630 89461c 897e10 c786d804000007000000 8d8ec8000000 832200 } | |
| $sequence_6 | hex | { 89442420 894c2424 89542428 894c2444 89442434 8974242c 89e9 } | |
| $sequence_7 | hex | { 0f299424b0020000 0f298c24a0020000 0f284c2450 0f298c24c0020000 50 8d8424c4020000 50 } | |
| $sequence_8 | hex | { 85c0 0f45da 0f45f8 89da 85ed 7445 8b5e04 } | |
| $sequence_9 | hex | { e8???????? a801 7458 89d1 80c1d0 80f90a 721a } |
Condition
7 of them and filesize < 518144In plain words (Heuristic)
- The file must be smaller than 518144 (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: 9bbbdbd2-fe97-535f-ad66-6931dd10ebe1
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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