YARA · Malpedia signator rules
MALPEDIA_Win_Stealhook_Auto
autogenerated rule brought to you by yara-signator
MalwareStealhookMalpedia 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: Stealhook.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-stealhook-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Stealhook_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "296f5aee-ffa1-5f36-a21a-4cf73eb93c5f"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.stealhook"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.stealhook_auto.yar#L1-L133"
= "N/A"
= "43462dcbe834192ff5f679907343d7b590d011b91e19ec61f90c0466a187568e"
= 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 = { f20f59ee f20f5ce9 f2410f1004c1 488d1536f50000 f20f1014c2 f20f1025???????? f20f59e6 }
$sequence_1 = { 33d2 e8???????? 48894720 488d0d34550400 807b5604 7704 488b4b40 }
$sequence_2 = { 48894c2428 4533ff 488d15ff220700 33c9 e8???????? 488b4310 48837b1807 }
$sequence_3 = { 4883ec20 488d0537f50200 488bda 4a8b04c0 483902 7416 8b81a8030000 }
$sequence_4 = { 4533c0 45894320 488d056ac60600 488901 4c8981b8000000 4c8981c0000000 448981c8000000 }
$sequence_5 = { 488b8c2428010000 e8???????? 4c8d842470180000 bae8030000 488d8c2480040000 e8???????? 33db }
$sequence_6 = { 488d05fa930600 49894408f0 488b07 4c634004 458d48f0 45894c08ec 488d05de920600 }
$sequence_7 = { 488b07 4c634004 488d05fa930600 49894408f0 488b07 4c634004 }
$sequence_8 = { 722b 410fb609 41ffc0 83e10f 4a0fbe8431389a0600 428a8c31489a0600 4c2bc8 }
$sequence_9 = { 4c896c2428 4c897c2420 e8???????? 84c0 0f8493feffff 4c8d25ed540200 49391f }
condition:
7 of them and filesize < 1129472
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { f20f59ee f20f5ce9 f2410f1004c1 488d1536f50000 f20f1014c2 f20f1025???????? f20f59e6 } | |
| $sequence_1 | hex | { 33d2 e8???????? 48894720 488d0d34550400 807b5604 7704 488b4b40 } | |
| $sequence_2 | hex | { 48894c2428 4533ff 488d15ff220700 33c9 e8???????? 488b4310 48837b1807 } | |
| $sequence_3 | hex | { 4883ec20 488d0537f50200 488bda 4a8b04c0 483902 7416 8b81a8030000 } | |
| $sequence_4 | hex | { 4533c0 45894320 488d056ac60600 488901 4c8981b8000000 4c8981c0000000 448981c8000000 } | |
| $sequence_5 | hex | { 488b8c2428010000 e8???????? 4c8d842470180000 bae8030000 488d8c2480040000 e8???????? 33db } | |
| $sequence_6 | hex | { 488d05fa930600 49894408f0 488b07 4c634004 458d48f0 45894c08ec 488d05de920600 } | |
| $sequence_7 | hex | { 488b07 4c634004 488d05fa930600 49894408f0 488b07 4c634004 } | |
| $sequence_8 | hex | { 722b 410fb609 41ffc0 83e10f 4a0fbe8431389a0600 428a8c31489a0600 4c2bc8 } | |
| $sequence_9 | hex | { 4c896c2428 4c897c2420 e8???????? 84c0 0f8493feffff 4c8d25ed540200 49391f } |
Condition
7 of them and filesize < 1129472In plain words (Heuristic)
- The file must be smaller than 1129472 (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: 296f5aee-ffa1-5f36-a21a-4cf73eb93c5f
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