YARA · Malpedia signator rules
MALPEDIA_Win_Stealer_0X3401_Auto
autogenerated rule brought to you by yara-signator
MalwareStealer 0X3401Malpedia 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: Stealer 0X3401.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-stealer-0x3401-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Stealer_0X3401_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "c3a754bd-df85-5443-a989-e577888f5f8f"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.stealer_0x3401"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.stealer_0x3401_auto.yar#L1-L131"
= "N/A"
= "a0c2640511ace27c59577cc0f7a5154040435b7300f76db857b3e86a8af1af06"
= 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 = { e8???????? c745fcffffffff 8b45bc 83f810 7242 8b4da8 40 }
$sequence_1 = { 8b8510ffffff 85c0 7473 50 8d4dbc e8???????? 8bd0 }
$sequence_2 = { 8bc8 51 e8???????? 83c404 6a54 68???????? }
$sequence_3 = { 68???????? b9???????? e8???????? e9???????? 83fe03 0f87e3000000 ff24b55c3e0010 }
$sequence_4 = { 8b06 894714 c70607000000 833e08 c746fc00000000 7205 8b46ec }
$sequence_5 = { 731f 8bc1 83e13f c1f806 6bc930 8b0485c8710210 f644082801 }
$sequence_6 = { c745e800000000 668945d8 663902 741d 8bc2 8d7802 }
$sequence_7 = { c745fc04000000 e8???????? 8b45a4 83f810 7242 8b4d90 }
$sequence_8 = { 50 8d45f4 64a300000000 8d8580fdffff c7857cfdffff00000000 50 ff15???????? }
$sequence_9 = { c70300000000 8b4310 894610 8b4314 894614 c7431407000000 837b1408 }
condition:
7 of them and filesize < 357376
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e8???????? c745fcffffffff 8b45bc 83f810 7242 8b4da8 40 } | |
| $sequence_1 | hex | { 8b8510ffffff 85c0 7473 50 8d4dbc e8???????? 8bd0 } | |
| $sequence_2 | hex | { 8bc8 51 e8???????? 83c404 6a54 68???????? } | |
| $sequence_3 | hex | { 68???????? b9???????? e8???????? e9???????? 83fe03 0f87e3000000 ff24b55c3e0010 } | |
| $sequence_4 | hex | { 8b06 894714 c70607000000 833e08 c746fc00000000 7205 8b46ec } | |
| $sequence_5 | hex | { 731f 8bc1 83e13f c1f806 6bc930 8b0485c8710210 f644082801 } | |
| $sequence_6 | hex | { c745e800000000 668945d8 663902 741d 8bc2 8d7802 } | |
| $sequence_7 | hex | { c745fc04000000 e8???????? 8b45a4 83f810 7242 8b4d90 } | |
| $sequence_8 | hex | { 50 8d45f4 64a300000000 8d8580fdffff c7857cfdffff00000000 50 ff15???????? } | |
| $sequence_9 | hex | { c70300000000 8b4310 894610 8b4314 894614 c7431407000000 837b1408 } |
Condition
7 of them and filesize < 357376In plain words (Heuristic)
- The file must be smaller than 357376 (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: c3a754bd-df85-5443-a989-e577888f5f8f
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