YARA · Malpedia signator rules
MALPEDIA_Win_Arkei_Stealer_Auto
autogenerated rule brought to you by yara-signator
MalwareArkei StealerMalpedia 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: Arkei Stealer.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-arkei-stealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Arkei_Stealer_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "3de0bd09-57e2-59a9-b60f-83adb1dab455"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.arkei_stealer"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.arkei_stealer_auto.yar#L1-L122"
= "N/A"
= "26da82ca5a11cef123ad331344126b45d9f81d18a9c5914ab02d3198808fcb02"
= 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 = { 8b4e20 8b16 8d448a0e 6a00 8d4de4 51 6a0e }
$sequence_1 = { 894e04 8b55cc 895608 668b45d4 6689460c 668b4dd6 }
$sequence_2 = { 6a40 ff15???????? 8bf0 c70628000000 8b4dc8 894e04 8b55cc }
$sequence_3 = { 8b4dc8 894e04 8b55cc 895608 668b45d4 }
$sequence_4 = { 668b45d4 6689460c 668b4dd6 66894e0e }
$sequence_5 = { ff15???????? 85c0 74de 8b4de8 682000cc00 53 56 }
$sequence_6 = { 56 6a00 6a00 57 53 56 6a00 }
$sequence_7 = { 57 8945e8 ffd3 6a0a 57 8bf0 }
$sequence_8 = { 83ffff 0f849ffeffff ba424d0000 668955ec }
$sequence_9 = { 6a00 51 ff15???????? 85c0 74be }
condition:
7 of them and filesize < 1744896
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8b4e20 8b16 8d448a0e 6a00 8d4de4 51 6a0e } | |
| $sequence_1 | hex | { 894e04 8b55cc 895608 668b45d4 6689460c 668b4dd6 } | |
| $sequence_2 | hex | { 6a40 ff15???????? 8bf0 c70628000000 8b4dc8 894e04 8b55cc } | |
| $sequence_3 | hex | { 8b4dc8 894e04 8b55cc 895608 668b45d4 } | |
| $sequence_4 | hex | { 668b45d4 6689460c 668b4dd6 66894e0e } | |
| $sequence_5 | hex | { ff15???????? 85c0 74de 8b4de8 682000cc00 53 56 } | |
| $sequence_6 | hex | { 56 6a00 6a00 57 53 56 6a00 } | |
| $sequence_7 | hex | { 57 8945e8 ffd3 6a0a 57 8bf0 } | |
| $sequence_8 | hex | { 83ffff 0f849ffeffff ba424d0000 668955ec } | |
| $sequence_9 | hex | { 6a00 51 ff15???????? 85c0 74be } |
Condition
7 of them and filesize < 1744896In plain words (Heuristic)
- The file must be smaller than 1744896 (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: 3de0bd09-57e2-59a9-b60f-83adb1dab455
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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