YARA · Malpedia signator rules
MALPEDIA_Win_Milkmaid_Auto
autogenerated rule brought to you by yara-signator
MalwareMilkmaidMalpedia 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: Milkmaid.
It defines 8 patterns (0 text, 8 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-milkmaid-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Milkmaid_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "fb3ce002-8358-50a4-a797-6f9fe573da22"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.milkmaid"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.milkmaid_auto.yar#L1-L101"
= "N/A"
= "7b0b35283fc00cda0dcd2b7be098c70c6caaf6bfe464d9c9743b484b111a2022"
= 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 = { 6a1a 6a00 ff15???????? 6aff }
$sequence_1 = { 53 6801100000 51 8d4c2420 c68424e828010001 e8???????? 85c0 }
$sequence_2 = { 81e1ff0f0000 33db 84c0 8a5c2918 895c2428 }
$sequence_3 = { 64a100000000 6aff 68???????? 50 b8c8280100 }
$sequence_4 = { 53 53 8d4c2434 89542454 }
$sequence_5 = { 7504 33d2 eb05 8b5708 2bd1 8b5c2428 }
$sequence_6 = { 6800010000 8d4c2408 c744241801000000 e8???????? 50 6a00 6a00 }
$sequence_7 = { 8b8c24d4280100 5f 5e 5b 64890d00000000 }
condition:
7 of them and filesize < 65536
}
Strings (8 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 6a1a 6a00 ff15???????? 6aff } | |
| $sequence_1 | hex | { 53 6801100000 51 8d4c2420 c68424e828010001 e8???????? 85c0 } | |
| $sequence_2 | hex | { 81e1ff0f0000 33db 84c0 8a5c2918 895c2428 } | |
| $sequence_3 | hex | { 64a100000000 6aff 68???????? 50 b8c8280100 } | |
| $sequence_4 | hex | { 53 53 8d4c2434 89542454 } | |
| $sequence_5 | hex | { 7504 33d2 eb05 8b5708 2bd1 8b5c2428 } | |
| $sequence_6 | hex | { 6800010000 8d4c2408 c744241801000000 e8???????? 50 6a00 6a00 } | |
| $sequence_7 | hex | { 8b8c24d4280100 5f 5e 5b 64890d00000000 } |
Condition
7 of them and filesize < 65536In plain words (Heuristic)
- The file must be smaller than 65536 (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: fb3ce002-8358-50a4-a797-6f9fe573da22
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