YARA · Malpedia signator rules
MALPEDIA_Win_Makloader_Auto
autogenerated rule brought to you by yara-signator
MalwareMakloaderMalpedia 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: Makloader.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-makloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Makloader_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "44d34284-1d64-5cab-a791-7c5c72650780"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.makloader"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.makloader_auto.yar#L1-L124"
= "N/A"
= "f9f1d012b45aaac9ff386bc946681b8c289d21f1426a975130a7b081c5b7f815"
= 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 = { 7419 8b8d20e6ffff 51 e8???????? 83c404 b801000000 }
$sequence_1 = { 55 8bec 8b4508 53 57 8d1c85e05f4200 8b03 }
$sequence_2 = { 33d2 8b45fc 83c003 8810 8b45fc 8be5 }
$sequence_3 = { 50 e8???????? 83c410 89856ce6ffff 8d956cfeffff 8995c4ebffff 0fb685eee5ffff }
$sequence_4 = { 50 8b95a4e5ffff 52 0fb685f6e5ffff 50 }
$sequence_5 = { 52 68???????? 8d8d2ce9ffff e8???????? 8bc8 e8???????? }
$sequence_6 = { 6804010000 6a00 8d8de0fbffff 51 e8???????? 83c40c }
$sequence_7 = { 8d8ddce9ffff e8???????? 8bc8 e8???????? }
$sequence_8 = { 50 e8???????? 83c410 89856ce6ffff 83bd6ce6ffff00 0f848f010000 8b8528e6ffff }
$sequence_9 = { 6b45e430 8945e0 8d8000564200 8945e4 803800 8bc8 }
condition:
7 of them and filesize < 335872
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 7419 8b8d20e6ffff 51 e8???????? 83c404 b801000000 } | |
| $sequence_1 | hex | { 55 8bec 8b4508 53 57 8d1c85e05f4200 8b03 } | |
| $sequence_2 | hex | { 33d2 8b45fc 83c003 8810 8b45fc 8be5 } | |
| $sequence_3 | hex | { 50 e8???????? 83c410 89856ce6ffff 8d956cfeffff 8995c4ebffff 0fb685eee5ffff } | |
| $sequence_4 | hex | { 50 8b95a4e5ffff 52 0fb685f6e5ffff 50 } | |
| $sequence_5 | hex | { 52 68???????? 8d8d2ce9ffff e8???????? 8bc8 e8???????? } | |
| $sequence_6 | hex | { 6804010000 6a00 8d8de0fbffff 51 e8???????? 83c40c } | |
| $sequence_7 | hex | { 8d8ddce9ffff e8???????? 8bc8 e8???????? } | |
| $sequence_8 | hex | { 50 e8???????? 83c410 89856ce6ffff 83bd6ce6ffff00 0f848f010000 8b8528e6ffff } | |
| $sequence_9 | hex | { 6b45e430 8945e0 8d8000564200 8945e4 803800 8bc8 } |
Condition
7 of them and filesize < 335872In plain words (Heuristic)
- The file must be smaller than 335872 (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: 44d34284-1d64-5cab-a791-7c5c72650780
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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