YARA · Malpedia signator rules
MALPEDIA_Win_Guidloader_Auto
autogenerated rule brought to you by yara-signator
MalwareGuidloaderMalpedia 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: Guidloader.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-guidloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Guidloader_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "534e1a6f-2457-591b-9bbb-15f45fb7dfe8"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.guidloader"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.guidloader_auto.yar#L1-L124"
= "N/A"
= "ed9095d4782fba48258f819f1d0768a67dce54607139e431173a7b68938ea163"
= 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 = { 488b5160 448b8218010000 41c1e010 440b821c010000 4181f801000500 730b 4805d8000000 }
$sequence_1 = { 0f28b42490000000 4c8bb424a0000000 488bac24d0000000 488b9c24c8000000 488b4c2468 4833cc e8???????? }
$sequence_2 = { f30f7f4c2458 498bd6 488d4c2448 e8???????? 488d542448 488bce }
$sequence_3 = { 443bc8 7405 8b5590 ebad 418bdf 85ff 7418 }
$sequence_4 = { 757e 488d3da69d7601 8b4318 a90c010000 756d 0d02110000 }
$sequence_5 = { eb26 0fb739 eb21 8b5330 8bc2 488b4b20 c1e804 }
$sequence_6 = { 4c8ba0f8000000 65488b042530000000 488b4860 8b8118010000 c1e010 0b811c010000 }
$sequence_7 = { 8b50fc d3ea 448bda 4183e303 }
$sequence_8 = { 0f8c84000000 488bcf bf00800000 66853c4a 7476 488b4808 }
$sequence_9 = { 4d85c0 7437 413830 7509 }
condition:
7 of them and filesize < 49251328
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 488b5160 448b8218010000 41c1e010 440b821c010000 4181f801000500 730b 4805d8000000 } | |
| $sequence_1 | hex | { 0f28b42490000000 4c8bb424a0000000 488bac24d0000000 488b9c24c8000000 488b4c2468 4833cc e8???????? } | |
| $sequence_2 | hex | { f30f7f4c2458 498bd6 488d4c2448 e8???????? 488d542448 488bce } | |
| $sequence_3 | hex | { 443bc8 7405 8b5590 ebad 418bdf 85ff 7418 } | |
| $sequence_4 | hex | { 757e 488d3da69d7601 8b4318 a90c010000 756d 0d02110000 } | |
| $sequence_5 | hex | { eb26 0fb739 eb21 8b5330 8bc2 488b4b20 c1e804 } | |
| $sequence_6 | hex | { 4c8ba0f8000000 65488b042530000000 488b4860 8b8118010000 c1e010 0b811c010000 } | |
| $sequence_7 | hex | { 8b50fc d3ea 448bda 4183e303 } | |
| $sequence_8 | hex | { 0f8c84000000 488bcf bf00800000 66853c4a 7476 488b4808 } | |
| $sequence_9 | hex | { 4d85c0 7437 413830 7509 } |
Condition
7 of them and filesize < 49251328In plain words (Heuristic)
- The file must be smaller than 49251328 (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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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: 534e1a6f-2457-591b-9bbb-15f45fb7dfe8
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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