YARA · Malpedia signator rules
MALPEDIA_Win_Molerat_Loader_Auto
autogenerated rule brought to you by yara-signator
MalwareMolerat LoaderMalpedia 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: Molerat Loader.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-molerat-loader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Molerat_Loader_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "dd34e6fe-166f-5992-ad77-da2eef3e6cc0"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.molerat_loader"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.molerat_loader_auto.yar#L1-L122"
= "N/A"
= "5fb2e2aad10aacaac4a058eda16abe79ff96d35c84f0d7b23df476065493d644"
= 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 = { 50 c645fc83 e8???????? 83c40c c645fc84 }
$sequence_1 = { e9???????? 81bd5cfeffff68494400 742d 8b4508 83c005 }
$sequence_2 = { 8b08 8b11 50 8b4204 ffd0 c644243409 8b44240c }
$sequence_3 = { 8d9b00000000 8b13 8b5234 68cf070000 8d4500 50 }
$sequence_4 = { ebb4 8ad3 80c240 80fa1f 77f0 83c701 }
$sequence_5 = { 7d10 668b4c4310 66890c456c7e4400 40 ebe8 33c0 8945e4 }
$sequence_6 = { c645fc21 8b8568feffff 83c0f0 8d480c 83caff f00fc111 4a }
$sequence_7 = { 83c408 84c0 0f8430060000 51 }
$sequence_8 = { 8bcb e8???????? c645fc3e 8b45e8 }
$sequence_9 = { 83c110 890b eb0c 8b48f4 51 50 8bcb }
condition:
7 of them and filesize < 688128
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 50 c645fc83 e8???????? 83c40c c645fc84 } | |
| $sequence_1 | hex | { e9???????? 81bd5cfeffff68494400 742d 8b4508 83c005 } | |
| $sequence_2 | hex | { 8b08 8b11 50 8b4204 ffd0 c644243409 8b44240c } | |
| $sequence_3 | hex | { 8d9b00000000 8b13 8b5234 68cf070000 8d4500 50 } | |
| $sequence_4 | hex | { ebb4 8ad3 80c240 80fa1f 77f0 83c701 } | |
| $sequence_5 | hex | { 7d10 668b4c4310 66890c456c7e4400 40 ebe8 33c0 8945e4 } | |
| $sequence_6 | hex | { c645fc21 8b8568feffff 83c0f0 8d480c 83caff f00fc111 4a } | |
| $sequence_7 | hex | { 83c408 84c0 0f8430060000 51 } | |
| $sequence_8 | hex | { 8bcb e8???????? c645fc3e 8b45e8 } | |
| $sequence_9 | hex | { 83c110 890b eb0c 8b48f4 51 50 8bcb } |
Condition
7 of them and filesize < 688128In plain words (Heuristic)
- The file must be smaller than 688128 (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: dd34e6fe-166f-5992-ad77-da2eef3e6cc0
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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