YARA · Malpedia signator rules
MALPEDIA_Win_Mount_Locker_Auto
autogenerated rule brought to you by yara-signator
MalwareMount LockerMalpedia 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: Mount Locker.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-mount-locker-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Mount_Locker_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "63bbcac5-b955-5b5d-aa2d-70707a28fbd4"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.mount_locker"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.mount_locker_auto.yar#L1-L158"
= "N/A"
= "fb8e6328f63d69a9ce7f54925d54c5554693b50d0c29d597a972ebecbfcd31cd"
= 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 = { f30f5905???????? 0f5ad0 66490f7ed0 e8???????? }
$sequence_1 = { 488bcb 488b15???????? e8???????? 85c0 }
$sequence_2 = { 4c8bf2 8bf1 33d2 33c9 }
$sequence_3 = { 498be8 4d8bc8 4c8bc2 4c8bf2 8bf1 }
$sequence_4 = { 488d4df0 4889442428 4533c9 4533c0 }
$sequence_5 = { 8bc8 81e10000ffff 81f900000780 7503 0fb7c0 }
$sequence_6 = { 488364242800 4c8d442430 488364242000 4533c9 488b4c2458 33d2 c744243001000000 }
$sequence_7 = { 488b0b 41b902000000 4533c0 33d2 }
$sequence_8 = { ff15???????? 85c0 7509 f0ff05???????? }
$sequence_9 = { 488b4d6f 8bd8 ff15???????? 488b4d77 }
$sequence_10 = { 7505 e8???????? 833d????????00 7409 833d????????00 }
$sequence_11 = { 57 ff7608 8d85b0fdffff ff7604 50 e8???????? 85c0 }
$sequence_12 = { d1c0 2da55a0000 d1c8 f7d0 }
$sequence_13 = { 8bc6 83d100 f00fc74d00 3bc6 75d7 }
$sequence_14 = { 89442428 8d442410 50 896c2414 896c2418 }
$sequence_15 = { 89860c020000 ebd5 83be0c02000000 74cd 837f0401 }
condition:
7 of them and filesize < 368640
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { f30f5905???????? 0f5ad0 66490f7ed0 e8???????? } | |
| $sequence_1 | hex | { 488bcb 488b15???????? e8???????? 85c0 } | |
| $sequence_2 | hex | { 4c8bf2 8bf1 33d2 33c9 } | |
| $sequence_3 | hex | { 498be8 4d8bc8 4c8bc2 4c8bf2 8bf1 } | |
| $sequence_4 | hex | { 488d4df0 4889442428 4533c9 4533c0 } | |
| $sequence_5 | hex | { 8bc8 81e10000ffff 81f900000780 7503 0fb7c0 } | |
| $sequence_6 | hex | { 488364242800 4c8d442430 488364242000 4533c9 488b4c2458 33d2 c744243001000000 } | |
| $sequence_7 | hex | { 488b0b 41b902000000 4533c0 33d2 } | |
| $sequence_8 | hex | { ff15???????? 85c0 7509 f0ff05???????? } | |
| $sequence_9 | hex | { 488b4d6f 8bd8 ff15???????? 488b4d77 } | |
| $sequence_10 | hex | { 7505 e8???????? 833d????????00 7409 833d????????00 } | |
| $sequence_11 | hex | { 57 ff7608 8d85b0fdffff ff7604 50 e8???????? 85c0 } | |
| $sequence_12 | hex | { d1c0 2da55a0000 d1c8 f7d0 } | |
| $sequence_13 | hex | { 8bc6 83d100 f00fc74d00 3bc6 75d7 } | |
| $sequence_14 | hex | { 89442428 8d442410 50 896c2414 896c2418 } | |
| $sequence_15 | hex | { 89860c020000 ebd5 83be0c02000000 74cd 837f0401 } |
Condition
7 of them and filesize < 368640In plain words (Heuristic)
- The file must be smaller than 368640 (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: 63bbcac5-b955-5b5d-aa2d-70707a28fbd4
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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