YARA · Malpedia signator rules
MALPEDIA_Win_Mirrorkey_Auto
autogenerated rule brought to you by yara-signator
MalwareMirrorkeyMalpedia 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: Mirrorkey.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-mirrorkey-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Mirrorkey_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "0eb308b5-3815-5b9c-81c4-a78cbb0d1b3d"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.mirrorkey"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.mirrorkey_auto.yar#L1-L121"
= "N/A"
= "8d65dba7f9bead9137a917a1b3b1727a25c3d194aa105ebabd30da323bba34f8"
= 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 = { 5d c20800 e9???????? 3b0d???????? f27502 f2c3 f2e9ca030000 }
$sequence_1 = { 57 8b13 0f57c0 8b7d0c 83c2e0 50 }
$sequence_2 = { 8b06 eb02 8bc6 c60000 c745fc00000000 8bce a1???????? }
$sequence_3 = { 68???????? ff15???????? 57 8b7d18 }
$sequence_4 = { 6aff 6a00 56 8d4db8 c745cc0f000000 c745c800000000 c645b800 }
$sequence_5 = { 50 e8???????? ff75fc 8d45fc ff75f8 50 }
$sequence_6 = { 51 e8???????? ff7004 ff30 ff15???????? 83c41c }
$sequence_7 = { 56 ff15???????? 5f 5e c7430400000000 }
$sequence_8 = { 46 3bf3 7ccf 8b4dfc }
$sequence_9 = { 85c0 7405 8a0c06 eb03 8a4ef4 }
condition:
7 of them and filesize < 117760
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 5d c20800 e9???????? 3b0d???????? f27502 f2c3 f2e9ca030000 } | |
| $sequence_1 | hex | { 57 8b13 0f57c0 8b7d0c 83c2e0 50 } | |
| $sequence_2 | hex | { 8b06 eb02 8bc6 c60000 c745fc00000000 8bce a1???????? } | |
| $sequence_3 | hex | { 68???????? ff15???????? 57 8b7d18 } | |
| $sequence_4 | hex | { 6aff 6a00 56 8d4db8 c745cc0f000000 c745c800000000 c645b800 } | |
| $sequence_5 | hex | { 50 e8???????? ff75fc 8d45fc ff75f8 50 } | |
| $sequence_6 | hex | { 51 e8???????? ff7004 ff30 ff15???????? 83c41c } | |
| $sequence_7 | hex | { 56 ff15???????? 5f 5e c7430400000000 } | |
| $sequence_8 | hex | { 46 3bf3 7ccf 8b4dfc } | |
| $sequence_9 | hex | { 85c0 7405 8a0c06 eb03 8a4ef4 } |
Condition
7 of them and filesize < 117760In plain words (Heuristic)
- The file must be smaller than 117760 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
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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: 0eb308b5-3815-5b9c-81c4-a78cbb0d1b3d
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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