YARA · Malpedia signator rules
MALPEDIA_Win_Miya_Rat_Auto
autogenerated rule brought to you by yara-signator
MalwareMiya RatMalpedia 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: Miya Rat.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-miya-rat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Miya_Rat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "2fa09cd0-d97e-5ef1-8afd-e504ebc4635f"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.miya_rat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.miya_rat_auto.yar#L1-L168"
= "N/A"
= "82308fdb4facad37689505ec7cf7b431c129eb6fc4d51d1c40907638216c7b5c"
= 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 = { 0fbf45fc c9 c3 8bff 55 8bec 83ec18 }
$sequence_1 = { 68a00f0000 ff15???????? 6a00 6a00 }
$sequence_2 = { 837c240800 75be ddd8 db2d???????? b802000000 833d????????00 0f85e00c0000 }
$sequence_3 = { 7541 d9ec d9c9 d9f1 833d????????00 0f854c0d0000 }
$sequence_4 = { 6a00 6a06 6a01 6a02 ff15???????? a3???????? }
$sequence_5 = { 833d????????00 0f84fa0f0000 83ec08 0fae5c2404 8b442404 25807f0000 3d801f0000 }
$sequence_6 = { 0f85c90f0000 eb00 f30f7e442404 660f2815???????? 660f28c8 660f28f8 660f73d034 }
$sequence_7 = { 6683e07f 6683f87f 8d642408 0f85c90f0000 }
$sequence_8 = { 03bc24b8000000 488b542440 488d2d5c080300 488b44d500 }
$sequence_9 = { 03c0 2bc8 0f84adfdffff 8d41ff 8b8482f83d0700 }
$sequence_10 = { 0308 3bcf 0f84ff000000 488d8c2470010000 }
$sequence_11 = { 03c0 2bc8 0f8456f9ffff 8d41ff 418b8480f83d0700 }
$sequence_12 = { 03c0 442bc0 0f8423010000 418d40ff 418b8484f83d0700 }
$sequence_13 = { 03c0 442be8 0f84a1000000 418d45ff 418b8484f83d0700 }
$sequence_14 = { 03c0 442be8 0f84bd000000 418d45ff 488d1d6debfaff }
$sequence_15 = { 03c0 442be0 7443 418d4424ff 8b8483f83d0700 }
condition:
7 of them and filesize < 1238016
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 0fbf45fc c9 c3 8bff 55 8bec 83ec18 } | |
| $sequence_1 | hex | { 68a00f0000 ff15???????? 6a00 6a00 } | |
| $sequence_2 | hex | { 837c240800 75be ddd8 db2d???????? b802000000 833d????????00 0f85e00c0000 } | |
| $sequence_3 | hex | { 7541 d9ec d9c9 d9f1 833d????????00 0f854c0d0000 } | |
| $sequence_4 | hex | { 6a00 6a06 6a01 6a02 ff15???????? a3???????? } | |
| $sequence_5 | hex | { 833d????????00 0f84fa0f0000 83ec08 0fae5c2404 8b442404 25807f0000 3d801f0000 } | |
| $sequence_6 | hex | { 0f85c90f0000 eb00 f30f7e442404 660f2815???????? 660f28c8 660f28f8 660f73d034 } | |
| $sequence_7 | hex | { 6683e07f 6683f87f 8d642408 0f85c90f0000 } | |
| $sequence_8 | hex | { 03bc24b8000000 488b542440 488d2d5c080300 488b44d500 } | |
| $sequence_9 | hex | { 03c0 2bc8 0f84adfdffff 8d41ff 8b8482f83d0700 } | |
| $sequence_10 | hex | { 0308 3bcf 0f84ff000000 488d8c2470010000 } | |
| $sequence_11 | hex | { 03c0 2bc8 0f8456f9ffff 8d41ff 418b8480f83d0700 } | |
| $sequence_12 | hex | { 03c0 442bc0 0f8423010000 418d40ff 418b8484f83d0700 } | |
| $sequence_13 | hex | { 03c0 442be8 0f84a1000000 418d45ff 418b8484f83d0700 } | |
| $sequence_14 | hex | { 03c0 442be8 0f84bd000000 418d45ff 488d1d6debfaff } | |
| $sequence_15 | hex | { 03c0 442be0 7443 418d4424ff 8b8483f83d0700 } |
Condition
7 of them and filesize < 1238016In plain words (Heuristic)
- The file must be smaller than 1238016 (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: 2fa09cd0-d97e-5ef1-8afd-e504ebc4635f
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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