YARA · Malpedia signator rules
MALPEDIA_Win_Misha_Auto
autogenerated rule brought to you by yara-signator
- 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: Misha.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-misha-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Misha_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "57a86f97-0226-57cc-b18e-fd683342e34c"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.misha"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.misha_auto.yar#L1-L131"
= "N/A"
= "b455493573aed00c54386916fa074b0978e9f408f42bd4d3861eacb866a330b6"
= 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 = { 894df0 8b4d90 83c104 ff75f0 8b45b4 e8???????? 59 }
$sequence_1 = { 59 39551c 7409 ff751c e8???????? 59 5d }
$sequence_2 = { ff7508 ff75cc e8???????? 83c410 8945b0 837d2402 7520 }
$sequence_3 = { 8d45f4 50 6a28 e8???????? 59 59 85c0 }
$sequence_4 = { 8b45d8 6bc038 8b4b18 8d440120 50 ff7324 8b45e8 }
$sequence_5 = { 8b4df8 8908 8b4510 8b4d0c 894808 8b45f8 8b4008 }
$sequence_6 = { ff5168 85c0 8b45f8 8b08 50 0f99c3 }
$sequence_7 = { c785acfeffff1b1b1b1b c785b0feffff1b1b1b1b c785b4feffff1b1b1b1b 66c785b8feffff1b1b c685bafeffff1c }
$sequence_8 = { b84d5a0000 663901 755a 8b413c 8d90f8000000 39542404 7c4b }
$sequence_9 = { ff75dc 6a08 59 e8???????? 83c420 0fb6c0 85c0 }
condition:
7 of them and filesize < 710656
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 894df0 8b4d90 83c104 ff75f0 8b45b4 e8???????? 59 } | |
| $sequence_1 | hex | { 59 39551c 7409 ff751c e8???????? 59 5d } | |
| $sequence_2 | hex | { ff7508 ff75cc e8???????? 83c410 8945b0 837d2402 7520 } | |
| $sequence_3 | hex | { 8d45f4 50 6a28 e8???????? 59 59 85c0 } | |
| $sequence_4 | hex | { 8b45d8 6bc038 8b4b18 8d440120 50 ff7324 8b45e8 } | |
| $sequence_5 | hex | { 8b4df8 8908 8b4510 8b4d0c 894808 8b45f8 8b4008 } | |
| $sequence_6 | hex | { ff5168 85c0 8b45f8 8b08 50 0f99c3 } | |
| $sequence_7 | hex | { c785acfeffff1b1b1b1b c785b0feffff1b1b1b1b c785b4feffff1b1b1b1b 66c785b8feffff1b1b c685bafeffff1c } | |
| $sequence_8 | hex | { b84d5a0000 663901 755a 8b413c 8d90f8000000 39542404 7c4b } | |
| $sequence_9 | hex | { ff75dc 6a08 59 e8???????? 83c420 0fb6c0 85c0 } |
Condition
7 of them and filesize < 710656In plain words (Heuristic)
- The file must be smaller than 710656 (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: 57a86f97-0226-57cc-b18e-fd683342e34c
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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