YARA · Malpedia signator rules
MALPEDIA_Win_Mortis_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: Mortis.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-mortis-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Mortis_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "dbe687bf-0b72-53ae-b169-e120ce0111c3"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.mortis"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.mortis_auto.yar#L1-L127"
= "N/A"
= "34f4bf3937ac9feb2a5a10e1f9edc6ce460181f96ee77ab2ff794db89a8aa306"
= 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 = { c78560ffffff90044300 e8???????? 83c404 8b4df4 64890d00000000 59 5f }
$sequence_1 = { b8aaaaaa0a c1fa02 8bca c1e91f 03ca 2bc1 894dc8 }
$sequence_2 = { ffb54cfdffff 8d4d98 e8???????? be11000000 }
$sequence_3 = { 8b4004 c7443890fcc24300 8b06 8b5004 8d4290 89443a8c e8???????? }
$sequence_4 = { 5d c3 ba???????? eb05 ba???????? b9???????? e8???????? }
$sequence_5 = { 8bce e8???????? 8b460c 83b8a800000000 750e 8b04bd201f4400 }
$sequence_6 = { 8955d8 8bd9 8b03 33ff 895de4 }
$sequence_7 = { 83c404 8b7de4 3bf7 743c 90 837e0400 }
$sequence_8 = { 8bce e8???????? c645fc04 8b4dd0 83f910 722c 8b55bc }
$sequence_9 = { 8b4df0 8b0485201f4400 8a44012b 8b4d08 3c0a 7461 85db }
condition:
7 of them and filesize < 577536
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { c78560ffffff90044300 e8???????? 83c404 8b4df4 64890d00000000 59 5f } | |
| $sequence_1 | hex | { b8aaaaaa0a c1fa02 8bca c1e91f 03ca 2bc1 894dc8 } | |
| $sequence_2 | hex | { ffb54cfdffff 8d4d98 e8???????? be11000000 } | |
| $sequence_3 | hex | { 8b4004 c7443890fcc24300 8b06 8b5004 8d4290 89443a8c e8???????? } | |
| $sequence_4 | hex | { 5d c3 ba???????? eb05 ba???????? b9???????? e8???????? } | |
| $sequence_5 | hex | { 8bce e8???????? 8b460c 83b8a800000000 750e 8b04bd201f4400 } | |
| $sequence_6 | hex | { 8955d8 8bd9 8b03 33ff 895de4 } | |
| $sequence_7 | hex | { 83c404 8b7de4 3bf7 743c 90 837e0400 } | |
| $sequence_8 | hex | { 8bce e8???????? c645fc04 8b4dd0 83f910 722c 8b55bc } | |
| $sequence_9 | hex | { 8b4df0 8b0485201f4400 8a44012b 8b4d08 3c0a 7461 85db } |
Condition
7 of them and filesize < 577536In plain words (Heuristic)
- The file must be smaller than 577536 (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: dbe687bf-0b72-53ae-b169-e120ce0111c3
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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