YARA · Malpedia signator rules
MALPEDIA_Win_Unidentified_042_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
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-unidentified-042-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_042_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "c75e52e9-dfdd-54d9-9fef-bcc12eba6502"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_042"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_042_auto.yar#L1-L132"
= "N/A"
= "04747e04bc8d0c9a49c029c2ad4b9af0895855ed01472136f24c3c48dd40b81e"
= 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 = { 81e200ff0000 81e3000000ff 33cb 33ca 338ff0054300 83c704 3348d8 }
$sequence_1 = { b8b9feffff 5e c3 66838e5202000001 b8ccfeffff 5e }
$sequence_2 = { 8b4304 0fb708 03f1 83c40c c6043701 f6835202000010 7407 }
$sequence_3 = { 6a01 6a16 51 52 53 8bd7 8bce }
$sequence_4 = { c78570ffffff3af54fa5 c78574ffffff7f520e51 c78578ffffff8c68059b c7857cffffffabd9831f c7458019cde05b e8???????? 83c404 }
$sequence_5 = { e8???????? 8be5 5d c3 3d14001500 75e4 8db5e2efffff }
$sequence_6 = { 33d6 8955f8 33d1 035044 8d943a0c38e5fd 8b7df8 c1c217 }
$sequence_7 = { 8bfe e8???????? 83c408 85c0 7881 8b03 8b7508 }
$sequence_8 = { 33df 8bfe c1cf12 c1ce07 33fe 8bb5ccfeffff }
$sequence_9 = { c78424f80100001f964e7f c78424fc010000d15d9ed8 c78424000200002872522d bb02000000 c78424040200001b02a94a c78424080200009753aab1 c784240c020000680f208c }
condition:
7 of them and filesize < 516096
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 81e200ff0000 81e3000000ff 33cb 33ca 338ff0054300 83c704 3348d8 } | |
| $sequence_1 | hex | { b8b9feffff 5e c3 66838e5202000001 b8ccfeffff 5e } | |
| $sequence_2 | hex | { 8b4304 0fb708 03f1 83c40c c6043701 f6835202000010 7407 } | |
| $sequence_3 | hex | { 6a01 6a16 51 52 53 8bd7 8bce } | |
| $sequence_4 | hex | { c78570ffffff3af54fa5 c78574ffffff7f520e51 c78578ffffff8c68059b c7857cffffffabd9831f c7458019cde05b e8???????? 83c404 } | |
| $sequence_5 | hex | { e8???????? 8be5 5d c3 3d14001500 75e4 8db5e2efffff } | |
| $sequence_6 | hex | { 33d6 8955f8 33d1 035044 8d943a0c38e5fd 8b7df8 c1c217 } | |
| $sequence_7 | hex | { 8bfe e8???????? 83c408 85c0 7881 8b03 8b7508 } | |
| $sequence_8 | hex | { 33df 8bfe c1cf12 c1ce07 33fe 8bb5ccfeffff } | |
| $sequence_9 | hex | { c78424f80100001f964e7f c78424fc010000d15d9ed8 c78424000200002872522d bb02000000 c78424040200001b02a94a c78424080200009753aab1 c784240c020000680f208c } |
Condition
7 of them and filesize < 516096In plain words (Heuristic)
- The file must be smaller than 516096 (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: c75e52e9-dfdd-54d9-9fef-bcc12eba6502
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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