YARA · Malpedia signator rules
MALPEDIA_Win_Unidentified_031_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-031-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_031_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "77de712f-509a-5bd9-ac06-6a495b0af267"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_031"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_031_auto.yar#L1-L133"
= "N/A"
= "9cca10a3297d9a7590bafcb743e4efb81d784e6f90c0ccf678132212f3cb6c5a"
= 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 = { 8b0e 8d55e0 52 57 57 50 56 }
$sequence_1 = { 8d5dc4 53 83ec10 8bdc 8913 8b9568ffffff 895304 }
$sequence_2 = { 8d45c8 8d8d6cfeffff 50 51 ffd3 50 8d55b0 }
$sequence_3 = { 7510 68???????? 68???????? ff15???????? 8b35???????? 8d8dc4feffff 51 }
$sequence_4 = { 898500020000 53 8d8508020000 50 c7850402000010d01800 ffd6 6a70 }
$sequence_5 = { 8b4604 b900000700 3bc1 7727 7441 3d00000200 743a }
$sequence_6 = { 8bcf e8???????? 8945dc 50 8bce e8???????? 8bf8 }
$sequence_7 = { 5a 899530ffffff be601b0001 8dbd34ffffff a5 a5 }
$sequence_8 = { ab ab ab 8365f400 83c630 8bce c745f009000000 }
$sequence_9 = { 53 ff30 ff75d4 e8???????? ff45d0 83c72c 8b45d0 }
condition:
7 of them and filesize < 1998848
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8b0e 8d55e0 52 57 57 50 56 } | |
| $sequence_1 | hex | { 8d5dc4 53 83ec10 8bdc 8913 8b9568ffffff 895304 } | |
| $sequence_2 | hex | { 8d45c8 8d8d6cfeffff 50 51 ffd3 50 8d55b0 } | |
| $sequence_3 | hex | { 7510 68???????? 68???????? ff15???????? 8b35???????? 8d8dc4feffff 51 } | |
| $sequence_4 | hex | { 898500020000 53 8d8508020000 50 c7850402000010d01800 ffd6 6a70 } | |
| $sequence_5 | hex | { 8b4604 b900000700 3bc1 7727 7441 3d00000200 743a } | |
| $sequence_6 | hex | { 8bcf e8???????? 8945dc 50 8bce e8???????? 8bf8 } | |
| $sequence_7 | hex | { 5a 899530ffffff be601b0001 8dbd34ffffff a5 a5 } | |
| $sequence_8 | hex | { ab ab ab 8365f400 83c630 8bce c745f009000000 } | |
| $sequence_9 | hex | { 53 ff30 ff75d4 e8???????? ff45d0 83c72c 8b45d0 } |
Condition
7 of them and filesize < 1998848In plain words (Heuristic)
- The file must be smaller than 1998848 (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: 77de712f-509a-5bd9-ac06-6a495b0af267
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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