YARA · Malpedia signator rules
MALPEDIA_Win_Dexbia_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: Dexbia.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-dexbia-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Dexbia_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "87f93d34-dd2c-5eca-8ae6-b1c19054b7d0"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.dexbia"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.dexbia_auto.yar#L1-L121"
= "N/A"
= "200ccc59765b5edb67993adb1a9a999ebeb62a7adbbc126f95da16f834ee9bc6"
= 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 = { 8d8c2460020000 6aff 51 6a00 ff15???????? 50 }
$sequence_1 = { 50 ff15???????? 85c0 755f 53 8d4c240c }
$sequence_2 = { 81c408100000 c3 ff15???????? 6a00 }
$sequence_3 = { 83c020 83e103 8d9424a0120000 f3a4 8d8c24a0260000 51 68???????? }
$sequence_4 = { c744246c01010000 89542478 66895c2470 ff15???????? 8d4c2418 }
$sequence_5 = { 85c0 750c c786a801000001000000 eb0a c786a801000000000000 }
$sequence_6 = { 8b0c8de0b04000 f644c10401 8d04c1 7403 8b00 c3 8325????????00 }
$sequence_7 = { f3a5 b918000000 8d7c2425 f3ab 66ab aa b931000000 }
$sequence_8 = { 8b0485e0b04000 8d04c8 8b0b 8908 }
$sequence_9 = { 8dac24542c0000 aa 8bfd b908000000 be???????? 83c520 }
condition:
7 of them and filesize < 106496
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8d8c2460020000 6aff 51 6a00 ff15???????? 50 } | |
| $sequence_1 | hex | { 50 ff15???????? 85c0 755f 53 8d4c240c } | |
| $sequence_2 | hex | { 81c408100000 c3 ff15???????? 6a00 } | |
| $sequence_3 | hex | { 83c020 83e103 8d9424a0120000 f3a4 8d8c24a0260000 51 68???????? } | |
| $sequence_4 | hex | { c744246c01010000 89542478 66895c2470 ff15???????? 8d4c2418 } | |
| $sequence_5 | hex | { 85c0 750c c786a801000001000000 eb0a c786a801000000000000 } | |
| $sequence_6 | hex | { 8b0c8de0b04000 f644c10401 8d04c1 7403 8b00 c3 8325????????00 } | |
| $sequence_7 | hex | { f3a5 b918000000 8d7c2425 f3ab 66ab aa b931000000 } | |
| $sequence_8 | hex | { 8b0485e0b04000 8d04c8 8b0b 8908 } | |
| $sequence_9 | hex | { 8dac24542c0000 aa 8bfd b908000000 be???????? 83c520 } |
Condition
7 of them and filesize < 106496In plain words (Heuristic)
- The file must be smaller than 106496 (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: 87f93d34-dd2c-5eca-8ae6-b1c19054b7d0
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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