YARA · Malpedia signator rules
MALPEDIA_Win_Zupdax_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: Zupdax.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-zupdax-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Zupdax_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "6422642c-ca0a-547b-b9a7-56850329e422"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.zupdax"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.zupdax_auto.yar#L1-L117"
= "N/A"
= "38cddd88ba5cfe2c04dbd9ca80f5282e5e779a0290e6e18141d54b5e589caa5b"
= 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 = { 8bd6 8bc8 2bd1 8bff 0fb708 }
$sequence_1 = { 895e2c e8???????? 8b460c 83c404 }
$sequence_2 = { 4e 81ce00ffffff 46 8a1c06 881c01 881406 0fb61c01 }
$sequence_3 = { 895618 894718 33db 83c61c }
$sequence_4 = { c706ffffffff c74604ffffffff e8???????? 68c8000000 8d4e7c 6a00 }
$sequence_5 = { 895e10 894704 894f08 8b4f14 89570c }
$sequence_6 = { 8b4c2408 8b7e28 51 e8???????? 8b5624 }
$sequence_7 = { 8bf0 8bc7 8d5001 8a08 40 }
$sequence_8 = { 33db 57 3bc3 7419 8b4c2408 8b7e28 51 }
$sequence_9 = { 52 e8???????? 83c408 8b06 50 }
condition:
7 of them and filesize < 1032192
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8bd6 8bc8 2bd1 8bff 0fb708 } | |
| $sequence_1 | hex | { 895e2c e8???????? 8b460c 83c404 } | |
| $sequence_2 | hex | { 4e 81ce00ffffff 46 8a1c06 881c01 881406 0fb61c01 } | |
| $sequence_3 | hex | { 895618 894718 33db 83c61c } | |
| $sequence_4 | hex | { c706ffffffff c74604ffffffff e8???????? 68c8000000 8d4e7c 6a00 } | |
| $sequence_5 | hex | { 895e10 894704 894f08 8b4f14 89570c } | |
| $sequence_6 | hex | { 8b4c2408 8b7e28 51 e8???????? 8b5624 } | |
| $sequence_7 | hex | { 8bf0 8bc7 8d5001 8a08 40 } | |
| $sequence_8 | hex | { 33db 57 3bc3 7419 8b4c2408 8b7e28 51 } | |
| $sequence_9 | hex | { 52 e8???????? 83c408 8b06 50 } |
Condition
7 of them and filesize < 1032192In plain words (Heuristic)
- The file must be smaller than 1032192 (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: 6422642c-ca0a-547b-b9a7-56850329e422
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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