YARA · Malpedia signator rules
MALPEDIA_Win_Voidoor_Auto
autogenerated rule brought to you by yara-signator
MalwareVoidoorMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
- 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: Voidoor.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-voidoor-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Voidoor_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "aba8a76a-42a2-5ac4-9441-bb1b2a2bc429"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.voidoor"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.voidoor_auto.yar#L1-L134"
= "N/A"
= "7b72e80b0081ca865f1c4112c1672273998fb9973e7c23910bfeb94d886f20ca"
= 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 = { c784246803000001010101 c784246c03000001010101 c784247003000001010101 c784247403000001010101 c784247803000001010101 c784247c03000001010101 c784248003000001010101 }
$sequence_1 = { c78580feffff45000000 c78584feffff45000000 c78588feffff45000000 c7459831313131 c7459c31313131 c745a031313131 c745a431313131 }
$sequence_2 = { e8???????? 83c42c 85c0 75a2 56 ff15???????? 57 }
$sequence_3 = { c6450c00 720b ff7524 e8???????? 83c404 8ac3 8b4df4 }
$sequence_4 = { 660fd64008 e8???????? 83c420 52 50 68???????? 57 }
$sequence_5 = { c785c4feffff31313131 c785c8feffff31313131 c785ccfeffff31313131 c785d0feffff31313100 e8???????? 83c404 8bc1 }
$sequence_6 = { c645fc0f e8???????? 83c404 c645fc11 83bd1ceeffff10 720e ffb508eeffff }
$sequence_7 = { ffb42410050000 8d8424a8020000 55 68???????? 6858020000 50 83c305 }
$sequence_8 = { b815000000 0f44f0 ff742418 ff15???????? ff742424 ff15???????? 83c408 }
$sequence_9 = { 33c0 e9???????? c7872811000001000000 8b464c 85c0 7411 50 }
condition:
7 of them and filesize < 1744896
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { c784246803000001010101 c784246c03000001010101 c784247003000001010101 c784247403000001010101 c784247803000001010101 c784247c03000001010101 c7842480030000010101 … | |
| $sequence_1 | hex | { c78580feffff45000000 c78584feffff45000000 c78588feffff45000000 c7459831313131 c7459c31313131 c745a031313131 c745a431313131 } | |
| $sequence_2 | hex | { e8???????? 83c42c 85c0 75a2 56 ff15???????? 57 } | |
| $sequence_3 | hex | { c6450c00 720b ff7524 e8???????? 83c404 8ac3 8b4df4 } | |
| $sequence_4 | hex | { 660fd64008 e8???????? 83c420 52 50 68???????? 57 } | |
| $sequence_5 | hex | { c785c4feffff31313131 c785c8feffff31313131 c785ccfeffff31313131 c785d0feffff31313100 e8???????? 83c404 8bc1 } | |
| $sequence_6 | hex | { c645fc0f e8???????? 83c404 c645fc11 83bd1ceeffff10 720e ffb508eeffff } | |
| $sequence_7 | hex | { ffb42410050000 8d8424a8020000 55 68???????? 6858020000 50 83c305 } | |
| $sequence_8 | hex | { b815000000 0f44f0 ff742418 ff15???????? ff742424 ff15???????? 83c408 } | |
| $sequence_9 | hex | { 33c0 e9???????? c7872811000001000000 8b464c 85c0 7411 50 } |
Condition
7 of them and filesize < 1744896In plain words (Heuristic)
- The file must be smaller than 1744896 (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: aba8a76a-42a2-5ac4-9441-bb1b2a2bc429
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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