YARA · Malpedia signator rules
MALPEDIA_Win_Vohuk_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: Vohuk.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-vohuk-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Vohuk_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "fb6b58d3-fa4a-5eee-bc81-fe16f3c6b51f"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.vohuk"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.vohuk_auto.yar#L1-L134"
= "N/A"
= "f4b261500b0d3d44477009b29f1d4f668d5ebc735b2f6389f2d738c0d8340208"
= 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 = { 83fe44 72d3 57 e8???????? 83c404 8b0d???????? ba14102140 }
$sequence_1 = { 8b4508 53 56 57 5f 5e c7004d005d00 }
$sequence_2 = { c7842402010000b100b600 c7842406010000b400fb00 c784240a010000f100e300 c784240e010000fe009900 c784241201000089008d00 c78424160100008700c300 c784241a010000a1008b00 }
$sequence_3 = { 6a4d e8???????? 8d4db8 51 56 ffd0 8bf8 }
$sequence_4 = { b8e7000000 c745f2bd00b400 56 c745f68c008c00 33f6 c745fa90008d00 668945fe }
$sequence_5 = { c740747f013d01 c7407810011401 c7407c4f014c01 c7808000000044014301 c7808400000050014101 c7808800000005014001 c7808c0000004e014601 }
$sequence_6 = { c5fd708560ffffff4e c5fe7f65c0 c5fdfee4 c5d5ef85e0fdffff c5fe7fa5c0fdffff c5ddefe1 c5f572f00c }
$sequence_7 = { 6a20 ff75cc ff9520ffffff 85c0 0f8529010000 8b0d???????? ba43c7bfd0 }
$sequence_8 = { 6a00 6aff ffd0 8b0d???????? ba25000044 688c000000 a3???????? }
$sequence_9 = { 8bf2 8b5508 b908000000 57 8d7ddc f3a5 8a45fb }
condition:
7 of them and filesize < 260096
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 83fe44 72d3 57 e8???????? 83c404 8b0d???????? ba14102140 } | |
| $sequence_1 | hex | { 8b4508 53 56 57 5f 5e c7004d005d00 } | |
| $sequence_2 | hex | { c7842402010000b100b600 c7842406010000b400fb00 c784240a010000f100e300 c784240e010000fe009900 c784241201000089008d00 c78424160100008700c300 c784241a010000a1008b … | |
| $sequence_3 | hex | { 6a4d e8???????? 8d4db8 51 56 ffd0 8bf8 } | |
| $sequence_4 | hex | { b8e7000000 c745f2bd00b400 56 c745f68c008c00 33f6 c745fa90008d00 668945fe } | |
| $sequence_5 | hex | { c740747f013d01 c7407810011401 c7407c4f014c01 c7808000000044014301 c7808400000050014101 c7808800000005014001 c7808c0000004e014601 } | |
| $sequence_6 | hex | { c5fd708560ffffff4e c5fe7f65c0 c5fdfee4 c5d5ef85e0fdffff c5fe7fa5c0fdffff c5ddefe1 c5f572f00c } | |
| $sequence_7 | hex | { 6a20 ff75cc ff9520ffffff 85c0 0f8529010000 8b0d???????? ba43c7bfd0 } | |
| $sequence_8 | hex | { 6a00 6aff ffd0 8b0d???????? ba25000044 688c000000 a3???????? } | |
| $sequence_9 | hex | { 8bf2 8b5508 b908000000 57 8d7ddc f3a5 8a45fb } |
Condition
7 of them and filesize < 260096In plain words (Heuristic)
- The file must be smaller than 260096 (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: fb6b58d3-fa4a-5eee-bc81-fe16f3c6b51f
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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