YARA · Malpedia signator rules
MALPEDIA_Win_Kuluoz_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: Kuluoz.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-kuluoz-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Kuluoz_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "9d547d06-c5c9-5c5d-9b60-e3f04bcaaf51"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.kuluoz"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kuluoz_auto.yar#L1-L124"
= "N/A"
= "559ed6389e34cb8d9e52cf9d35806fb91f16b49944f5ee56fee4ca5cecb87d2e"
= 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 = { 894dfc 6a40 6800300000 8b55fc 8b4250 50 8b4dfc }
$sequence_1 = { eb14 837dec00 740e 6a00 6a00 8b45cc 50 }
$sequence_2 = { 83c201 a1???????? 8910 8d8decfbffff 51 }
$sequence_3 = { 750d 8b4d08 c7814a12000004000000 c645ff00 8b5508 83ba4e12000001 7558 }
$sequence_4 = { 8b4008 898564fbffff 8b8d5cfbffff 898decfbffff 8b9560fbffff 8995f0fbffff }
$sequence_5 = { 8945f0 8b4de8 894df4 8b55ec 8955f8 8b45f0 }
$sequence_6 = { 8b4508 e9???????? 8b550c 8b02 8b4d0c 034104 8945f0 }
$sequence_7 = { 8945fc e8???????? 0fb64508 85c0 }
$sequence_8 = { e8???????? 89852cfeffff 8b852cfeffff 50 }
$sequence_9 = { 8b4dfc 894df4 8b55f4 813a436d644c 7514 8b45f4 817804696e653a }
condition:
7 of them and filesize < 65536
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 894dfc 6a40 6800300000 8b55fc 8b4250 50 8b4dfc } | |
| $sequence_1 | hex | { eb14 837dec00 740e 6a00 6a00 8b45cc 50 } | |
| $sequence_2 | hex | { 83c201 a1???????? 8910 8d8decfbffff 51 } | |
| $sequence_3 | hex | { 750d 8b4d08 c7814a12000004000000 c645ff00 8b5508 83ba4e12000001 7558 } | |
| $sequence_4 | hex | { 8b4008 898564fbffff 8b8d5cfbffff 898decfbffff 8b9560fbffff 8995f0fbffff } | |
| $sequence_5 | hex | { 8945f0 8b4de8 894df4 8b55ec 8955f8 8b45f0 } | |
| $sequence_6 | hex | { 8b4508 e9???????? 8b550c 8b02 8b4d0c 034104 8945f0 } | |
| $sequence_7 | hex | { 8945fc e8???????? 0fb64508 85c0 } | |
| $sequence_8 | hex | { e8???????? 89852cfeffff 8b852cfeffff 50 } | |
| $sequence_9 | hex | { 8b4dfc 894df4 8b55f4 813a436d644c 7514 8b45f4 817804696e653a } |
Condition
7 of them and filesize < 65536In plain words (Heuristic)
- The file must be smaller than 65536 (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: 9d547d06-c5c9-5c5d-9b60-e3f04bcaaf51
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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