YARA · Malpedia signator rules
MALPEDIA_Win_Kazyloader_Auto
autogenerated rule brought to you by yara-signator
MalwareKazyloaderMalpedia 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: Kazyloader.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-kazyloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Kazyloader_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "8e63e9d7-0aa3-54bc-8958-5bb44d9fbb2a"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.kazyloader"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kazyloader_auto.yar#L1-L124"
= "N/A"
= "34cc9a0cb8805c010ff93ad518256fe67686f6553b5dc947370b69715033db6f"
= 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 = { d2 9c 07 06 8e }
$sequence_1 = { 1309 1109 3a3fffffff 02 09 6f2700000a }
$sequence_2 = { 6f1a00000a 281b00000a 26 00 de00 }
$sequence_3 = { 8e 69 58 280100002b }
$sequence_4 = { 00 08 16 06 06 8e 69 }
$sequence_5 = { 00 1104 02 6f1f00000a 5a 1105 }
$sequence_6 = { 6f1400000a 740200001b 0c 1200 06 8e 69 }
$sequence_7 = { 58 91 1308 1108 20fd000000 59 }
$sequence_8 = { 282100000a 00 02 08 19 02 6f2200000a }
$sequence_9 = { 07 04 2804000006 0b 07 281200000a 6f1800000a }
condition:
7 of them and filesize < 50176
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { d2 9c 07 06 8e } | |
| $sequence_1 | hex | { 1309 1109 3a3fffffff 02 09 6f2700000a } | |
| $sequence_2 | hex | { 6f1a00000a 281b00000a 26 00 de00 } | |
| $sequence_3 | hex | { 8e 69 58 280100002b } | |
| $sequence_4 | hex | { 00 08 16 06 06 8e 69 } | |
| $sequence_5 | hex | { 00 1104 02 6f1f00000a 5a 1105 } | |
| $sequence_6 | hex | { 6f1400000a 740200001b 0c 1200 06 8e 69 } | |
| $sequence_7 | hex | { 58 91 1308 1108 20fd000000 59 } | |
| $sequence_8 | hex | { 282100000a 00 02 08 19 02 6f2200000a } | |
| $sequence_9 | hex | { 07 04 2804000006 0b 07 281200000a 6f1800000a } |
Condition
7 of them and filesize < 50176In plain words (Heuristic)
- The file must be smaller than 50176 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
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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: 8e63e9d7-0aa3-54bc-8958-5bb44d9fbb2a
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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