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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:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "8e63e9d7-0aa3-54bc-8958-5bb44d9fbb2a"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.kazyloader"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kazyloader_auto.yar#L1-L124"
		license_url = "N/A"
		logic_hash = "34cc9a0cb8805c010ff93ad518256fe67686f6553b5dc947370b69715033db6f"
		score = 75
		quality = 75
		tags = "FILE"
		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"

	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)

IdentifierTypeValueModifiers
$sequence_0hex{ d2 9c 07 06 8e }
$sequence_1hex{ 1309 1109 3a3fffffff 02 09 6f2700000a }
$sequence_2hex{ 6f1a00000a 281b00000a 26 00 de00 }
$sequence_3hex{ 8e 69 58 280100002b }
$sequence_4hex{ 00 08 16 06 06 8e 69 }
$sequence_5hex{ 00 1104 02 6f1f00000a 5a 1105 }
$sequence_6hex{ 6f1400000a 740200001b 0c 1200 06 8e 69 }
$sequence_7hex{ 58 91 1308 1108 20fd000000 59 }
$sequence_8hex{ 282100000a 00 02 08 19 02 6f2200000a }
$sequence_9hex{ 07 04 2804000006 0b 07 281200000a 6f1800000a }

Condition

7 of them and filesize < 50176

In 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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References

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)

Original rule

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

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE