Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Kuluoz_Auto

autogenerated rule brought to you by yara-signator

MalwareKuluozMalpedia 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: 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:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "9d547d06-c5c9-5c5d-9b60-e3f04bcaaf51"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.kuluoz"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kuluoz_auto.yar#L1-L124"
		license_url = "N/A"
		logic_hash = "559ed6389e34cb8d9e52cf9d35806fb91f16b49944f5ee56fee4ca5cecb87d2e"
		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 = { 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)

IdentifierTypeValueModifiers
$sequence_0hex{ 894dfc 6a40 6800300000 8b55fc 8b4250 50 8b4dfc }
$sequence_1hex{ eb14 837dec00 740e 6a00 6a00 8b45cc 50 }
$sequence_2hex{ 83c201 a1???????? 8910 8d8decfbffff 51 }
$sequence_3hex{ 750d 8b4d08 c7814a12000004000000 c645ff00 8b5508 83ba4e12000001 7558 }
$sequence_4hex{ 8b4008 898564fbffff 8b8d5cfbffff 898decfbffff 8b9560fbffff 8995f0fbffff }
$sequence_5hex{ 8945f0 8b4de8 894df4 8b55ec 8955f8 8b45f0 }
$sequence_6hex{ 8b4508 e9???????? 8b550c 8b02 8b4d0c 034104 8945f0 }
$sequence_7hex{ 8945fc e8???????? 0fb64508 85c0 }
$sequence_8hex{ e8???????? 89852cfeffff 8b852cfeffff 50 }
$sequence_9hex{ 8b4dfc 894df4 8b55f4 813a436d644c 7514 8b45f4 817804696e653a }

Condition

7 of them and filesize < 65536

In 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

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

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: 9d547d06-c5c9-5c5d-9b60-e3f04bcaaf51

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