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DITEKSHEN_MALWARE_Win_Kutaki

Detects Kutaki

MalwareKutakiditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2020-11-06
Modified
2024-11-01
Score / Quality
75 / 75

What this rule detects

Detects Kutaki

Associated malware family: Kutaki.

Targets: Windows PE.

It defines 6 patterns (6 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-kutaki.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Kutaki : FILE
{
	meta:
		description = "Detects Kutaki"
		author = "ditekSHen"
		id = "d91812bb-4564-56b5-9757-81255b5233fb"
		date = "2020-11-06"
		modified = "2024-11-01"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L8160-L8173"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "24fbc9ca6de421275813c285a8fca91cfcede48f4b4de9feda010c644f0c251f"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$x1 = "AASEaHR0cDovL29qb3JvYmlhLmNsdWIvbGFwdG9wL2xhcHRvcC5waHA" ascii
		$x2 = "aHR0cDovL3RlcmViaW5uYWhpY2MuY2x1Yi9zZWMva29vbC50eHQ" ascii
		$s1 = "wewqeuuiwe[XXXXXXX]" ascii
		$s2 = "alt|aHR0cD" ascii
		$s3 = "<rdf:Description about='uuid:fb761dc9-9daf-11d9-9a32-fcf1da45dca2'" ascii
		$s4 = "<rdf:Description about='uuid:0ab54f47-96d6-11d9-a59c-cbc93330e07e'" ascii

	condition:
		uint16( 0 ) == 0x5a4d and ( ( 1 of ( $x* ) and 1 of ( $s* ) ) or ( all of ( $s* ) ) )
}

Strings (6 patterns)

IdentifierTypeValueModifiers
$x1text"AASEaHR0cDovL29qb3JvYmlhLmNsdWIvbGFwdG9wL2xhcHRvcC5waHA"ascii
$x2text"aHR0cDovL3RlcmViaW5uYWhpY2MuY2x1Yi9zZWMva29vbC50eHQ"ascii
$s1text"wewqeuuiwe[XXXXXXX]"ascii
$s2text"alt|aHR0cD"ascii
$s3text"<rdf:Description about='uuid:fb761dc9-9daf-11d9-9a32-fcf1da45dca2'"ascii
$s4text"<rdf:Description about='uuid:0ab54f47-96d6-11d9-a59c-cbc93330e07e'"ascii

Condition

uint16( 0 ) == 0x5a4d and ( ( 1 of ( $x* ) and 1 of ( $s* ) ) or ( all of ( $s* ) ) )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • All patterns in ( $s* ) must match.
  • At least 1 patterns in ( $x* ) must match.
  • At least 1 patterns in ( $s* ) must match.

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References

Licence & attribution

Author: ditekSHen

Source repository: ditekSHen detection @ e76c93dcde

Licence: BSD 2-Clause License (repository licence)

Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: d91812bb-4564-56b5-9757-81255b5233fb

Tags:FILE

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