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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_HKTL_NET_GUID_Keethief

Detects c# red/black-team tools via typelibguid

Hack toolSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
Arnim Rupp (https://github.com/ruppde)
Date
2020-12-28
Modified
2025-08-15
Score / Quality
75 / 85

What this rule detects

Detects c# red/black-team tools via typelibguid

Targets: Windows PE.

It defines 5 patterns (5 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
hktl-net-guid-keethief.yarDetection Rule License 1.1
rule SIGNATURE_BASE_HKTL_NET_GUID_Keethief : FILE
{
	meta:
		description = "Detects c# red/black-team tools via typelibguid"
		author = "Arnim Rupp (https://github.com/ruppde)"
		id = "71fef0e9-223a-5834-9d1c-f3fb8b66a809"
		date = "2020-12-28"
		modified = "2025-08-15"
		reference = "https://github.com/GhostPack/KeeThief"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/gen_github_net_redteam_tools_guids.yar#L3614-L3632"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "f91aeb1862b803ae44c398a71e6c6ed0017d28206deffa39e4e0bca8faae6701"
		score = 75
		quality = 85
		tags = "FILE"
		license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"

	strings:
		$typelibguid1lo = "39aa6f93-a1c9-497f-bad2-cc42a61d5710" ascii wide
		$typelibguid3lo = "3fca8012-3bad-41e4-91f4-534aa9a44f96" ascii wide
		$typelibguid4lo = "ea92f1e6-3f34-48f8-8b0a-f2bbc19220ef" ascii wide
		$typelibguid5lo = "c23b51c4-2475-4fc6-9b3a-27d0a2b99b0f" ascii wide
		$typelibguid7lo = "80ba63a4-7d41-40e9-a722-6dd58b28bf7e" ascii wide

	condition:
		( uint16( 0 ) == 0x5A4D and uint32( uint32( 0x3C ) ) == 0x00004550 ) and any of them
}

Strings (5 patterns)

IdentifierTypeValueModifiers
$typelibguid1lotext"39aa6f93-a1c9-497f-bad2-cc42a61d5710"ascii wide
$typelibguid3lotext"3fca8012-3bad-41e4-91f4-534aa9a44f96"ascii wide
$typelibguid4lotext"ea92f1e6-3f34-48f8-8b0a-f2bbc19220ef"ascii wide
$typelibguid5lotext"c23b51c4-2475-4fc6-9b3a-27d0a2b99b0f"ascii wide
$typelibguid7lotext"80ba63a4-7d41-40e9-a722-6dd58b28bf7e"ascii wide

Condition

( uint16( 0 ) == 0x5A4D and uint32( uint32( 0x3C ) ) == 0x00004550 ) and any of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least one pattern in the rule must match.

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References

Licence & attribution

Author: Arnim Rupp (https://github.com/ruppde)

Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a

Licence: Detection Rule License 1.1 (stated in the rule's own meta)

“Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE”

Original rule

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

Rule id: 71fef0e9-223a-5834-9d1c-f3fb8b66a809

Tags:FILE

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