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SIGNATURE_BASE_HKTL_NET_GUID_Windowsrpcclients

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 7 patterns (7 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
hktl-net-guid-windowsrpcclients.yarDetection Rule License 1.1
rule SIGNATURE_BASE_HKTL_NET_GUID_Windowsrpcclients : FILE
{
	meta:
		description = "Detects c# red/black-team tools via typelibguid"
		author = "Arnim Rupp (https://github.com/ruppde)"
		id = "70fd7431-8c32-52a4-be9f-2a19ef77f2cc"
		date = "2020-12-28"
		modified = "2025-08-15"
		reference = "https://github.com/tyranid/WindowsRpcClients"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/gen_github_net_redteam_tools_guids.yar#L2517-L2536"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "2e99c98514bde102450b119cda3cc3c20d7680de5ccbbf64124b719fb8333e8d"
		score = 75
		quality = 85
		tags = "FILE"
		license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"

	strings:
		$typelibguid0lo = "843d8862-42eb-49ee-94e6-bca798dd33ea" ascii wide
		$typelibguid1lo = "632e4c3b-3013-46fc-bc6e-22828bf629e3" ascii wide
		$typelibguid2lo = "a2091d2f-6f7e-4118-a203-4cea4bea6bfa" ascii wide
		$typelibguid3lo = "950ef8ce-ec92-4e02-b122-0d41d83065b8" ascii wide
		$typelibguid4lo = "d51301bc-31aa-4475-8944-882ecf80e10d" ascii wide
		$typelibguid5lo = "823ff111-4de2-4637-af01-4bdc3ca4cf15" ascii wide
		$typelibguid6lo = "5d28f15e-3bb8-4088-abe0-b517b31d4595" ascii wide

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

Strings (7 patterns)

IdentifierTypeValueModifiers
$typelibguid0lotext"843d8862-42eb-49ee-94e6-bca798dd33ea"ascii wide
$typelibguid1lotext"632e4c3b-3013-46fc-bc6e-22828bf629e3"ascii wide
$typelibguid2lotext"a2091d2f-6f7e-4118-a203-4cea4bea6bfa"ascii wide
$typelibguid3lotext"950ef8ce-ec92-4e02-b122-0d41d83065b8"ascii wide
$typelibguid4lotext"d51301bc-31aa-4475-8944-882ecf80e10d"ascii wide
$typelibguid5lotext"823ff111-4de2-4637-af01-4bdc3ca4cf15"ascii wide
$typelibguid6lotext"5d28f15e-3bb8-4088-abe0-b517b31d4595"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: 70fd7431-8c32-52a4-be9f-2a19ef77f2cc

Tags:FILE

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