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FIREEYE_RT_APT_Loader_MSIL_TRIMBISHOP_1

No description has been set in the source file - FireEye-RT

APT / actorMandiant red team tool countermeasuresBSD 2-Clause LicenseCompila con YARA-X
Autor
FireEye
Fecha
2020-12-03
Modificada
2020-12-09
Puntuación / Calidad
75 / 75

Qué detecta esta regla

No description has been set in the source file - FireEye-RT

Objetivos: PE de Windows.

Define 7 patrones (5 de texto, 2 hex, 0 regex).

Resumen generado a partir de los metadatos y la condición de la regla.

Código de la regla

apt-loader-msil-trimbishop-1.yarBSD 2-Clause License
rule FIREEYE_RT_APT_Loader_MSIL_TRIMBISHOP_1 : FILE
{
	meta:
		description = "No description has been set in the source file - FireEye-RT"
		author = "FireEye"
		id = "1a3f4247-25f4-51ca-b881-209c0753b915"
		date = "2020-12-03"
		date = "2020-12-03"
		modified = "2020-12-09"
		reference = "https://github.com/mandiant/red_team_tool_countermeasures/"
		source_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/rules/TRIMBISHOP/production/yara/APT_Loader_MSIL_TRIMBISHOP_1.yar#L4-L22"
		license_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/LICENSE.txt"
		hash = "e91670423930cbbd3dbf5eac1f1a7cb6"
		logic_hash = "f020efff58c8b7761d700c662c422a9e1ffdf8fe5f6648e421b7c257e3b8d078"
		score = 75
		quality = 75
		tags = "FILE"
		rev = 1

	strings:
		$sb1 = { 28 [2] 00 06 0A 06 7B [2] 00 04 [12-64] 06 7B [2] 00 04 6E 28 [2] 00 06 0B 07 7B [2] 00 04 [12-64] 0? 7B [2] 00 04 0? 7B [2] 00 04 0? 7B [2] 00 04 6E 28 [2] 00 06 0? 0? 7B [2] 00 04 [12-80] 0? 7B [2] 00 04 1? 0? 7B [2] 00 04 }
		$sb2 = { 0F ?? 7C [2] 00 04 28 [2] 00 0A 8C [2] 00 01 [20-80] 28 [2] 00 06 0? 0? 7E [2] 00 0A 28 [2] 00 0A [12-80] 7E [2] 00 0A 13 ?? 0? 7B [2] 00 04 28 [2] 00 0A 0? 28 [2] 00 0A 58 28 [2] 00 0A 13 [1-32] 28 [2] 00 0A [0-32] D0 [2] 00 02 28 [2] 00 0A 28 [2] 00 0A 74 [2] 00 02 }
		$ss1 = "\x00NtMapViewOfSection\x00"
		$ss2 = "\x00NtOpenProcess\x00"
		$ss3 = "\x00NtAlertResumeThread\x00"
		$ss4 = "\x00LdrGetProcedureAddress\x00"
		$tb1 = "\x00DTrim.Execution.DynamicInvoke\x00"

	condition:
		( uint16( 0 ) == 0x5A4D and uint32( uint32( 0x3C ) ) == 0x00004550 ) and ( @sb1 [ 1 ] < @sb2 [ 1 ] ) and ( all of ( $ss* ) ) and ( all of ( $tb* ) )
}

Cadenas (7 patrones)

IdentificadorTipoValorModificadores
$sb1hex{ 28 [2] 00 06 0A 06 7B [2] 00 04 [12-64] 06 7B [2] 00 04 6E 28 [2] 00 06 0B 07 7B [2] 00 04 [12-64] 0? 7B [2] 00 04 0? 7B [2] 00 04 0? 7B [2] 00 04 6E 28 [2] 0 …
$sb2hex{ 0F ?? 7C [2] 00 04 28 [2] 00 0A 8C [2] 00 01 [20-80] 28 [2] 00 06 0? 0? 7E [2] 00 0A 28 [2] 00 0A [12-80] 7E [2] 00 0A 13 ?? 0? 7B [2] 00 04 28 [2] 00 0A 0? 2 …
$ss1texto"\x00NtMapViewOfSection\x00"
$ss2texto"\x00NtOpenProcess\x00"
$ss3texto"\x00NtAlertResumeThread\x00"
$ss4texto"\x00LdrGetProcedureAddress\x00"
$tb1texto"\x00DTrim.Execution.DynamicInvoke\x00"

Condición

( uint16( 0 ) == 0x5A4D and uint32( uint32( 0x3C ) ) == 0x00004550 ) and ( @sb1 [ 1 ] < @sb2 [ 1 ] ) and ( all of ( $ss* ) ) and ( all of ( $tb* ) )

En palabras sencillas (Heurística)

  • El archivo debe empezar por «MZ»: un ejecutable de Windows (PE).
  • Deben coincidir todos los patrones de ( $ss* ).
  • Deben coincidir todos los patrones de ( $tb* ).

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Referencias

Hashes de muestras

Hashes de las muestras que el autor lista en los metadatos de la regla (búscalos en tu plataforma de threat intelligence).

  • e91670423930cbbd3dbf5eac1f1a7cb6

Licencia y atribución

Autor: FireEye

Repositorio de origen: Mandiant red team tool countermeasures @ 3561b71724

Licencia: BSD 2-Clause License (licencia del repositorio)

Aviso de copyright: Copyright (c) 2023, MANDIANT

Regla original

Obtenida a través de YARA Forge 20260927, que añade a los nombres el prefijo de la fuente y campos meta normalizados.

Id de la regla: 1a3f4247-25f4-51ca-b881-209c0753b915

Metadatos

rev1

Etiquetas:FILE