YARA · Signature Base (Florian Roth / Nextron)
SIGNATURE_BASE_MAL_APT_NK_Trifaux_Easyrat_JUPITER
Detects a variant of the EasyRAT malware family
- Autor
- CISA.gov
- Fecha
- 2024-07-25
- Modificada
- 2026-01-29
- Puntuación / Calidad
- 80 / 85
Qué detecta esta regla
Detects a variant of the EasyRAT malware family
Familia de malware asociada: Jupiter.
Objetivos: PE de Windows.
Define 3 patrones (2 de texto, 1 hex, 0 regex).
Resumen generado a partir de los metadatos y la condición de la regla.
Código de la regla
rule SIGNATURE_BASE_MAL_APT_NK_Trifaux_Easyrat_JUPITER : FILE
{
meta:
= "Detects a variant of the EasyRAT malware family"
= "CISA.gov"
= "8bd72287-59da-53cf-9015-66149303e59f"
= "2024-07-25"
= "2026-01-29"
= "https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-207a"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_nk_andariel_jul24.yar#L44-L59"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
= "6108035dbebd34fe994fc1f8b4123321321f6ed5c022be6e84a88f905ea6fb73"
= 80
= 85
= "FILE"
strings:
$InitOnce = "InitOnceExecuteOnce"
$BREAK = { 0D 00 0A 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 0D 00 0A }
$Bytes = "4C,$00,$00,$00,$01,$14,$02,$00,$00,$00,$00,$00,$C0,$00,$00,$00,$00,$00,$00," wide
condition:
uint16( 0 ) == 0x5a4d and all of them
}
Cadenas (3 patrones)
| Identificador | Tipo | Valor | Modificadores |
|---|---|---|---|
| $InitOnce | texto | "InitOnceExecuteOnce" | |
| $BREAK | hex | { 0D 00 0A 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D 00 2D … | |
| $Bytes | texto | "4C,$00,$00,$00,$01,$14,$02,$00,$00,$00,$00,$00,$C0,$00,$00,$00,$00,$00,$00," | wide |
Condición
uint16( 0 ) == 0x5a4d and all of themEn palabras sencillas (Heurística)
- El archivo debe empezar por «MZ»: un ejecutable de Windows (PE).
- Deben coincidir todos los patrones de la regla.
Prueba esta regla en tu navegador
Arrastra un archivo para escanearlo con esta regla usando YARA-X compilado a WebAssembly. No se sube nada.
Licencia y atribución
Autor: CISA.gov
Repositorio de origen: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a
Licencia: Detection Rule License 1.1 (licencia del repositorio)
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: 8bd72287-59da-53cf-9015-66149303e59f
Etiquetas:FILE
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