YARA · Signature Base (Florian Roth / Nextron)
SIGNATURE_BASE_LOG_EXPL_Adselfservice_CVE_2021_40539_ADSLOG_Sep21
Detects suspicious log lines produeced during the exploitation of ADSelfService vulnerability CVE-2021-40539
- Autor
- Florian Roth (Nextron Systems)
- Fecha
- 2021-09-20
- Modificada
- 2023-12-05
- Puntuación / Calidad
- 70 / 85
Qué detecta esta regla
Detects suspicious log lines produeced during the exploitation of ADSelfService vulnerability CVE-2021-40539
Define 1 patrones (1 de texto, 0 hex, 0 regex).
Resumen generado a partir de los metadatos y la condición de la regla.
Código de la regla
rule SIGNATURE_BASE_LOG_EXPL_Adselfservice_CVE_2021_40539_ADSLOG_Sep21 : LOG CVE_2021_40539 FILE
{
meta:
= "Detects suspicious log lines produeced during the exploitation of ADSelfService vulnerability CVE-2021-40539"
= "Florian Roth (Nextron Systems)"
= "156317c6-e726-506d-8b07-4f74dae2807f"
= "2021-09-20"
= "2023-12-05"
= "https://us-cert.cisa.gov/ncas/alerts/aa21-259a"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/expl_adselfservice_cve_2021_40539.yar#L2-L14"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
= "49b7857187c15f48e928747266adca44c227964cef72914616ea269b0e88fe73"
= 70
= 85
= "LOG, CVE-2021-40539, FILE"
strings:
$x1 = "Java traceback errors that include references to NullPointerException in addSmartCardConfig or getSmartCardConfig" ascii wide
condition:
filesize < 50MB and 1 of them
}
Cadenas (1 patrones)
| Identificador | Tipo | Valor | Modificadores |
|---|---|---|---|
| $x1 | texto | "Java traceback errors that include references to NullPointerException in addSmartCardConfig or getSmartCardConfig" | ascii wide |
Condición
filesize < 50MB and 1 of themEn palabras sencillas (Heurística)
- El archivo debe ocupar menos de 50MB (un límite barato que descarta archivos grandes).
- Deben coincidir al menos 1 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: Florian Roth (Nextron Systems)
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: 156317c6-e726-506d-8b07-4f74dae2807f
Etiquetas:LOGCVE_2021_40539FILE
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