YARA · Signature Base (Florian Roth / Nextron)
SIGNATURE_BASE_APT_EXPL_Sharepoint_CVE_2025_53770_Forensicartefact_Jul25_1
Detects URIs accessed during the exploitation of SharePoint RCE vulnerability CVE-2025-53770
- Autor
- Florian Roth
- Fecha
- 2025-07-20
- Modificada
- 2025-07-23
- Puntuación / Calidad
- 75 / 81
Qué detecta esta regla
Detects URIs accessed during the exploitation of SharePoint RCE vulnerability CVE-2025-53770
Define 4 patrones (2 de texto, 0 hex, 2 regex).
Resumen generado a partir de los metadatos y la condición de la regla.
Código de la regla
rule SIGNATURE_BASE_APT_EXPL_Sharepoint_CVE_2025_53770_Forensicartefact_Jul25_1 : CVE_2025_53770
{
meta:
= "Detects URIs accessed during the exploitation of SharePoint RCE vulnerability CVE-2025-53770"
= "Florian Roth"
= "06ad76ef-fc9c-5251-a7c0-cbbb66d79b0e"
= "2025-07-20"
= "2025-07-23"
= "https://research.eye.security/sharepoint-under-siege/"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/expl_sharepoint_jul25.yar#L55-L74"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
= "cca885bad087d1ed12f00ccad558bb474027f7cce058be76360df31c9499e771"
= 75
= 81
= "CVE-2025-53770"
strings:
$sa1 = /POST \/_layouts\/1[0-9]\/ToolPane\.aspx/ ascii wide nocase
$sa2 = "DisplayMode=Edit&a=/ToolPane.aspx" ascii wide
$sb1 = /GET \/_layouts\/1[0-9]\/spinstall/ ascii wide
$sb2 = "/_layouts/SignOut.aspx 200" ascii wide nocase
condition:
(@sa2 - @sa1 ) < 700 or ( @sb2 - @sb1 ) < 700 or ( @sb2 - @sa1 ) < 700
}
Cadenas (4 patrones)
| Identificador | Tipo | Valor | Modificadores |
|---|---|---|---|
| $sa1 | regex | /POST \/_layouts\/1[0-9]\/ToolPane\.aspx/ | ascii wide nocase |
| $sa2 | texto | "DisplayMode=Edit&a=/ToolPane.aspx" | ascii wide |
| $sb1 | regex | /GET \/_layouts\/1[0-9]\/spinstall/ | ascii wide |
| $sb2 | texto | "/_layouts/SignOut.aspx 200" | ascii wide nocase |
Condición
(@sa2 - @sa1 ) < 700 or ( @sb2 - @sb1 ) < 700 or ( @sb2 - @sa1 ) < 700Prueba 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
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: 06ad76ef-fc9c-5251-a7c0-cbbb66d79b0e
Etiquetas:CVE_2025_53770
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