SIGNATURE_BASE_APT_EXPL_Sharepoint_CVE_2025_53770_Forensicartefact_Jul25_1

rule SIGNATURE_BASE_APT_EXPL_Sharepoint_CVE_2025_53770_Forensicartefact_Jul25_1 : CVE_2025_53770
{
	meta:
		description = "Detects URIs accessed during the exploitation of SharePoint RCE vulnerability CVE-2025-53770"
		author = "Florian Roth"
		id = "06ad76ef-fc9c-5251-a7c0-cbbb66d79b0e"
		date = "2025-07-20"
		modified = "2025-07-23"
		reference = "https://research.eye.security/sharepoint-under-siege/"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/expl_sharepoint_jul25.yar#L55-L74"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "cca885bad087d1ed12f00ccad558bb474027f7cce058be76360df31c9499e771"
		score = 75
		quality = 81
		tags = "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
}