Suspicious SharePoint ToolPane Endpoint Request via ToolShell (via webserver)
- Category
- webserver
- Author
- HuntRule
- Published
- 2026-05-04
- Updated
- 2026-08-28
ATT&CK techniques
Initial AccessRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects HTTP requests to the SharePoint ToolPane.aspx endpoint carrying the DisplayMode Edit parameter, the exploitation vector for ToolShell (CVE-2025-53770). Attackers send crafted requests to this endpoint to bypass authentication and achieve remote code execution. Requests to this endpoint with an edit display mode are a strong indicator of exploitation attempts.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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