SearchLeak CSP Bypass via Bing Search-by-Image SSRF Exfiltration Proxy
This rule detects potential data exfiltration through the Bing Image Search 'search-by-image' feature. It identifies web traffic to Bing that contains an 'imgurl' parameter, decodes the URL, and filters out legitimate Microsoft-related domains. It then flags suspicious, potentially encoded file paths or data structures that might indicate the use of this public service to exfiltrate or host staging data.
Splunk (SPL)
