alert http any any -> $HOME_NET any (msg:"ET HUNTING Microsoft Sharepoint Server Insecure Deserialization via Scorecard DataSet Gadget"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"microsoft.performancepoint.scorecards"; fast_pattern; nocase; content:"exceldataset"; nocase; content:"compresseddatatable"; nocase; pcre:"/^(?:\x3d|\x253[dD]|\x26equals\x3b)(?:\x22|\x2522|\x26quot\x3b)H4sIAAAA/R"; reference:url,research.eye.security/sharepoint-under-siege/; classtype:web-application-attack; sid:2063684; rev:1; metadata:affected_product Microsoft_Sharepoint, attack_target Server, tls_state TLSDecrypt, created_at 2025_07_23, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, updated_at 2025_07_23, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)