alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING GoogleSheets API V4 Activity (Possible Exfil)"; flow:established,to_server; http.method; content:"PUT"; http.uri; content:"/v4/spreadsheets/"; startswith; content:"/values/"; distance:0; content:"!"; distance:0; content:"valueInputOption|3d|USER_ENTERED"; distance:0; fast_pattern; http.host; bsize:21; content:"sheets.googleapis.com"; http.request_body; content:"|5b 22|"; pcre:"/^[a-f0-9]{8}-([a-f0-9]{4}-){3}[a-f0-9]{12}\x22\x2c/RP"; content:"|22|20"; pcre:"/(?:2[4-9]-[0-9]{2}-[0-9]{2})\s(?:([0-9]{2}:){2}[0-9]{2})\x22/RP"; classtype:bad-unknown; sid:2063452; rev:1; metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_08_19, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_07_14, former_sid 2857976;)