alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE OtterCookie Host Profile Exfil"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"|2f|socket|2e|io|2f 3f|EIO|3d|"; startswith; http.user_agent; content:"node-XMLHttpRequest"; http.request_body; content:"|7b 22|OS|22 3a 22|"; depth:22; content:"|22 2c 22|platform|22 3a 22|"; distance:0; content:"|22 2c 22|userInfo|22 3a 7b 22|uid|22 3a|"; distance:0; fast_pattern; content:"|22 2c 22|homedir|22 3a 22|"; distance:0; content:"|22 2c 22|shell|22 3a|"; distance:0; reference:url,jp.security.ntt/tech_blog/en-contagious-interview-ottercookie; classtype:command-and-control; sid:2060631; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_03_05, deployment Perimeter, malware_family OtterCookie, confidence High, signature_severity Critical, tag c2, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_03_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)