alert http $HOME_NET any -> any any (msg:"ET MALWARE TeamPCP CanisterWorm - Namastex npm Campaign - Exfiltration"; flow:established,to_server; http.request_line; content:"POST /v1/telemetry HTTP/1.1"; http.content_type; content:"application/json"; http.header; content:"x-seesion-id|3a 20|"; nocase; content:"x-request-signature|3a 20|"; fast_pattern; nocase; reference:url,socket.dev/blog/namastex-npm-packages-compromised-canisterworm; classtype:trojan-activity; sid:2068941; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_04_23, deployment Perimeter, confidence High, signature_severity Major, tag c2, updated_at 2026_04_23, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)