alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE PhantomPulse RAT Payload Update Attempt"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/v1/updates/check|3f|build|3d|"; startswith; fast_pattern; reference:url,www.elastic.co/security-labs/phantom-in-the-vault; classtype:trojan-activity; sid:2069041; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_04_28, deployment Perimeter, deployment SSLDecrypt, malware_family PhantomPulse_RAT, performance_impact Low, confidence High, signature_severity Major, tag RAT, updated_at 2026_04_28; target:src_ip;)