alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING TA397/Bitter CnC Activity"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"aat|3d|"; startswith; content:"bat|3d|"; content:"cat|3d|Microsoft|2b|Windows|2b|"; fast_pattern; content:"dat|3d|"; reference:md5,f16f2e4317c37085cad630d41001f7c3; classtype:social-engineering; sid:2066319; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Mac_OSX, affected_product Linux, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_12_15, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, tag TA397, updated_at 2025_12_15; target:dest_ip;)