alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE FRat WebSocket Request M1"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/socket.io/?__sails_io_sdk_version"; http.header; content:"vInfo|3a 20|eyJtSWQiO"; fast_pattern; reference:md5,d10966c3a1d0b5694ee9ce0bb73401e2; classtype:command-and-control; sid:2030279; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_06_10, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_10;)