alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE JSSLoader Initial Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/?id="; startswith; content:"&type="; http.request_body; content:"AAAAAA=="; content:"AAAAAA=="; distance:0; content:"eyJob3N0Ijoi"; fast_pattern; distance:0; reference:url,malwarebytes.app.box.com/s/ym6r7o5hq0rx2nxjbctfv2sw5vx386ni; classtype:trojan-activity; sid:2038574; rev:1; metadata:attack_target Client_and_Server, created_at 2022_08_19, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_19;)