alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Netbounce Proxy User-Agent (idk)"; flow:established,to_server; http.user_agent; content:"idk"; bsize:3; fast_pattern; reference:url,www.fortinet.com/blog/threat-research/netbounce-threat-actor-tries-bold-approach-to-evade-detection; reference:md5,1b4b013948c9af0260409ce7cb7d107b; classtype:trojan-activity; sid:2032225; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_03_19, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_19;)