alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Netbounce Program Wrapper Download"; flow:established,to_server; http.method; content:"GET"; http.user_agent; content:"Go-http-client/1.1"; bsize:18; http.uri; content:"/progwrapper.exe"; bsize:16; fast_pattern; http.header_names; content:!"Referer"; content:!"Connect"; reference:url,www.fortinet.com/blog/threat-research/netbounce-threat-actor-tries-bold-approach-to-evade-detection; reference:md5,1b4b013948c9af0260409ce7cb7d107b; classtype:trojan-activity; sid:2032226; 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;)