alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP W32/WinWrapper.Adware Initial Install Beacon"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/api.cgi?act="; fast_pattern; content:"&appid="; content:"&ts="; content:"&dlip="; content:"&dlid="; content:"&proto="; http.user_agent; content:"NSIS_Inetc (Mozilla)"; depth:20; http.header_names; content:!"Referer"; reference:md5,2d71e44c02784d579fb4af18bbbeae6c; classtype:pup-activity; sid:2020627; rev:7; metadata:attack_target Client_Endpoint, created_at 2015_03_06, deployment Perimeter, signature_severity Minor, tag c2, updated_at 2020_08_31, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)