alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP W32/Linkular.Adware Successful Install Beacon (2)"; flow:established,to_server; http.uri; content:"/api/software/?s="; fast_pattern; content:"&os="; content:"&output="; content:"&v="; content:"&l="; content:"&np="; content:"&osv="; content:"&b="; content:"&bv="; content:"&c="; content:"&cv="; reference:url,webroot.com/blog/2014/03/25/deceptive-ads-expose-users-adware-linkularwin32-speedupmypc-puas-potentially-unwanted-applications/; classtype:pup-activity; sid:2018323; rev:6; metadata:attack_target Client_Endpoint, created_at 2014_03_26, deployment Perimeter, signature_severity Minor, tag c2, updated_at 2020_10_12, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)