alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Win32/TrojanClicker Variant Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/test/err.asp?alerr="; startswith; fast_pattern; content:"&time="; distance:0; http.host; content:".cn"; endswith; reference:md5,f990d21e020f4130e58d49cc368921b1; classtype:pup-activity; sid:2033168; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_06_23, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_23;)