alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Win32/Adware.Agent.NSF CnC Checkin M1"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"sid="; pcre:"/^[A-F0-9]{12}/UR"; content:"s="; pcre:"/^[A-Z0-9]{9}/UR"; content:"type="; content:"appname="; content:"pos="; content:"pn="; content:"code="; http.user_agent; content:"AppName|3a|"; content:"|3b 20|WinVer|3a|"; distance:0; content:"paX64|3b 20|"; fast_pattern; distance:0; content:"AdapterCount|3a|"; reference:md5,204a7ed84357875d0a94c7b9862c378e; classtype:pup-activity; sid:2039128; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_10_07, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_10_07;)