alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP PUP.GigaClicks Checkin"; flow:to_server,established; http.method; content:"POST"; http.uri; content:"/ver/"; content:"/sid/"; http.request_body; content:"instlog="; fast_pattern; http.header_names; content:!"User-Agent|0d 0a|"; reference:md5,942fd71fb26b874502f3ba8546e6c164; classtype:pup-activity; sid:2021099; rev:4; metadata:created_at 2015_05_15, signature_severity Minor, updated_at 2020_08_31;)