alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP PUP Win32/DownloadAssistant.A Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/launch/"; endswith; http.header_names; content:"X-Crypto-Version"; fast_pattern; content:!"User-Agent"; content:!"Referer"; reference:md5,62a4d32dcb1c495c5583488638452ff9; classtype:pup-activity; sid:2021283; rev:7; metadata:created_at 2015_06_16, signature_severity Minor, updated_at 2020_09_17;)