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; to_lowercase; content:"x-crypto-version"; fast_pattern; content:!"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; reference:md5,62a4d32dcb1c495c5583488638452ff9; classtype:pup-activity; sid:2021283; rev:8; metadata:created_at 2015_06_16, signature_severity Minor, updated_at 2024_04_21;)