alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE DownLoader.30525 Checkin"; flow:established,to_server; content:"POST"; nocase; http_method; content:"/ctrl/ctrv.php"; nocase; http_uri; classtype:command-and-control; sid:2006404; rev:5; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)