alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Crypt.CFI.Gen Checkin"; flow:established,to_server; http.method; content:"POST"; nocase; http.user_agent; bsize:3; content:"BIE"; http.request_body; content:"cname="; classtype:command-and-control; sid:2009204; rev:8; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2024_02_09;)