alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Blackenergy Bot Checkin to C&C (2)"; flow:established,to_server; http.method; content:"POST"; nocase; http.host; content:!".bitdefender.net"; http.content_len; byte_test:0,<=,200,0,string,dec; http.request_body; content:"id="; nocase; startswith; content:"&cn="; nocase; content:"&bid="; nocase; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; classtype:command-and-control; sid:2010875; rev:16; metadata:created_at 2010_07_30, deprecation_reason Age, signature_severity Major, updated_at 2024_04_27, reviewed_at 2024_02_28;)