alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Backdoor.Win32/Momibot Checkin"; flow:established,to_server; http.method; content:"POST"; nocase; http.uri; content:"/index.php"; http.request_body; content:"byE8PCdtbzE6PTU8czo3"; reference:url,hypersecurity.blogspot.com/2011/08/uncovering-win32momibot-communication.html; classtype:command-and-control; sid:2013398; rev:6; metadata:created_at 2011_08_11, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_21;)