alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Fareit Checkin 2"; flow:to_server,established; urilen:20; http.method; content:"POST"; http.uri; content:"/forum/viewtopic.php"; endswith; http.user_agent; content:"Windows 98)"; endswith; fast_pattern; http.content_type; content:"application/octet-stream"; reference:md5,10baa5250610fc2b5b2cdf932f2007c0; classtype:command-and-control; sid:2016550; rev:8; metadata:created_at 2013_01_12, malware_family Win32_Fareit, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_15;)