alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Metasploit Framework Checking For Update"; flow:established,to_server; urilen:13; http.method; content:"POST"; http.uri; content:"/updateserver"; fast_pattern; http.user_agent; content:"MSFX/"; depth:5; http.header_names; content:!"Referer"; classtype:misc-activity; sid:2020475; rev:7; metadata:affected_product Any, attack_target Client_and_Server, created_at 2015_02_19, deployment Perimeter, deployment Internet, deployment Internal, deployment Datacenter, confidence High, signature_severity Informational, tag Metasploit, updated_at 2023_05_03;)