alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET EXPLOIT Metasploit Plugin-Detect Posting Data 4";
flow:established,to_server;
http.method;
content:"POST";
http.request_body;
content:"b3NfbmFtZT"; depth:10; fast_pattern;
pcre:"/^[A-Za-z0-9+/]{2}(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/R";
reference:url,github.com/rapid7/metasploit-framework/wiki/How-to-write-a-browser-exploit-using-BrowserExploitServer;
classtype:trojan-activity;
sid:2020751; rev:3;
metadata:affected_product Any, attack_target Client_and_Server, created_at 2015_03_26, deployment Perimeter, deployment Internet, deployment Internal, deployment Datacenter, signature_severity Critical, tag Metasploit, updated_at 2020_05_19;
)