alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET EXPLOIT Possible MPC Sharj 3.11.1 - Arbitrary File Download Attempt"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/download.php?id="; fast_pattern; pcre:"/^(?:==[A-Z0-9+/]{2}|=[A-Z0-9+/]{3}|[A-Z0-9+/]{4})(?:[A-Z0-9+/]{4})*$/Ri"; content:"L"; endswith; reference:url,www.exploit-db.com/exploits/48433; classtype:attempted-admin; sid:2030115; rev:1; metadata:attack_target Web_Server, created_at 2020_05_06, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_06;)