alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SERVER Suspected Webshell del Command (Inbound)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".jsp?cmd=del|2b|"; fast_pattern; reference:url,thedfirreport.com/2022/06/06/will-the-real-msiexec-please-stand-up-exploit-leads-to-data-exfiltration/; classtype:web-application-attack; sid:2037005; rev:1; metadata:attack_target Web_Server, created_at 2022_06_16, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_16;)