alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Worm.VBS.ayr CnC command (is-cmd-shell)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/is-cmd-shell"; fast_pattern; nocase; http.user_agent; content:"|3c 7c 3e|"; reference:url,www.fireeye.com/blog/uncategorized/2013/09/now-you-see-me-h-worm-by-houdini.html; classtype:command-and-control; sid:2017522; rev:5; metadata:created_at 2013_09_25, signature_severity Major, updated_at 2024_03_04, reviewed_at 2024_05_03;)