alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE WEBC2-RAVE UA"; flow:established,to_server; http.user_agent; content:"HTTP Mozilla/5.0(compatible+MSIE)"; depth:33; endswith; reference:url,www.mandiant.com/apt1; reference:md5,5bcaa2f4bc7567f6ffd5507a161e221a; classtype:command-and-control; sid:2016458; rev:5; metadata:created_at 2013_02_22, signature_severity Major, updated_at 2020_10_14;)