alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Lost Door Checkin"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:"subject=Lost|20|door|20|"; fast_pattern; content:"by|20|OussamiO"; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|MSIE 6.0|3b 20|Windows NT 5.1|3b 20|SV1)"; depth:55; nocase; classtype:command-and-control; sid:2008340; rev:12; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_14;)