alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Backdoor.Meciv Checkin"; flow:established,to_server; http.uri; content:"/trandocs/netstat"; nocase; reference:url,us.norton.com/security_response/writeup.jsp?docid=2011-070516-5325-99&tabid=2; reference:url,www.secureworks.com/research/threats/sindigoo/; classtype:command-and-control; sid:2013212; rev:4; metadata:created_at 2011_07_06, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_21;)