alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Nbar.co.kr Related Trojan Checkin"; flow:established,to_server; http.uri; content:"?nid_mac="; content:"&nid_os_ver=Windows"; content:"&nid_ie_ver="; classtype:command-and-control; sid:2008592; rev:5; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_21;)