alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE BANLOAD Downloader GET Checkin"; flow:established,to_server; content:"GET"; nocase; http_method; content:"mac="; http_uri; content:"sys="; http_uri; content:"yp="; http_uri; content:"rand="; http_uri; nocase; pcre:"/mac=[0-9A-Fa-f]{12}&/Ui"; reference:url,www.sophos.com/security/analyses/viruses-and-spyware/trojbanloe.html; classtype:command-and-control; sid:2009453; rev:6; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)