alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32.Datamaikon Checkin NewAgent"; flow:established,to_server; http.uri; content:"/index.dat?"; fast_pattern; pcre:"/\/index.dat\?\d{5,9}$/"; http.user_agent; content:"NewAgent"; endswith; reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=TrojanDownloader%3AWin32%2FDatamaikon.gen!A&ThreatID=-2147312276; reference:md5,77d68770fcdc6052bd8d761d14a14f5a; classtype:command-and-control; sid:2014467; rev:5; metadata:created_at 2012_04_04, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_16;)