alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Daonol C&C Communication"; flow:established,to_server; content:"/x/?0"; http_uri; nocase; content:"|0d 0a|SS|3a|"; nocase; content:"|0d 0a|Xost|3a|"; nocase; pcre:"/\/x\/\?0\w{35}$/U"; reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Win32%2fDaonol; reference:url,blog.fireeye.com/research/2009/10/gumblar-not-gumby.html; reference:url,www.iss.net/threats/gumblar.html; reference:url,blog.scansafe.com/journal/2009/10/15/gumblar-website-botnet-awakes.html; classtype:command-and-control; sid:2010164; rev:6; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2019_07_26;)