alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ZeroAccess/Max++ Rootkit C&C Activity 2"; flow:established,to_server; content:".php?w="; http_uri; content:"&fail="; http_uri; content:"&i="; http_uri; pcre:"/\.php\?w=\d+&fail=\d+&i=[0-9a-f]{32}$/U"; reference:url,resources.infosecinstitute.com/step-by-step-tutorial-on-reverse-engineering-malware-the-zeroaccessmaxsmiscer-crimeware-rootkit/; reference:url,www.symantec.com/security_response/writeup.jsp?docid=2011-071314-0410-99&tabid=2; reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=TrojanDropper%3aWin32%2fSirefef.B; classtype:command-and-control; sid:2013686; rev:2; metadata:created_at 2011_09_22, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)