alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ZeroAccess/Max++ Rootkit C&C Activity 1"; flow:established,to_server; http.uri; content:".php?w="; content:"&i="; distance:0; content:"&a="; distance:0; pcre:"/\.php\?w=\d+&i=[0-9a-f]{32}&a=\d+$/"; 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:2013685; rev:4; metadata:created_at 2011_09_22, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_17;)