alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Win32/Vundo.OD Checkin";
flow:to_server,established;
http.uri;
content:"/get.php?";
pcre:"/^(?:id|key)=/Ri";
content:"id=";
content:"key=";
content:"&os=";
content:"&av=";
content:"&vm=";
content:"&al=";
content:"&p=";
content:"&z=";
http.header_names;
content:!"User-Agent|0d 0a|";
reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Trojan%3AWin32%2FVundo.OD;
reference:md5,8840a0d9d7f4dba3953ccb68b17b2d6c;
classtype:command-and-control;
sid:2016424; rev:6;
metadata:created_at 2011_12_17, malware_family Win32_Vundo_OD, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_23;
)