alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET USER_AGENTS Downloader User-Agent HTTPGET";
flow:established,to_server;
http.user_agent;
content:"HTTPGET"; depth:7;
http.host;
content:!"autodesk.com"; endswith;
content:!"rsa.com"; endswith;
content:!"consumersentinel.gov"; endswith;
content:!"technet.microsoft.com"; endswith;
content:!"metropolis.com"; endswith;
content:!"www.catalog.update.microsoft.com"; endswith;
classtype:trojan-activity;
sid:2013508; rev:14;
metadata:created_at 2011_08_31, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_15;
)