alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Win32/Enchanim Checkin";
flow:established,to_server;
http.method;
content:"GET"; nocase;
http.uri;
content:"svchost.exe"; fast_pattern;
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|MSIE 5.01|3b 20|Windows NT 5.0)";
reference:md5,539d3b15e9c3882ac70bb1ac7f90a837;
classtype:command-and-control;
sid:2016707; rev:6;
metadata:created_at 2013_04_01, malware_family Win32_Enchanim, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_18;
)