alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE EtumBot Registration Request";
flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/image/"; startswith;
content:".jpg"; endswith;
pcre:"/^\x2fimage\x2f[A-Za-z0-9\+_-]+\.jpg$/i";
http.user_agent; bsize:63;
content:"Mozilla/5.0 |28|compatible|3b| MSIE 8.0|3b| Windows NT 6.1|3b| Trident/5.0|29|"; fast_pattern;
http.referer;
content:"http://www.google.com/"; startswith;
reference:url,www.arbornetworks.com/asert/2014/06/illuminating-the-etumbot-apt-backdoor/;
reference:md5,ca838b98ca0f516858a8a523dcd1338d;
classtype:trojan-activity;
sid:2018546; rev:8;
metadata:created_at 2014_06_09, signature_severity Major, updated_at 2024_03_10;
)