alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Trojan-Dropper.Win32.Agent.ksja";
flow:established,to_server;
http.uri;
content:".php?m="; fast_pattern;
pcre:"/\.php\?m=[A-F0-9]{12}/";
http.user_agent; bsize:35;
content:"Mozilla|2f|4|2e|0|20 28|Compatible|3b 20|MSIE|20|6|2e|0|3b 29|";
http.header_names;
content:!"Connection|0d 0a|";
content:!"|0d 0a|Referer|0d 0a|";
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|"; startswith;
content:"|0d 0a|Accept|0d 0a|";
reference:md5,3b440e052da726942763d11cf9e3f72c;
classtype:trojan-activity;
sid:2018507; rev:6;
metadata:created_at 2014_05_29, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_11;
)