alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE ICEFOG JAVAFOG JAR checkin";
flow:to_server;
http.method;
content:"POST";
http.uri;
content:"?title=2.0_-"; fast_pattern;
http.user_agent;
content:"Java"; startswith;
http.request_body;
content:"content=HostName|3a 20|"; depth:18;
content:"|0d 0a|Java Version|3a 20|"; distance:0;
content:"|0d 0a 20|HostIp|3a 20|"; distance:0;
http.header_names;
content:!"Accept-Language|0d 0a|";
content:!"Referer|0d 0a|";
reference:url,www.securelist.com/en/blog/208214213/The_Icefog_APT_Hits_US_Targets_With_Java_Backdoor;
reference:url,jsunpack.jeek.org/dec/go?report=6b63068d3259f5032a301e0d3f935b4d3f2e2998;
classtype:command-and-control;
sid:2017972; rev:6;
metadata:created_at 2014_01_15, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_22;
)