alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ICEFOG JAVAFOG JAR checkin"; flow:established,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|"; startswith; content:"|0d 0a|Java Version|3a 20|"; distance:0; content:"|0d 0a 20|HostIp|3a 20|"; distance:0; http.header_names; to_lowercase; content:!"|0d 0a|accept-language|0d 0a|"; content:!"|0d 0a|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:8; metadata:created_at 2014_01_15, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_01;)