alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Chthonic Checkin"; flow:established,to_server; urilen:6; http.method; content:"POST"; http.uri; content:"/home/"; http.header_names; content:!"Accept-"; content:!"Content-Type"; content:!"Referer"; reference:md5,6afc848066d274d8632c742340560a67; classtype:command-and-control; sid:2017584; rev:9; metadata:created_at 2013_10_12, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_17;)