alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Asterope Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?ver="; content:"&id="; distance:0; content:"&os="; distance:0; content:"&res="; distance:0; http.header_names; to_lowercase; content:"|0d 0a|accept-asterope|0d 0a|"; fast_pattern; reference:md5,19190ef53877979191f6889c6a795f31; classtype:command-and-control; sid:2018750; rev:6; metadata:created_at 2014_06_23, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_21;)