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;
content:"Accept-Asterope|3a|"; fast_pattern;
reference:md5,19190ef53877979191f6889c6a795f31;
classtype:command-and-control;
sid:2018750; rev:5;
metadata:created_at 2014_06_23, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_24;
)