alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Madness Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"&mk="; fast_pattern; content:"&rs="; content:"&rq="; content:"&ver="; pcre:"/\?uid=\d{8}&ver=\d\.\d{2}&mk=[0-9a-zA-Z]{6}&os=[A-Za-z0-9]+&rs=[a-z]+&c=\d+&rq=\d/"; reference:url,www.arbornetworks.com/asert/2014/01/can-i-play-with-madness/; reference:md5,f1ed53c4665d2893fd116a5b0297fc68; classtype:command-and-control; sid:2018028; rev:6; metadata:created_at 2014_01_28, signature_severity Major, updated_at 2020_10_09;)