alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Win32/BlackNET CnC Checkin";
flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?vicID="; fast_pattern;
content:"name=";
content:"&os=";
content:"&antivirus=";
content:"&status=";
http.header_names;
content:!"Referer";
reference:md5,16b2192fc64d1cc4347cc505234efbb7;
classtype:command-and-control;
sid:2029178; rev:2;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_12_17, deployment Perimeter, malware_family BlackNET, confidence High, signature_severity Major, updated_at 2019_12_27;
)