alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE APT/TransparentTribe CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"=explorer!"; fast_pattern; content:"!!&"; distance:0; content:"!!&"; distance:0; content:"!!&"; distance:0; content:"!!&"; distance:0; content:"!!&"; distance:0; content:"=Microsoft+Windows+"; distance:0; http.header_names; content:!"Referer"; content:!"User-Agent"; reference:md5,77549b8211c05fdf9114b09d38e88d98; classtype:command-and-control; sid:2029242; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_01_09, deployment Perimeter, malware_family TransparentTribe, confidence High, signature_severity Major, updated_at 2020_01_09;)