自己搭了个opensearch的单节点，很快就被黑了，上面看到了一个readme,内容是这个，设置了密码了 
Your database has been deleted from your server, but all the information remains stored on our cluster. The instructions for recovery are as follows: You must send 0.0041 BTC to the following wallet: bc1q38rjul6gdamfflf6p4ukz0ymtvfgfv2j9saf6r . Then, you must send an email to wendy.etabw@gmx.com with the following code: 0SH7HH1Q72JL (it is imp...