mysql数据库被攻击

好久没有登录我自己的服务器了，今日登录发现mysql数据库沦陷了。我的数据库名字叫linkorganizer，是一个链接管理数据库。旧表已经丢失了，整个数据库只剩下一个warning表，它是黑客留下的。warning表结构如下

mysql> desc warning;
+-----------------+---------+------+-----+---------+-------+
| Field           | Type    | Null | Key | Default | Extra |
+-----------------+---------+------+-----+---------+-------+
| id              | int(11) | NO   | PRI | NULL    |       |
| warning         | text    | YES  |     | NULL    |       |
| Bitcoin_Address | text    | YES  |     | NULL    |       |
| Email           | text    | YES  |     | NULL    |       |
+-----------------+---------+------+-----+---------+-------+
4 rows in set (0.01 sec)

warning字段的内容如下：To recover your lost Database and avoid leaking it: Send us 0.1 Bitcoin (BTC) to our Bitcoin address 17rDr5mbXjLdegWDFuWd61Ymhwm54GjtNK and contact us by Email with your Server IP or Domain name and a Proof of Payment. If you are unsure if we have your data, contact us and we will send you a proof. Your Database is downloaded and backed up on our servers. Backups that we have right now: linkorganizer . If we dont receive your payment in the next 10 Days, we will make your database public or use them otherwise.

比特币地址：17rDr5mbXjLdegWDFuWd61Ymhwm54GjtNK
邮箱：support@mydatabase.to

被攻击的原因很简单，我使用了简单密码，密码长度只有四位。

数据不太重要，我是不可能给他们寄比特币的。