前些日子看阿里云便宜，买了一个，安装了一个mongodb，自己连着做调试。
好久没用了，今天突然惊喜的发现被黑客登录了。没想到居然还有人靠这么低级的漏洞混饭吃。
被黑的表现如下：

> show dis
HOW_TO_RESTORE_mydb1  0.078GB
HOW_TO_RESTORE_mydb2  0.078GB
README                0.078GB
local                 0.078GB
mydb1                 0.453GB
mydb2                 0.453GB

其中mydb1的数据和mydb2的数据都被清空了。
从mongodb，黑客来自美国：

删除数据库的时间是：4:27
其中HOW_TO_RESTORE_mydb1、HOW_TO_RESTORE_mydb2、README存储的是勒索信息。勒索信息如下：

> use HOW_TO_RESTORE_mydb1
switched to db HOW_TO_RESTORE_mydb1
> show tables;
HOW_TO_RESTORE
system.indexes
> db.HOW_TO_RESTORE.findOne();
{
    "_id" : ObjectId("5d95544778e531762eb557c2"),
    "What_happend" : "Your DB was saved and archived, you have 7 days to restore it.",
    "___" : "",
    "How_to_restore" : "Send 0.125 Bitcoin to address bellow",
    "pay_to_btc_address" : "19Ng6XNfCo9pdzDred8ztgWf9BbpTiBr6M",
    "email_to" : "Send email to baseshaver@criptext.com OR baseshaver@elude.in with your ID-code and transaction link! More info on links below!",
    "YOUR_ID_CODE" : "5c487d7b3cce97442e95825b5c487d7b3cce9744",
    "get_db_back" : "You will get your db archive back immediately right after we receive an email and check payment.",
    "TIME" : "you have 7 days to pay, then DB will be published on private hack forum and deleted from our HDDs.",
    "contact_problems" : "If you not get answer in 12 hours or get errors when sending letters use reserve emails or check MORE_INFO for another contacts:",
    "reserve_emails" : "baseshaver@protonmail.com | baseshaver@keemail.me | baseshaver@inbox.lv |  baseshaver@yandex.com | baseshaver@secmail.pro | baseshaver@lycos.com",
    "MORE_INFO" : "You can find more information here: https://anotepad.com/note/read/53sex69b OR https://onlinenotepad.us/LAeK8dBJc8 ",
    "____" : "",
    "Where_to_buy_btc" : "List below of exchanges where you can buy BTC in next collection!",
    "BTC_Exchanges" : " localbitcoins.com | paxful.com | payments.changelly.com | wirex.com | abra.com | coinmama.com ",
    "BTC_Guides" : " https://www.buybitcoinworldwide.com/ | https://en.bitcoin.it/wiki/Main_Page "
}

> use README
switched to db README
> show tables;
README
system.indexes
> db.README.findOne();
{
    "_id" : ObjectId("5a460f404186ec47a8181643"),
    "Bitcoin" : "16NHQZe81LqTPfekW3VXvnyZcFLR37VyHi",
    "Email" : "4b4340f8c832472e902b5482bcfdedfa@protonmail.com",
    "Exchange" : "https://localbitcoins.com",
    "Solution" : "Your database has been downloaded and backed up on our secured servers. To recover your lost data: Send 0.1 BTC to our Bitcoin address and contact us by email with your MongoDB server IP address and proof of payment."
}

解决方法大家都应该知道，设置密码，改端口，新建用户跑mongodb，只监听127.0.0.1，设置防火墙等。就不多说了。