最近公司部分帳號信箱會一直收到這樣的勒索信，郵件是由國外隨意IP寄出
郵件"寄件者"跟"收件者"都是自己，原本懷疑是郵件密碼被破解，結果更改過密碼後
還是持續收到。公司郵件伺服器架設在內部，這會是什麼問題?

郵件內文如下:

Hello!

I'm a programmer who cracked your email account and device about half year ago.
You entered a password on one of the insecure site you visited, and I catched it.

Of course you can will change your password, or already made it.
But it doesn't matter, my rat software update it every time.

Please don't try to contact me or find me, it is impossible, since I sent you an email from your email account.

Through your e-mail, I uploaded malicious code to your Operation System.
I saved all of your contacts with friends, colleagues, relatives and a complete history of visits to the Internet resources.
Also I installed a rat software on your device and long tome spying for you.

You are not my only victim, I usually lock devices and ask for a ransom.
But I was struck by the sites of intimate content that you very often visit.

I am in shock of your reach fantasies! Wow! I've never seen anything like this!
I did not even know that SUCH content could be so exciting!

So, when you had fun on intime sites (you know what I mean!)
I made screenshot with using my program from your camera of yours device.
After that, I jointed them to the content of the currently viewed site.

Will be funny when I send these photos to your contacts! And if your relatives see it?
BUT I'm sure you don't want it. I definitely would not want to ...

I will not do this if you pay me a little amount.
I think $823 is a nice price for it!

I accept only Bitcoins.
My BTC wallet: 17XHRucfd4kx3W5ty7ySLGiKHqmPUUdpus

If you have difficulty with this - Ask Google "how to make a payment on a bitcoin wallet". It's easy.
After receiving the above amount, all your data will be immediately removed automatically.
My virus will also will be destroy itself from your operating system.

My Trojan have auto alert, after this email is looked, I will be know it!

You have 2 days (48 hours) for make a payment.
If this does not happen - all your contacts will get crazy shots with your dirty life!
And so that you do not obstruct me, your device will be locked (also after 48 hours)

Do not take this frivolously! This is the last warning!
Various security services or antiviruses won't help you for sure (I have already collected all your data).

Here are the recommendations of a professional:
Antiviruses do not help against modern malicious code. Just do not enter your passwords on unsafe sites!

I hope you will be prudent.
Bye.

附上郵件表頭:
Received: from customer-189-216-57-31.cablevision.net.mx (unknown [189.216.57.31])
by mail.xxx.com.tw (Postfix) with ESMTP id 318A26AE4059
for moska@xxx.com.tw; Mon, 29 Oct 2018 08:14:52 +0800 (CST)
Message-ID:
From: moska@xxx.com.tw
To: moska@xxx.com.tw
Subject: moska@xxx.com.tw is compromised. Password must be changed
Date: 28 Oct 2018 10:56:13 -0700
MIME-Version: 1.0
Content-Type: text/plain;
charset="ibm852"
Content-Transfer-Encoding: 8bit
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.0471
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.0471

SMTP記錄:
Oct 29 08:14:52 mail postfix/smtpd[3226]: disconnect from unknown[189.216.57.31]
Oct 29 08:14:52 mail postfix/smtpd[3226]: 318A26AE4059: client=unknown[189.216.57.31]
Oct 29 08:14:51 mail postfix/smtpd[3226]: connect from unknown[189.216.57.31]
Oct 29 08:14:51 mail postfix/smtpd[3226]: warning: hostname customer-189-216-57-31.cablevision.net.mx does not resolve to address 189.216.57.31: Name or service not known