Your company's network has been breached and infected with MegaCortex Malware.
All of your user credentials have been changed and your files have been encrypted.
We ensure that the only way to retrieve your data swiftly and securely is with our software.
Restoration of your data requires a private key which only we possess.
To confirm that our decryption software works email to us 2 files from random computers.
You will receive further instructions after you send us the test files.
After receiving payment we will provide you with the decryptor including its full source code and credentials to your computers.
We have also downloaded your data to a secure location. In the unfortunate event of us not coming to an agreement we will have no choice but to make this data public.
Once the transaction is finalized all of copies of data we have downloaded will be erased.
We will provide any assistance if needed.
◆New Megacortex Ransomware Changes Windows Passwords, Threatens to Publish Data (Bleeping Computer, 2019/11/05)