![]() ![]() The extension implies the ransomware might use AES-128 encryption but this has not been confirmed. In this way, a file named "invoice.pdf" will become "128ctr" once MegaCortex has encrypted it. Encrypted Files and ExtensionsĪt least one instance of a MegaCortex infection used the ".aes128ctr" extension to mark encrypted files, appending the extension after the original one. There is no specific ransom demand listed in the note, possibly to give the bad actors behind MegaCortex more flexibility to tailor the ransom sum depending on the type and size of enterprise that is being attacked. According to the ransom note, those are "encrypted session keys" that the criminals claim they need to decrypt the victim's files. The file itself contains records of each encrypted file, along with a string encoded in base64 and two separate 40-character hexadecimal strings. ![]() tsv file generated by MegaCortex has the same name as the malicious DLL mentioned above. ![]() You're the one who has to walk through it. If you want to purchase our software to restore your data contact us at: You will also receive a consultation on how to improve your companies cyber security. The softwares price will include a guarantee that your company will never be inconvenienced by us. ![]() To confirm that our software works email to us 2 files from random computers and C:\.tsv file('s)Ĭ:\.tsv contain encrypted session keys we need in order to be able to decrypt your files. ![]()
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