A new MBR bootlocker called DiskWriter, or UselessDisk, has been discovered that overwrites the MBR of a victim's computer and then displays a ransom screen on reboot instead of booting into Windows. This ransom note asks for $300 in bitcoins in order to gain access to Windows again.
As more and more ransomware outbreaks are discovered, the line has become blurred in whether they are being utilized as a wiper or an actual ransomware. Such is the case with a new ransomware attack called ONI that has been used in targeted month long attacks against Japanese companies.
A new bootlocker ransomware called RedBoot will encrypt files on the computer, replace the MBR, or Master Boot Record, of the system drive and then appears to trash the partition table.
A new ransomware called Satana was discovered by Malwarebytes security researcher S!Ri that packs a 2 in one punch. When installed, the Santana Ransomware will encrypt your files using a standard file crypter and then also install a bootlocker to prevent you from logging into Windows.