Attackers are deleting files on publicly accessible Lenovo Iomega NAS devices and leaving ransom notes behind. These ransom notes state that the attackers will give the files back if a bitcoin ransom is paid. The most common message is that the user must pay 0.01 to 0.05 bitcoins to the specified address or the files “will be gone for good”” A different variant that is less commonly seen warns that if the user does not make the payment
Source: security