This WastedLocker ransomware encrypts the data of companies, business users, the content of their websites and servers using AES-256 (CBC mode) + RSA-4096, and then demands a ransom in BTC to get the files back.
Phoenix CryptoLocker Ransomware force the insurance giant CNA to halt and disconnect its services. That is might be work of Evil Crop because of code similarities between there previous locker.
RegretLocker uses a special technique to mount the virtual disk file to individually encrypt each of its files. RegretLocker uses the Windows Virtual Storage API OpenVirtualDisk, AttachVirtualDisk, GetVirtualDiskPhysicalPath to mount virtual disks.
This is an Andorid Locker application that upon execute abuse android.permission.SYSTEM_ALERT_WINDOW and ask for a code to close the alert. It did not ask for ransom just an annoying alert box.
CovidLock is an Ransomware for Android Mobile devices. It harvest the fear of the current Corona Virus crisis. It demands a ransom of $250 in Bitcoins for decryption code/key.