Thank you for all the helpful information. Still need your help, I’ve got attacked by this virus when i downloaded a freeware. Now my files are encrypted with .koom extension.
To remove KOOM virus and restore encrypted files, do the following:
1. disconnect the computer from the network
2.download to the USB stick using another computer or phone several programs from the next list: https://www.myantispyware.com/2018/04/23/best-free-malware-removal-tools/
3 scan the infected computer, find and remove the virus.
4. Recover encrypted files, use the following instruction: https://www.myantispyware.com/2019/12/04/how-to-recover-encrypted-files-ransomware-file-recovery/
Use the following guide: https://www.myantispyware.com/2021/09/19/how-to-remove-koom-ransomware-decrypt-koom-files/