Thanks for response!
First of all, permisson of folder […]/wp-content/wflogs_virus was 750. Changing rights of folder to 755 was no resolution, same warnings!
Permisson of files:
[…]/attack_data.php was 600
[…]/config.php was 000
after changing files permission to 700, Backup is “success”!
Because these files belong to wordfence firewall, do you know what will happen if I will fix 700 to these files?
