Trojan:Win32/Wacatac.B!ml found in C:\$Extend\$Deleted\0099000000001E1607EF0CDC [migrated]

I am really worried right now. I got the following message from Defender (Windows 11):

What I tried so far:
Actions to remove or even quarantine don’t work.
Defender offline scan and Malwarebytes didn’t find anything but Defender full sca… Continue reading Trojan:Win32/Wacatac.B!ml found in C:\$Extend\$Deleted\0099000000001E1607EF0CDC [migrated]