ClamAV with ClamTk
The ClamAV virus scanner, with ClamTk as a simple window for running scans.
Installs from Ubuntu's own software archive.
Looking for Malwarebytes on Linux? ClamAV with ClamTk does the same job for free, and TuxPick installs it for you.
Install ClamAV with ClamTk with TuxPickIt works on Ubuntu 22.04 and 24.04, and on systems built on them like Zorin OS and Pop!_OS.