How do you remove the apps: Mac Cleanup Pro, Booking and TechNetSearch? Dragging doesn't work.

P.S. There is another 4th set of malware files and a background program/process that also seems to have been installed maliciously and secretly on the same day and the same time as the above malware files: it is called "TechSignalSearch". This malware consists of several directory folders and program files, including one that installs itself to run in the background as what is known as a server "daemon". -- In particular, it sets itself up to allow malicious internet connections into and out of your Mac at boot up time and from time to time. I noticed it when I turned on my firewall and the firewall reported it to me.

To remove all the TechSignalSearch files, folders, and daemon processes, I used the anti-virus scanning software from MalWareBytes.com, an excellent product that you can use for free during a 14-day trial period. MalWareBytes will find all the stray files for TechSignalSearch (and other malware) and allow you to Quarantine the malware and/or permanently delete the malware. -- I highly recommend installing the free trial and then upgrading to the Premium version of MalWareBytes, which you can schedule to run hourly or daily on your Mac to check for malicious software.

One at a time. I am not certain of each of the three apps you mention other than MacClean but look at these threads.

How do I uninstall the Advanced Mac Clean… - Apple Community

Booking.com icon - Apple Community

get rid of search tech - Apple Community

The common ready seems to be to install Malwarebytes

See also Kappy's response here

removing Malware - Apple Community

These three malware apps appeared on my MacBook about the same time. It seemed to happen when I used the Chrome browser rather than my Safari or Firefox browser: i.e. I got all kinds of idiotic pop-up adds as soon as I used the Chrome browser and that's when these three malware items appeared on my machine.

To remove them, I had to reboot the computer and go directly to the Applications folder to find the .app files and then deleted them (moved them to Trash): "TechNetSearch.app," "Booking.app", and "Mac Cleanup Pro.app". There was also a "Player.dmg" disk image file with the exact same date and time that I had to delete from the Finder. Be sure to "Empty Trash" from the Finder/File menu after deleting the malicious apps and the dmg.

Apparently it was the Player.dmg disk image that was the source of the malware apps. Somehow the Google Chrome browser allowed some malicious ad ware to install the Player.dmg file that in turn installed the other malware apps, which in turn immediately went to work trying to lock up my Mac.