Virus damaging usb memory sticks

Hi. Welcome to the Apple Discussions!

There are several AV programs for Mac. One is the OpenSource ClamXAV. It's rather slow, but it is free. The other 2 AV programs for Mac that are Intego VirusBarrier X5 and Norton AntiVirus 11 for Macintosh. They are both subscription based programs.

I use ClamXAV personally, only because I don't want to pass on viruses to my Window's friends.

I must assume you are running Microsoft Windows on your Mac as Macs cannot get PC viruses. But it is a good idea to have virus protection so you don't pass on any PC viruses to others and to detect OSX malware.

Are you getting an error message when trying to delete it out of the trash?

Did you try doing a Secure Empty Trash from the Finder menu?

Or hold Option and empty trash.

Welcome to Apple Discussions:
The "virus" in your Trash with the strange file name is sometimes referred to as a Windows Ghost and if so, you cannot delete it because it really is not there.
If it is not a Windows Ghost, you can delete it using the terminal

First enter
ls -al .Trash
and see if you see the errant file(s)
If so, then enter
cd .Trash
and then
ls -al
and you should see the same files, but now you are "in" the .Trash
if you see the files, then enter
rm -i *
and you will be asked for confirmation for each file before it is deleted. This is a security measure.
you may need to enter
sudo rm -i *
and then enter your password.

If this does not work, then the files are these sticky Windows ghost files and other means must be employed.
Are you running XP or Vista via BootCamp or Parallels etc.?

Are you using Windows on your Mac? Otherwise, I don't see how it could be transferring from your mac to your usb stick unless you are manually copying it over to the usb stick.

That should work, but I have never heard or seen an inability to delete. I have used Unix systems for some time and you can always delete files if you have the proper privileges. If the secure delete and the delete from the CLI does not work, try doing the secure delete while the usb stick is in your mac. It has worked for me at least twice.