Strange folders and files in the .tmp folder

Strange folders and files in the .tmp folder

I run two computers with Ubuntu 11.04 installed on one of them and Ubuntu
12.04 on another one. Both of them are connected to internet through one
wireless router. I found that an identical set of files and folders have
been plantet in .tmp folder on both of my computers despite the fact that
they have different versions of OS running on them. The names of files
sound very suspicious and they look like a spyware. Most of these files
cannot be deleted as they are locked for the comp owner. Some of them can
be removed, but replicate soon after that. I reformatted the hard drive of
one of the comps and installed Ubunt 12.04.02 LTS freshly downloaded from
the Ubunt site. I intentionally disconnected the comp from the internet
during installation to see if these files appear again in the .tmp folder.
And they did. Here the names of these files and folders:
/tmp/keyring-CTCn6F /tmp/orbit-thierry /tmp/pulse-2L9K88eMlGn7
/tmp/pulse-PKdhtXMmr18n /tmp/pulse-qagOC5AMyLRa /tmp/ssh-tJOQMucK1524
/tmp/virtual-thierry.ozVf7i /tmp/unity_support_test.0
Please, advise if they are legitimate for the Ubuntu, which is hard to
believe, and, if not, how to get rid of them,