Hello out there!

Does anybody known something about a bot or
something similar?

I've found a directory /tmp/,../ with the following content:
total 51
drwxr-xr-x 2 www-data www-data 1024 Jul 25 22:32 .
drwxrwxrwt 7 root root 5120 Jul 25 22:50 ..
-rw-r--r-- 1 www-data www-data 38166 Jul 16 21:43 error.php?tipo=404
-rw-r--r-- 1 www-data www-data 2319 May 17 03:03 go.php
-rw-r--r-- 1 www-data www-data 62 Jul 16 21:44 ok.txt
-rw-r--r-- 1 www-data www-data 44 Jun 19 04:42 teste.txt
-rw-r--r-- 1 www-data www-data 801 Jun 30 01:50 tiranosarro.html

This always can be found when the machine started to send masses
of emails.

Anybody there, who knows where it comes in?

TIA,
Sigmar