An unknown file appear on my server. The filename is test.php.LCK. I download and open in notepad, the contents are:
"my computer name" || "my email address"
I am very sure I did not put the file to the server and I am the only one who manage the server. Questions:
Q1: Is that a virus?
Q2: What can it harm to my server?
Q3: How to removed it from my server?(just shift+delete?) (I ran a full scan on the server using norton antivirus 2008, but nothing found)
Q4: How to protect my server from this file?