I have a website that uses Invision Power Board 3.3.4 to run it. Recently it keeps getting hacked, or it seems to be. I use one of the best hosting companies (I believe I do) I have a windows dedicated server, and EVERY time we restore a backup the same issue (same two files) keep getting corrupted. We run multiple virus scans and everything seems fine. Then hours later BAM same thing! I have changed the passwords on the FTP accounts, there has been NO unauthorized access to my server, and I am at a loss.
It is the index.php file and the builder.php file.
It has happened 6 times this weekend. I need it to stop and I am at a loss on it!