The file c100.php in your uimages folder is a malicious "security testing" script called C100. It's listed as malware as it is used to test the security of the server, although often hackers use it to intentionally brute-force their way into the server to gain access to other users files, which we have no tolerance for. That said it's a recent upload; I'm escalating this to staff so they can look and see if this was actually a result of being hacked or not.
My only addition to this for staff: The wiki on the account appears to upload images to the uimages folder; that's likely how C100 got there, HOWEVER, someone then ran the script as thats the only way my scanner sees it. It's up to you.