The devs posted in the official forum this statement:
“A person has gained access to our main email account which have details listed for our FTP’s, etc. He then uploaded a malicious application to the US file host which has since been taken offline.
The file was called dayz_auto_updater.exe This malicious software is lead to be a backdoor / bot. Below is the ThreatExpert report on this file.
ThreatExpert also explains where this malicious application installs / moves its processes to stay hidden within your computer. So if you are a user who has downloaded the .exe called dayz_auto_updater.exe from the US Mirror is to scan their computer against viruses and read the description by ThreatExpert on where to locate this if your Virus detector does not pick it up.”
So if you downloaded dayz_auto_updater.exe take immediate action.
I just want to clarify that I have recommended in THIS post to download DayZ Updater and this is NOT in any way related with the dayz_auto_updater.exe that was uploaded in the official DayZ repository. DayZ Updater is safe as far as i know.