The following system changes may indicate the presence of this malware:
The presence of the following file: %Systemroot%\system32\nusb3mon.exe
The presence of the following registry modification:
In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run Sets value: "AhnLab V3Lite Update Process" With data: "%Systemroot%\system32\nusb3mon.exe"
If you have a Battle.net account, it might not be working properly.
TrojanDownloader:Win32/Navattle.A downloads and runs other files. It deletes a registry entry related to the gaming service Battle.net.
What to do now
To detect and remove this threat and other malicious software that may be installed on your computer, run a full-system scan with an appropriate, up-to-date, security solution. The following Microsoft products detect and remove this threat: