Click on screenshot to zoom
Danger level 7
Type: Trojans
Common infection symptoms:
  • Connects to the internet without permission
  • Installs itself without permissions
  • Slow Computer
  • Slow internet connection
  • System crashes


DOS/Alureon.A is a Trojan from the Alureon family of Trojans. It targets the Master Boot Record. The main objective of DOS/Alureon.A is to decrypt and execute a file called "ldr16". The file itself can be found on a virtual file system that is created by Trojan:Win32/Alureon.DX.

DOS/Alureon.A helps other Trojans from the same group (especially Trojan:Win32/Alureon.DX) to steal data from the affected computer. They infect both 32-bit-based and 34-bit-based operating system. The difference is that on 32-bit-based operating systems the Trojans drop malicious dll files and infect drivers. Then Trojan:Win32/Alureon.DX copies a list of files to the previously mentioned virtual file system (the copied files include bckfg.tmp, cmd.dll, ldr16, ldr64 etc).

For 64-bit-based operating systems the malicious code and files are written into the encrypted virtual file system directly. This is where DOS/Alureon.A comes into the picture, because Trojan:Win32/Alureon.DX uses it as a tool to modify the Master Boot Record. You might also experience an unexpected system reboot, because the Trojans force computer to restart once the modification attempt has been made.

Also, since DOS/Alureon.A is part of the data-stealing Trojan family, you should not be surprised when your computer attempts (urged by Trojan:Win32/Alureon.DX) to contact remote servers at, or It just shows that DOS/Alureon.A and other are successful and infecting your system and sooner or later important financial data will be stolen.

Remove DOS/Alureon.A and other Trojans from Alureon group. Do not allow this infection to steal your data. If manual removal is too much of a task for you, download a computer security program and terminate DOS.Alureon.A automatically before you get to suffer terrible consequences.

Download Spyware Removal Tool to Remove* DOS/Alureon.A
  • Quick & tested solution for DOS/Alureon.A removal.
  • 100% Free Scan for Windows

How to manually remove DOS/Alureon.A

Files associated with DOS/Alureon.A infection:

Post comment — WE NEED YOUR OPINION!

Please enter security code:
This is a captcha-picture. It is used to prevent mass-access by robots.