Exterminate It! Antimalware


Known threats:661,620 Last Update:November 20, 19:41


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File: system.dag

Location of system.dag and Associated Malware

Check whether system.dag is present in the following locations:

system.dag file locations that are Windows version independent:

  • C:\Windows\System32\system.dag

If you find system.dag file in any of these locations, your computer is very likely to be infected with the following malware:

IMPORTANT: Malware files can be camouflaged with the same file names as legitimate files. The system.dag file is associated with malware only if found in the locations listed above.


Different Variations of system.dag File^

File SizeFile Md5Last Seen
20CDD9A34B1FBF5EDC9FE305ED78CC43C5Dec 28, 2009
20DE21814120D27924B8C0962151698F3CMay 6, 2010
20CA327AA90C4C3686B801C8CAAEDABDF8May 17, 2010
209562F253C9BF79F0F9D6DF3AAE800D7EAug 30, 2010
202AAD4A14B38F7EFF444A9049F2AE8A8FDec 12, 2010
205548C8412D56C4A1C8249D22B90CB818Dec 22, 2010
20226528F77DE686DA69AEEA2F373823ABAug 6, 2011
2079825ACC3A0E667BC9D2655C5AA27A59Nov 22, 2011
20D8DEE8642AE2FA5B4879F6696E9FCAF3Apr 19, 2016

Why Is It Important to Remove Malware Files?^

It is imperative that you delete malware-associated files as soon as possible because they can be used - or are already being used - to inflict serious damage on your PC, including:

  • Disrupting the normal functioning of the operating system or rendering it completely useless.
  • Hijacking valuable private information (credit card numbers, passwords, PIN codes, etc.)
  • Directing all your Web searches to the same unwanted or malicious sites.
  • Dramatically slowing down your computer.
  • Gaining total control of your PC to spread viruses and trojans and send out spam.

How to Remove system.dag^

  1. To enable deleting the system.dag file, terminate the associated process in the Task Manager as follows:
    • Right-click in the Windows taskbar (a bar that appears along the bottom of the Windows screen) and select Task Manager on the menu.
    • In the Tasks Manager window, click the Processes tab.
    • On the Processes tab, select system.dag and click End Process.
  2. Using your file explorer, browse to the file using the paths listed in Location of system.dag and Associated Malware.
  3. Select the file and press SHIFT+Delete on the keyboard.
  4. Click Yes in the confirm deletion dialog box.
  5. Repeat steps 2-4 for each location listed in Location of system.dag and Associated Malware.
  6. Notes:

    • The deletion of system.dag will fail if it is locked; that is, it is in use by some application (Windows will display a corresponding message). For instructions on deleting locked files, see Deleting Locked Files.
    • The deletion of system.dag will fail if your Windows uses the NT File System (NTFS) and you have no write rights for the file. Request your system administrator to grant you write rights for the file.

Deleting Locked Files^

You can delete locked files with the RemoveOnReboot utility. You can install the RemoveOnReboot utility from here.

After you delete a locked file, you need to delete all the references to the file in Windows registry.

To delete a locked file:

  1. Right-click on the file and select Send To -> Remove on Next Reboot on the menu.
  2. Restart your computer.

The file will be deleted on restart.

Note: In the case of complex viruses that can replicate themselves, malware files can reappear in the same locations even after you have deleted those files and restarted your computer. Exterminate It! Antimalware can effectively eradicate such viruses from your computer.

To remove all registry references to a system.dag malware file:

  1. On the Windows Start menu, click Run.
  2. In the Open box, type regedit and click OK. The Registry Editor window opens.
  3. On the Edit menu, select Find.
  4. In the Find dialog box, type system.dag. The name of the first found registry value referencing system.dag is highlighted in the right pane of the Registry Editor window.
  5. Right-click the registry value name and select Delete on the menu.
  6. Click Yes in the Confirm Value Delete dialog box.
  7. To delete all other references to system.dag, repeat steps 4-6.
IMPORTANT: Malware files can masquerade as legitimate files by using the same file names. To avoid deleting a harmless file, ensure that the Value column for the registry value displays exactly one of the paths listed in Location of system.dag and Associated Malware.