Exterminate It! Antimalware


Known threats:699,742 Last Update:November 20, 22:46


Running an update right before activating seemed to do the trick. Many thanks. (Also, once I had it properly activated, Exterminate It! got rid of the SpySnipe trojan I’d been battling with for a week, so the news is even better!)

Gary M.

File: ((Mutex)).dat

Location of ((Mutex)).dat and Associated Malware

Check whether ((Mutex)).dat is present in the following locations:

Windows 2000, Windows XP, Windows Server 2003 specific ((Mutex)).dat file locations:

  • C:\Documents And Settings\USER_NAME\Application Data\Microsoft\Windows\((Mutex)).dat

Windows Vista, Windows Server 2008, Windows 7, Windows 8 specific ((Mutex)).dat file locations:

  • C:\Users\USER_NAME\AppData\Roaming\Microsoft\Windows\((Mutex)).dat

If you find ((Mutex)).dat 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 ((Mutex)).dat file is associated with malware only if found in the locations listed above.


Different Variations of ((Mutex)).dat File^

File SizeFile Md5Last Seen
56085CC0FB890273FEA0422C61D497D8D642Dec 22, 2012
5324745E25D7E245F9AC9A3977EBB27D281C6DDec 29, 2012
8358867214B3E8979CFB83F8F4DBC0F99137DFeb 9, 2013
43996FBFE79FB9A7FC5715CD7B2775C90A58CMar 15, 2013
141844F14C91AD5A0E57ADC94E704C5CD9CC2Mar 18, 2013
50596DBF86F71CCE7940A939F31EA7D106BA7Apr 4, 2013
3069640FF09F5FD77C05ACE442D80DF1E7278AAApr 19, 2013
7648C8838DE4459733D5D159EB9604059A8EApr 23, 2013
9530716DF25F6EC70F13FF77048B9957AAAEMay 31, 2013
36496646DD0445E04F4D8E287A5C21B0A2940A92Jun 3, 2013
44616500E341238E6338FC1C0BEFB7EC208Jun 5, 2013
1438461659531358FE933980A9DA93EE33F03Jun 28, 2013
1045822686D2AC7A4771F045E41B44E4ED2661BJan 14, 2014
2580D0A7AF65394847B591E6269C71110F80Jul 9, 2014
47957927014040296735B660FF8C7ECF853FE7048Aug 3, 2014
3141725F79382600C07B86090B97850DECBA9CAug 29, 2014
104849B40C911899FB2B6291C3792D0C2C425Sep 7, 2014
284CAD01FDB44AE58DBE6C3973DCD87F5Mar 24, 2015
84219495C6C9C00F103E8A00C6038B7E578782Dec 18, 2015
29708EA570AEBFAFB6E75004F36213A726099Feb 16, 2016
4470A7ED5F80CF88178C66CCCD29AC7DB33AMar 9, 2016
4786BAE7AEA12B41FE7E28FCF94D0B2537E4Mar 22, 2016
15628035D728537356239FD92D830FE50F2095Jun 9, 2016
130978E6973AB83DCE7DC823E6A13BB81BD9D5Aug 13, 2016
11086E99C6E4A268272F746386E809789E34Sep 14, 2016
13003720CCB168EACE355DED46B51B69C997ABAOct 31, 2016
76296C07CBE71BC9FDBF390D56112313C9CNov 21, 2016
189183B093B51E881C3EBDA674142B12D5047Jan 31, 2017
37846392FF638D6132605BC460369B04F5B1Mar 28, 2017

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 ((Mutex)).dat^

  1. To enable deleting the ((Mutex)).dat 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 ((Mutex)).dat and click End Process.
  2. Using your file explorer, browse to the file using the paths listed in Location of ((Mutex)).dat 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 ((Mutex)).dat and Associated Malware.
  6. Notes:

    • The deletion of ((Mutex)).dat 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 ((Mutex)).dat 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 ((Mutex)).dat 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 ((Mutex)).dat. The name of the first found registry value referencing ((Mutex)).dat 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 ((Mutex)).dat, 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 ((Mutex)).dat and Associated Malware.