Severity scale:  
  (40/100)

DyFuCa. How to remove? (Uninstall guide)

removal by Jake Doevan - - | Type: Spyware

DyFuCa – a dangerous malware that can install dubious applications and spy on users' activities

DyFuCa virus
DyFuCa is a spyware program that is capable of installing additional components without permission

DyFuCa is an adware program which consists of two components: a downloader and a browser helper object[1] (BHO). Both of these elements get installed without users' knowledge when they access certain websites and allow ActiveX controls to be run. The suspicious program is also capable of redirecting users to sponsored or even dangerous domains, display intrusive advertisements in Google Chrome, Internet Explorer or Mozilla Firefox and even send emails to everybody on the Address Book in the Outlook. Alternatively, the DyFuCa is also known as Internet Optimizer.

SUMMARY
Name DyFuCa
Alternative name Internet Optimizer
Type Adware/spyware
Symptoms Pop-up ads, redirects, questionable program installation and other unwanted activity
Distribution Malicious websites
Affected browsers Google Chrome, Internet Explorer and Mozilla Firefox
Detection and elimination Download and install Reimage

Whenever users are trying to access a broken URL or mistyped the page address, they are immediately redirected to advertisement-filled websites. These domains can be filled with pop-ups, banners, coupons, discounts, in-text links, auto-play videos and similar ads. It goes without saying that this activity dramatically diminishes web browsing activity, as even accidental clicks can lead sites of offensive content. Remove DyFuCa virus from your system, and you will not have to worry about these disturbances anymore.

The secondary component of the adware is the downloader. As soon as the hijack occurs, the malicious application tries to download zx-install.php. Among many others, rogue software such as scareware or even keyloggers[2] may be downloaded as well. Security experts[3] warn that these cyber threats can lead to money theft or identity fraud, so users should be aware of DyFuCa spyware dangers.

Additionally, DyFuCa creates various registry entries, including HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run, which allows it to run each time Windows is booted and perform even more malicious tasks. Malware infiltrates Outlook, and it sends out messages to everybody on the address book, urging users to visit sponsored websites or download and install the spyware. This activity is virus-like, as many trojan horses or other malware employs such tactics.

DyFuCa virus also creates the following files inside the Windows folder:

  • offun.exe
  • tcb.pmw
  • srveghcxhp.exe
  • ucffhpc.exe
  • srvbwfwngw.exe
Because this malicious spyware makes several modifications to registry entries, as well as installs additional components into the system, we do not recommend manual DyFuCa removal. Instead, you should download and install Reimage or Plumbytes Anti-MalwareMalwarebytes Malwarebytes for complete malware elimination.

Stay away from dubious websites and do not accept any questionable licence agreements

Although this program does not enter PC in illegal ways (such as phishing emails or via the exploit kits), it can get installed without users even understanding what has actually happened. Thus, we can't call this type of installation entirely legitimate, either.

When the user gets redirected to certain dubious pages, he or she is asked to enable ActiveX code from MoneyTree. As soon as the user agrees, a license agreement for Internet Optimizer shows up, prompting to accept it. Alternatively, users may be redirected to the web browser page, or to it could display nothing at all. As soon as the user consents to the agreement, Dyfuca is installed on the machine.

Therefore, we advise users to stay away from questionable websites and never agree to run ActiveX, JavaScript or any other script on their device. Instead, ignore the pop-ups and close down the browser.

Remove DyFuCa from your PC using AV engine

As we already mentioned, this spyware program can install plenty of other PUPs on the machine. Therefore, trying to remove DyFuCa virus manually would not succeed, and multiple components still might be left on the system. Furthermore, it could have installed a dangerous trojan or keylogger without your knowledge.

Therefore, we recommend automatic DyFuCa removal. All you have to do is download and install security software. Because the malicious application modifies Windows Registry, we suggest using Reimage, as it can correct keys and eliminate all traces of malware.

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What to do if failed?
If you failed to remove virus damage using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to remove virus damage. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Malwarebytes.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Combo Cleaner.

To remove DyFuCa, follow these steps:

Remove DyFuCa using Safe Mode with Networking

To uninstall DyFuCa virus from your device safely, enter Safe Mode with Networking:

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove DyFuCa

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete DyFuCa removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove DyFuCa using System Restore

You can eliminate they suspicious program by using System Restore:

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of DyFuCa. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that DyFuCa removal is performed successfully.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from DyFuCa and other ransomwares, use a reputable anti-spyware, such as Reimage, Malwarebytes MalwarebytesCombo Cleaner or Plumbytes Anti-MalwareMalwarebytes Malwarebytes

About the author

Jake Doevan
Jake Doevan - Computer technology expert

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References