Trojan.Zeroaccess!inf5 is a malware that uses advanced techniques to infect a target computer. It requires systematic removal procedure to get rid of this Trojan.

Trojan.Zeroaccess!inf5 are harmful files identified to be compromised by Trojan.Zeroaccess. Files with this infection are deemed malicious. It also endangers the privacy of computer users. Trojan.Zeroaccess!inf5 is part of a modular Trojan that carry out various payloads once run on the computer. In most cases, this Trojan is used to spread a copy of another malware without being detected by antivirus program.

Once Trojan.Zeroaccess!inf5 is run, it will instantly hook a code into valid system processes. This is called rootkit technique. Trojans can conceal its presence of the compromised computer by showing only legitimate process running on the system. Thus, malicious codes are kept under your antivirus radar. Then, Trojan.Zeroaccess!inf5 also drops a number of files and insert certain registry entries to make sure that it will load each time you start Windows.

Trojan.Zeroaccess!inf5 typically spread by means of another Trojan infection. It can also access the computer directly by taking advantage of weakness in Internet browser and security. Gaining an access through this hole gives Trojan.Zeroaccess!inf5 complete power to control the computer.

For this generic detection, infected computers may not provide common signs except for constant pop-up alerts shown by antivirus program. See the sample screenshot image below on the detection process carried out by known antivirus software.

Trojan.Zeroaccess!inf5 detection

How to Remove Trojan.Zeroaccess!inf5

Systematic procedures to get rid of the threat are presented on this section. Make sure to scan the computer with suggested tools and scanners.

Step 1 : Restart Windows in SafeMode with Networking

Starting Windows is Safe Mode only loads minimal sets of files and drivers. Most start-up malware and viruses don't run in this mode because Windows only loads basic components to initiate the system.

NOTE: You will need to PRINT or BOOKMARK this procedure, as we have to restart the computer during the removal process.

To start Windows in Safe Mode with Networking, please do the following:

1. Remove all media such as Memory Card, cd, dvd, and USB devices. Then, restart the computer.

Boot in Safe Mode on Windows XP, Windows Vista, and Windows 7 system
a) Before Windows begins to load, press F8 on your keyboard.
b) It will display the Advanced Boot Options menu. Select Safe Mode.

Start computer in Safe Mode using Windows 8 and Windows 10
a) Close any running programs on your computer.
b) Get ready to Start Windows. On your keyboard, Press and Hold Shift key and then, click on Restart button.
c) It will prompt you with options, please click on Troubleshoot icon.
d) Under Troubleshoot window, select Advanced Options.
e) On next window, click on Startup Settings icon.
f) Lastly, click on Restart button on subsequent window.
g) When Windows restarts, present startup options with numbers 1 - 9. Select "Enable Safe Mode with Networking" or number 5.

Startup Options

h) Windows will now boot on Safe Mode with Networking. Proceed with virus scan as the next step.

2. Once the computer boots into Safe Mode with Networking, please proceed with the steps below.

Step 2 : Scan the Computer with TDSSKiller to Remove Trojan.Zeroaccess!inf5

Anti-rootkit utility called TDSSKiller is a free tool from Kasperksy that neutralizes complicated malware which effectively hides its process, folders, files and registry entries.

1. Download TDSSKiller and save the file on your desktop or any accessible spot.

Download TDSSKiller

2. Extract the contents of downloaded file ( using archiver programs like Winzip or Winrar.
3. Locate the folder where you extracted and double-click the file TDSSKiller.exe to launch the scanner.
4. Once TDSSKiller is open, please mark Services and drivers as well as Boot Sectors. Picking these options ensures that the program will inspect boot sector and system files that are infected with Trojan.Zeroaccess!inf5. Please refer to attached image.


5. Click on Start Scan button to begin scanning your system. This may take a while. You need to complete this process to make sure that the program detects and delete all components of Trojan.Zeroaccess!inf5.
6. When scan has finished, you may restart Windows normally. This part of the removal process using TDSSKiller is now complete.

Step 3: Run Another Scan with ZeroAccess Fix Tool

This additional step will guarantee that no more components of Trojan.Zeroaccess!inf5 are present inside the computer. If in case the first scan fails to catch all threats, running ZeroAccess Fix Tool ensures that all remaining Trojans, viruses, and malware will be deleted.

1. Download the file FixZeroAccess.exe from the provided link. Save the file to accessible location like Windows desktop. This is a free tool created by Symantec to remove variants of Zeroaccess Trojan.

Download ZeroAccess Fix Tool

2. Close all open programs.
3. Browse for the location of the file FixZeroAccess.exe. Double-click on the file to run it. If it prompts for a security warning and ask if you want to run the file, please choose Run.
4. It will open a Zero Access Fix Tool End User License Agreement (EULA). You must accept this license agreement in order to proceed with Trojan.Zeroaccess!inf5 removal. Please click I Accept.
5. Finally, it displays a message and prepares the computer to restart. Please click on Proceed.

Zeroaccess Fix Tool

6. When it shows a message about 'Restarting System' please click on OK button.
7. After restarting the computer, the tool will display information about identified threats. Continue running the tool by following the prompts.
8. When it reaches the final step, the tool will show the scan result containing deleted components of Trojan.Zeroaccess!inf5. Your computer is now free from any harm.

Ways to Prevent Trojan.Zeroaccess!inf5 Infection

Here are some guidelines to help defend your computer from virus attack and malware activities. Being fully protected does not have to be expensive.

Install protection software to block Trojan.Zeroaccess!inf5 and other threats

Having an effective anti-malware program is the best way to guard your computer against malware and threats. Although full version of anti-malware will cost some penny to obtain, it is still worthy to buy one. With real-time scan, it will be safer for you to browse the web, download files, and do more things online.

Get Protection Software

Keep all programs up to date

It is important to download critical update for installed programs. Software updates includes patches for security flaw that may utilize by an attacker to enter the computer. This flaw may be taken advantage by Trojan.Zeroaccess!inf5, viruses, and malware to attack the computer. Crucial programs to watch for updates are MS Windows, MS Office, Adobe Flash, Adobe Acrobat, and Java Runtime.

Activate security features of your Internet browser

SmartScreen Filter, Phishing and Malware Protection, and Block Attack Sites are the respective security features of Internet Explorer, Google Chrome, and Mozilla Firefox. Although, it may not fully guard your computer from online attack, at least it can lessen the risk. Enabling these features also helps to secure your private data and avoid identity theft.

Be a responsible Internet user

Antivirus programs and security features of Internet browser facilitates real-time protection and monitors harmful activities online. However, it tends to malfunction for some reasons. Thus, you do not have to be fully dependent on these tools. It is always best to practice safety measures when using the Internet.

1 Response

  1. Michele says:

    TDSSKiller worked! Norton found virus Trojan.zeroaccess!inf5 a few weeks ago. Said it required manual removal. Directed me to Zero Access Removal Tool. Downloaded and opened. Needed restart. Did not work and since then internet not working in regular mode. Internet workes in Safe Mode With Networking. Tried Norton Power Eraser and Malwarebytes. No luck. Finally tried TDSSKiller. Downloaded in Safe Mode W/ Networking and opened. Zero Access found and “cured.”. I quarentined the other 4 files it found because I was not sure. Did a restart (started in regular not safe) and internet works again. Did a Norton scan and nothing found!

Leave a Reply

Your email address will not be published. Required fields are marked *