How to uninatall ZLoader malware from the operating system?

Also Known As: DELoader/Terdot virus
Type: Trojan
Distribution: Moderate
Damage level: Severe

ZLoader virus removal guide

What is ZLoader?

ZLoader (also known as DELoader and Terdot) is a malicious program which is being distributed through a malicious web pages that display a fake error notification (e.g., "The 'Roboto Condensed' font was not found"). Research shows that ZLoader is designed to infect systems with another malicious program, a banking Trojan called Zeus. We strongly recommend not to open file (or files) downloaded from pages that display that particular (or similar) error message.

ZLoader malware

When that malicious website is visited, it displays an error message saying that a website cannot be loaded properly because a font named "Roboto Condensed" was not found. It encourages visitors to fix this error by downloading and installing that font through "Mozilla Font Pack" or "Chrome Font Pack". It depends on what browser is used to open that malicious page. Depending on a browser that page downloads either "" or "" which contains "Chrome_Font.js" or "Mozilla_Font.js" JavaScript file that is designed to download and install ZLoader (aka DELoader and Terdot). As we mentioned in the introduction, this malware is used to distribute Zeus. Zeus is a banking Trojan that is capable of recording keystrokes and stealing online banking credentials like logins, passwords. Typically, cyber criminals misuse this information (credentials) to steal banking accounts and make fraudulent transactions, purchases, and so on. Either way, victims experience financial loss. Unfortunately, websites that display "The 'Roboto Condensed' font was not found" error could be used to proliferate other malicious programs like Nymaim, Ursnif as well. Typically, websites that display fake virus, error and other warnings get opened through other untrustworthy websites, deceptive ads or by potentially unwanted apps (PUAs) that are installed on user's browser and/or operating system. If there is a reason to think that a computer is infected with ZLoader or any other malware, then it should be eliminated as soon as possible.

Threat Summary:
Name DELoader/Terdot virus
Threat Type Trojan, password-stealing virus, banking malware, spyware.
Detection Names Avast (Win32:Malware-gen), BitDefender (Trojan.GenericKD.5954394), ESET-NOD32 (Win32/TrojanDownloader.Agent.DGM), Kaspersky (Trojan.Win32.Sennoma.anq), Full List (VirusTotal)
Payload Zeus banking Trojan.
Symptoms Trojans are designed to stealthily infiltrate the victim's computer and remain silent, and thus no particular symptoms are clearly visible on an infected machine.
Distribution methods Malicious websites, infected email attachments, malicious online advertisements, social engineering, software 'cracks'.
Damage Stolen passwords and banking information, identity theft, the victim's computer added to a botnet.

To eliminate DELoader/Terdot virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

More examples of malicious programs that are designed to steal sensitive information (including banking credentials) are Mispadu, Bolik and Casbaneiro. Typically, they are distributed by disguising them as some legitimate programs or files. When installed, they usually cause victims serious problems like installations of other malware, financial and data loss, problems with browsing safety, online privacy, and so on.

How did ZLoader infiltrate my computer?

As we mentioned in the introduction, cyber criminals spread ZLoader through a malicious page that is designed to trick people downloading and opening a file (font) which supposed to allow them to browse that page further. It is quite common for cyber criminals to spread malware through untrustworthy pages, third party downloaders, free file hosting pages, Peet-to-Peer networks (e.g., torrent client, eMule) and other questionable file or software download channels, tools. They often distribute malicious programs through spam campaigns, Trojans, fake software updaters and software 'cracking' (activation) tools as well. When they use spam campaigns, they send emails that contain malicious attachments (or website links that download malicious files). In most cases they attach executable files (like .exe), PDF documents, archive files like ZIP, RAR, Microsoft Office document, or JavaScript files. If recipients open those attachments, then cause installation of some malicious program. Trojans are malicious programs that are often designed cause chain infections. Once installed, they install other (additional) malware. Fake software updating tools usually infect systems by installing malware instead of updates, fixes, or by exploiting flaws, bugs of installed software that is out of date. Software 'cracking' tools supposed to bypass activation of paid, licensed software. However, quite often those tools are designed by cyber criminals who seek to infect computers with malware. Simply said, by using those tools poeple risk to install malicious software on their operating system.

How to avoid installation of malware?

Software (and files) should not be downloaded through third party downloaders, Peer-to-Peer networks or any other tools that we mentioned above. It should be done by using only official, trustworthy websites and direct download links. Attachments (or web links) in irrelevant emails that are received from unknown, suspicious addresses should not be opened. It is important to keep installed software up do date, however, it should be done properly: by using tools that are provided by official software developers and not some third party updaters. The same applies to activation of licensed software, besides, it is not legal to use 'cracking' to activate any software. One more way to keep operating systems safe is to regularly scan them for threats with a reputable antivirus or anti-spyware software. If you believe that your computer is already infected, we recommend running a scan with Spyhunter for Windows to automatically eliminate infiltrated malware.

Screenshot of a pop-up on the "The 'Roboto Condensed' font was not found" scam page (Mozilla Firefox):

zloader malware scam page encouraging to download a font on mozilla

Screenshot of a second pop-up on this page:

zloader malware scam page encouraging to download a font on mozilla second page

Screenshot of the first pop-up on the same scam page (Google Chrome):

zloader malware malicious page offers to download a font that installs ZLoader

Screenshot of the second pop-up on this scam page:

 zloader malware malicious page offers to download a font that installs ZLoader

Instant automatic removal of DELoader/Terdot virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of DELoader/Terdot virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

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How to remove malware manually?

Manual malware removal is a complicated task - usually it is best to allow antivirus or anti-malware programs to do this automatically. To remove this malware we recommend using Spyhunter for Windows. If you wish to remove malware manually, the first step is to identify the name of the malware that you are trying to remove. Here is an example of a suspicious program running on a user's computer:

malicious process running on user's computer sample

If you checked the list of programs running on your computer, for example, using task manager, and identified a program that looks suspicious, you should continue with these steps:

manual malware removal step 1Download a program called Autoruns. This program shows auto-start applications, Registry, and file system locations:

screenshot of autoruns application

manual malware removal step 2Restart your computer into Safe Mode:

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":


manual malware removal step 3Extract the downloaded archive and run the Autoruns.exe file.

extract and run autoruns.exe

manual malware removal step 4In the Autoruns application, click "Options" at the top and uncheck "Hide Empty Locations" and "Hide Windows Entries" options. After this procedure, click the "Refresh" icon.

Click 'Options' at the top and uncheck 'Hide Empty Locations' and 'Hide Windows Entries' options

manual malware removal step 5Check the list provided by the Autoruns application and locate the malware file that you want to eliminate.

You should write down its full path and name. Note that some malware hides process names under legitimate Windows process names. At this stage, it is very important to avoid removing system files. After you locate the suspicious program you wish to remove, right click your mouse over its name and choose "Delete".

locate the malware file you want to remove

After removing the malware through the Autoruns application (this ensures that the malware will not run automatically on the next system startup), you should search for the malware name on your computer. Be sure to enable hidden files and folders before proceeding. If you find the filename of the malware, be sure to remove it.

searching for malware file on your computer

Reboot your computer in normal mode. Following these steps should remove any malware from your computer. Note that manual threat removal requires advanced computer skills. If you do not have these skills, leave malware removal to antivirus and anti-malware programs. These steps might not work with advanced malware infections. As always it is best to prevent infection than try to remove malware later. To keep your computer safe, install the latest operating system updates and use antivirus software.

To be sure your computer is free of malware infections, we recommend scanning it with Spyhunter for Windows.

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Removal Instructions in other languages
Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
DELoader/Terdot virus QR code
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Platform: Windows

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