Remove TrojanDownloader:Win32/Vundo.J

Threat Summary

Threat: TrojanDownloader:Win32/Vundo.J
Type: Trojan Downloader
Brief Description: This Trojan can download and execute more threats onto the infected computer.
Alias: TR/HiolesH.A.2, Win32/Citirevo.AC, Backdoor.Win32.Cidox.azd
Removal Tool: ▼ DOWNLOAD MalwareFox


TrojanDownloader:Win32/Vundo.J is a Trojan that sneaks into computer via spam email messages, which contain text about recent events and occasions. Other victims used to download this virus when they are tricked by misleading web sites. TrojanDownloader:Win32/Vundo.J is far more harmful than ordinary Trojan. It can perform deadly actions not seen on any other variants. Having this threat in computer for quite long will result to great damage or worst total crash of Windows system.
As mentioned, TrojanDownloader:Win32/Vundo.J is very harmful Trojan. It can perform payload at no given time. The moment this infection injects on the Windows system, it is now the great way to put more mess in the PC. This threat may download and install additional malware, spyware, and other similar infections.

To delete TrojanDownloader:Win32/Vundo.J is somehow difficult though it is not impossible. It makes it hard to detect and to locate by just browsing folders. Some files of the Trojan are well hidden into the system and Trojan author used to inject codes to some processes in order to load it each time Windows starts. In addition, vital and private information can be stolen and worst it can be deleted without you knowing.

TrojanDownloader:Win32/Vundo.J also disables security software and restricts access to security related web sites. Due to this function, this Trojan can do fully its task to spread the virus widely and even replicate itself to infect as many computers as can be. To remove TrojanDownloader:Win32/Vundo.J at once is simply the way to ensure that system will not be at high risk.

What are the Symptoms of Trojan:JS/Seedabutor.B’s infection?


Constant pop-up alerts from antivirus program indicates the presence of TrojanDownloader:Win32/Vundo.J. See image above for reference. Additionally, user may see presence of files like (random).exe and Txt.exe. Sample files are A0076124.exe and Od12.exe.

Procedures to Remove TrojanDownloader:Win32/Vundo.J

Removal steps on this page will help you get rid of the threat effectively using tools and virus scanners. Please make sure that you will carry out the guide in exact order.

Procedure 1: Scan Computer in Safe Mode Using Installed Anti-virus Program

1. When troubleshooting a PC, one common step is to boot operating system into Safe Mode with Networking. The same approach will be used in the removal of TrojanDownloader:Win32/Vundo.J. Please execute instructions based on your Windows OS version.

Start Windows 8 / Windows 10 in Safe Mode with Networking

- Close all running programs on your computer because we will need to restart Windows on this procedure.
- Press and Hold Shift key on your keyboard while clicking on Restart.
- You will then be presented with Troubleshooting Options.
- Click on Troubleshoot icon.
- Then, Click on Advanced Options icon.
- Select Startup Settings icon and then, Click on Restart button.
- When Windows restarts, it will prompt to choose number from the list of options. Press the number on your keyboard that corresponds to Safe Mode with Networking, commonly number 5.
- Once in Safe Mode, please proceed to the next step which is running a virus scan on the computer.

Start in Safe Mode with Networking (Windows XP / Vista / 7 Instruction)

- Please restart the computer and just before Windows start, press F8 on your keyboard repeatedly. You will be presented with Advanced Options Menu.
- From the selections, choose Safe Mode with Networking. Please use keyboard's arrow up/down to navigate between selections and press Enter to proceed.


2. Once your Windows is running in Safe Mode, open your installed anti-virus programs and update it to the most recent version by automatically downloading necessary updates.

3. Thoroughly scan the computer and remove all identified threats. Do not restart or turn off the computer after the scan process. You still need to run another scan. Please follow the next procedure.

Procedure 2: Scan and remove TrojanDownloader:Win32/Vundo.J files with MalwareBytes Anti-Malware

To remove TrojanDownloader:Win32/Vundo.J, download Malwarebytes Anti-Malware. This tool is effective in getting rid of Trojans, viruses and malware.

Download MalwareFox

1. After downloading, please install the program using the default settings.

2. At the end of the installation, please make sure that it will download necessary updates.

3. Once update has completed, MalwareFox will launch.

MalwareFox Scanner

4. Select SCAN button of MalwareFox application.

5. Scanning process will start and infections list will be displayed. Click NEXT to remove them.

MalwareFox Detection Result

Procedure 3: Run extra scan with Junkware Removal Tool

To make sure that no more malicious files linked to TrojanDownloader:Win32/Vundo.J are inside the computer, we must run another effective scanner. This time, use Junkware Removal Tool. No installation is necessary with this tool.

Download JRT

1. Click the button above to start the download process. Save the file to your preferred location.

2. Junkware Removal Tool will close all running applications later. So, before executing the file, please Bookmark or Print this page. And then, close all programs.

3. Double-click the JRT.exe file to initiate the tool.

4. It will prompt you to "Press any key to continue."

JRT Scanner

5. Junkware Removal Tool will create a Restore Point and proceed with the scan. Please wait for the scan process to finish.

6. After scanning the computer, JRT will open a Notepad containing scan logs. It may have not find TrojanDownloader:Win32/Vundo.J relevant entities, but it will surely delete any malicious items not found in the previous scans.

Procedure 4: Reset Affected Internet Browser

Reset browser settings of Google Chrome:

1. Open Google Chrome browser.

2. In the address bar, type this: chrome://settings/ and then, press Enter.

3. Navigate at the end of the page and click on Show advanced settings.

4. At the bottom of the page, click on Reset settings to remove all changes made by TrojanDownloader:Win32/Vundo.J.

Reset Google Chrome

Reset Internet Explorer Settings:

1. Open Internet Explorer software.

2. Navigate to top menu and click Tools > Internet Options.

3. On Internet Options window, select Advanced tab.

4. In order to reverse modifications caused by TrojanDownloader:Win32/Vundo.J, click on Reset button to bring back Internet Explorer's settings to their default condition.

Internet Explorer

Reset Firefox to its default state:

1. Open Mozilla Firefox program.

2. Navigate to top menu and Open Help Menu. Then, select on Troubleshooting Information.

3. Click on Refresh Firefox button to erase the effect of TrojanDownloader:Win32/Vundo.J.

Reset Firefox

Protect your PC from TrojanDownloader:Win32/Vundo.J or Similar Attack

Turn On Safe Browsing Features

Google Chrome's Protection from Dangerous Sites

With Google Chrome's Dangerous Site Protection feature, you will have lesser risks browsing the web. It will display a warning when the site you are trying to visit is suspicious, thus, you can prevent TrojanDownloader:Win32/Vundo.J infection. To enable protection from dangerous sites, please do these steps:

1. Open Google Chrome.

2. In the address bar, type this: chrome://settings/ and then, Press Enter.

3. Once on the settings page, click on Show advanced settings... at the bottom of the page to see the rest of the Chrome setup.

4. Locate Privacy section and mark 'Protect you and your device from dangerous sites'.

Chrome Security Settings

5. Please restart Google Chrome. New settings keep your browser safe while surfing the web.

SEE MORE : Enable Google Chrome's protection from dangerous sites

Internet Explorer - Activate SmartScreen Filter

Internet Explorer versions 8 and 9 has this feature called SmartScreen Filter. It helps detect phishing web sites and protect you from downloading malicious programs including TrojanDownloader:Win32/Vundo.J. To turn on SmartScreen Filter, follow these steps:

1. Please open Internet Explorer.

2. On top menu, select Tools (IE 9). For IE 8, please look for Safety menu.

3. Select SmartScreen Filter from the drop-down list and click on Turn on SmartScreen Filter.

IE SmartScreen Filter

4. Please restart Internet Explorer.

SEE MORE : Comprehensive steps to activate SmartScreen Filter

Mozilla Firefox - Block Attack Sites and Web Forgeries

Phishing and Malware Protection is a built-in feature on Firefox version 3 or later. It warns you when a page you are trying to visit contains phishing content or an attack site designed to drop threats such as TrojanDownloader:Win32/Vundo.J. To help you keep safe while browsing the Internet using Firefox, please follow this guide:

1. Open Mozilla Firefox browser.

2. On top menu, click on Open Menu. Then select Options from the list.

3. Select Security and put a check mark on the following items:

  • Warn me when sites try to install add-ons
  • Block reported attack sites
  • Block reported web forgeries

Firefox Security Settings

Edge Browser - SmartScreen Filter

SmartScreen filter is a built-in feature in Microsoft Edge browser that can help you deter malicious programs such as TrojanDownloader:Win32/Vundo.J. It can block malicious web sites and downloads.

1. Open Microsoft Edge browser.

2. Click on More Actions button located at top right corner of the screen.

3. Select Settings from the drop-down list.

4. Under Settings menu, go to Advanced Settings section and click on View Advanced Settings.

5. Scroll down to "help protect my PC from malicious sites and downloads with SmartScreen Filter". Turn it to ON.

6.You may now restart Microsoft Edge browser.

Edge SmartScreen Filter

Click Here to Leave a Comment Below 0 comments

Leave a Reply: