nginx Trojan (Welcome, 404 not found, 403 Forbidden)

By | July 11, 2012 | 0 Comment

Nginx is a free open source HTTP and proxy server. It may be also utilized as IMAP/POP3 proxy server. Nginx comes from a term EngineX was first released in 2004. To date, it is now used by almost 25 million web sites. In fact, nginx fuels high quality web sites including WordPress, CloudFlare, Netflix, Zynga, Pinterest, GitHub among others.

Nginx is not a virus, Trojan or some kind of malware. Although, hackers these days are fond of attacking web sites running on this server. If you will see a message about “Welcome to nginx”, “404 Not Found – nginx”, or “403 Forbidden – nginx/1.0.10″, it signifies that the site you are trying to visit is affected by a malware created specifically to hit nginx-based web sites.

When a Trojan attacks the web site, it modifies header information and adds a java script code to redirect user to another sites. When redirection error occurs, or if the script malfunctions, site will display “404 Not Found – nginx”. Refer to graphical image below.

Having those error messages does not guarantee that your computer is free from threats. There are reports that some users are experiencing this nginx errors at all times, not just for specific sites. Thus, you must run a scan using anti-virus and anti-malware program to eliminate the cause.

Type Trojan
Sub-Type Browser Hijacker
OS Affected Windows XP, Windows Vista, Windows 7

What are the Symptoms of nginx Trojan Infection?

Common symptoms for an infected server is a display of messages “Welcome to nginx”, “404 Not Found – nginx”, or “403 Forbidden – nginx/1.0.10” when the page loads.

Screenshot image of Welcome to nginx!

welcome to nginx

Screenshot image of 404 Not Found – nginx

404 not found nginx

Screenshot image of 403 Forbidden – nginx/1.0.10

403 forbidden nginx

Follow these Procedures to Remove nginx Trojan (Welcome, 404 not found, 403 Forbidden)

Procedure 1: Start Computer in Safe Mode

Restart your computer in Safe Mode with Networking

- After turning On the power of the computer, just before Windows start, press F8. This is a quick process, so you must press F8 button very timely. Failure to enter this mode will start Windows normally. In that case, you need to turn off the PC again and repeat the process.

- From the selections, choose Safe Mode with Networking. Please use keyboard's arrow up/down to navigate between selections and press Enter to proceed. Safe Mode boots slower than normal and your screen will be in low-resolution format. If it prompts you at boot-up, please proceed to Safe Mode. Loaded driver and processes are minimal so expect that other devices on the computer will not be available during this mode.

SafeMode Networking

Procedure 2: Scan and remove nginx Trojan (Welcome, 404 not found, 403 Forbidden) files with MalwareBytes Anti-Malware

To remove nginx Trojan (Welcome, 404 not found, 403 Forbidden), download Malwarebytes Anti-Malware by clicking on the button below. This tool is effective in getting rid of Trojans, viruses and malware.

Download nginx Trojan (Welcome, 404 not found, 403 Forbidden) Removal Tool

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. The tool will launch.
4. Thoroughly scan the computer and remove all threats detected by this anti-malware program.

Procedure 3: Run TrendMicro's Fake Antivirus Remover (ATTK) to check and delete any remnants of nginx Trojan (Welcome, 404 not found, 403 Forbidden).

As an added help to remove nginx Trojan (Welcome, 404 not found, 403 Forbidden), you can scan the computer with Fake Antivirus Removal Tool. This software is provided and distributed by TrendMicro. Follow this procedure to run a scan with this tool.

1. Download the package by clicking on the button below. This will launch a new browser window that contains further details about the tool.

FakeAVRemover Download Link

2. Save the file to a location on your hard drive.
3. Browse for the location of the file and double-click to run. If you are using Windows Vista or Windows 7, right-click on extracted file supportcustomizedpackage and click on Run as Administrator.

Run FakeAVRemover

4. When program launch, it will run a command prompt to initialize, prepare components, and update the program.
5. Next it will open the graphical user interface (GUI) of Anti-Threat Toolkit.

FakeAVRemover GUI

6. Click on Scan Now. This operation will scan all nginx Trojan (Welcome, 404 not found, 403 Forbidden) files and processes in your computer and display a list of result for possible Fake Antivirus program and malware that needs to be removed.

FakeAVRemover Scan

7. Tick all items that are detected by the program, and then click Clean. The tool will start removing nginx Trojan (Welcome, 404 not found, 403 Forbidden) components from the computer.
8. If it asked you to restart Windows, please do so.

Procedure 4: Remove Rootkit Trojan with Avast aswMBR

A Trojan often drops malware using an advance technology known as rootkit. It hides the installation of nginx Trojan (Welcome, 404 not found, 403 Forbidden) from your anti-virus program and injects malicious code to running Windows processes. To complete the clean-up process, you also need to scan and remove rootkit Trojan.

1. Download aswMBR from Avast server. Save it to your computer.

Avast Rootkit Scanner

2. Double-click on the file aswMBR.exe to run the program.
3. If it prompts you to download the latest Avast! virus definition, please click Yes. This is necessary to identify most recent version of the Trojan as well as hidden files of nginx Trojan (Welcome, 404 not found, 403 Forbidden).

Updating aswMBR

4. Click on Scan button to start checking your computer for presence of rootkit Trojan and other viruses. It will display a message "Scan finished successfully" when done.

aswMBR Scan

5. Click Fix or FixMBR to start removing infection. If aswMBR contains the latest Avast! virus definition file, it will automatically clean infected files on your PC.

Protect your PC from nginx Trojan (Welcome, 404 not found, 403 Forbidden) or Similar Attack

Turn On Security Features of your Internet Browser

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 files online. You may have avoided nginx Trojan (Welcome, 404 not found, 403 Forbidden) virus if this has been active on your PC. 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

Google Chrome's Enable Phishing and Malware Protection

With Google Chrome's Phishing and Malware Detection feature, you will have lesser risks browsing the web. It will display a warning when the site you are trying to visit is suspicious. To enable Phishing and Malware Protection, please do these steps:

1. Open Google Chrome.
2. Click on the Customize and control Google Chrome (3-Bars Icon) located on top right corner of the browser.
3. Select Settings from the drop-down list.
4. Once on the settings page, click on Show advanced settings... at the bottom of the page to see the rest of the Chrome setup.
5. Locate Privacy section and mark 'Enable phishing and malware protection'.

Chrome Security Settings

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

SEE MORE : Enable Phishing and Malware Protection on Google Chrome

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 on the computer. 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 Tools. 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

Remove nginx Trojan (Welcome, 404 not found, 403 Forbidden) & Protect Your Computer Now!

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