Malwarebytes fails to remove persistent adware redirects and the manual removal + blocklist patch that worked – WP Newsify

In the cybersecurity landscape, end users often rely on trusted tools to handle infections that threaten their systems and data. Malwarebytes, a popular antivirus and anti-malware solution, is often among the first lines of defense. However, in recent cases, users have reported that Malwarebytes has not completely removed certain adware infections, especially those involving browser redirects that prove persistent and elusive. Despite multiple scans, restart attempts, and even quarantines, the unwanted behavior continued to emerge.

TLDR

Some adware redirect infections persist even after using Malwarebytes, which is generally considered a reliable malware detection tool. These infections often hide in overlooked file paths or manipulate browser settings in ways that standard scanners miss. A combination of manual file and registry deletion, along with a custom host and blocklist patch, proved effective in eliminating the redirects. Extra attention to browser settings and startup processes was essential in the complete cleanup.

What Malwarebytes could do – and what it missed

After noticing suspicious behavior such as automatically opening browser windows and redirecting searches to unknown search engines or promotional pages, many users turned to Malwarebytes. The application would detect and quarantine various threats including PUPs (Potentially Unwanted Programs) such as:

• SearchSmart
• SafeBrowse
• SmartWeb

However, the stories shared on community forums revealed a disturbing pattern: after a system restart or even multiple clean scans, the adware symptoms returned. In particular, browser redirects to fake search engines (e.g. searchglobe.xyz, webnavigator.coAnd mysearchcentral.com) persisted despite clean Malwarebytes reports.

It became clear that while Malwarebytes could detect and remove superficial components, it struggled to completely eradicate this particular class of persistent redirect malware. In several cases, browser extensions were reinstalled without user consent, indicating a deeper infection or reinstallation pipeline.

Analysis of the infection vector

Upon further inspection of the affected systems, a manual analysis revealed the following methods used by the malware:

1. Scheduled tasks: The adware had tasks set up in Windows Task Scheduler to launch a dummy update.exe file in the appdata folder every time the user logged in.
2. Registry Operations: Suspicious entries have been found under
   HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

   referring to background services hidden in deeply hidden folders such as:

   C:\Users\[Username]\AppData\Roaming\Updater\update.exe

3. Browser hijacking: Even when users reset their browser settings, the redirect domains would reappear. A JavaScript-based extension dynamically injected redirect code into pages.
   This extension disguised itself with generic names such as “Tab Helper” or “Video Downloader HD.”

Notably, Malwarebytes failed to remove or even detect the registry entries and scheduled tasks in multiple test scenarios reproduced in a virtual machine environment.

Manual removal steps that worked

Solving the problem required a combination of steps. Here is the complete process that finally resolved the persistent redirect problem:

1. Disable startup tasks and check Task Scheduler

To use Autoruns for Windows from Sysinternals and the native Windows Task Scheduler, the user identified and deleted hidden startup items and scheduled tasks related to suspicious executables. If their execution point was unclear, the associated .exe files were traced to their parent folders and manually deleted after disabling their process in Task Manager.

2. Delete registry entries

Dead registry entries that were set by the malware to automatically execute files on system startup were removed. Critical paths to check include:

• HKCU\Software\Microsoft\Windows\CurrentVersion\Run
• HKLM\Software\Microsoft\Windows\CurrentVersion\Run
• HKCU\Software\Policies\Google\Chrome\ExtensionInstallForcelist (for Chrome-based redirect behavior)

3. Delete extension folders manually

Because malicious browser extensions can be reinstalled after a browser reset if their payload remains in the user data path, the following folders have been cleared:

• C:\Users\[Username]\AppData\Local\Google\Chrome\User Data\Default\Extensions
• Same for Firefox: ...\Profiles\xxxxx.default-release\extensions

This step ensured that even hidden or obfuscated plugins were removed from future browser sessions.

4. Clear DNS and reset network settings

Redirect malware can also change network configurations or the local DNS cache. A series of terminal commands were executed:

ipconfig /flushdns
netsh winsock reset
netsh int ip reset

These commands reset the TCP/IP stack and any DNS poisoning that may result from bad cache values ​​pointing to malicious hosts.

5. Patch the “Hosts” file with blocklist entries

The final and perhaps most effective step was to modify the Windows “hosts” file to include known adware domains and manually route them to 0.0.0.0. This resulted in an immediate halt to diversion efforts. Examples of additions to the block list include:

0.0.0.0 searchglobe.xyz
0.0.0.0 mysearchcentral.com
0.0.0.0 webnavigator.co
0.0.0.0 gosearches.gg
0.0.0.0 browserdefense.com

This solution is not foolproof, but serves as a powerful preventative filter until deeper security patches or updated definitions are released by anti-malware vendors.

Why Malwarebytes may be missing these threats

Malwarebytes prides itself on its behavior-based detection, but its persistent redirect adware has evolved:

• It mimics the behavior of legitimate updates or plugins and avoids signature detection
• It waits until after startup to cause infections, sometimes hours later, bypassing real-time scanning
• It uses multiple redundant infection vectors (e.g. registry + scheduled task + extension), making the cleanup only partially successful if performed incompletely

Additionally, some of these threats are classified as low risk by default, which results in them being tagged as ‘non-malicious’ promotions – a dangerous classification that keeps them out of quarantine rooms in standard scanning modes.

Recommendations for users facing similar problems

If you are dealing with redirect infections that seem to ‘survive’ a Malwarebytes scan, consider the following:

1. Use a multi-tool approach. Malwarebytes alone may not catch the entire infection.
2. Inspect and clean all startup entries, Task Scheduler and registry paths.
3. Remove browser extensions and clear related folders manually.
4. Patch DNS and “hosts” files with known bad domains to block reinfection attempts.
5. Consider using network-level filters such as Pi hole or DNS-based content blockers.

Closing thoughts

Malwarebytes remains an important tool in the anti-malware toolkit, but it is not infallible. As threats adapt and become more difficult to detect, especially those that operate in the gray space between advertising and malicious behavior, users sometimes need to go beyond automatic scanning. A careful manual cleanup – combined with strategic DNS and host file filtering – may be necessary to fully regain browser integrity and system performance.

Stay vigilant, check the deeper layers of your system and don’t rely entirely on automation. Sometimes the best defense is a sharp eye and a good blocking list.

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