Threat Database Trojans Trojan.VidarStealer

Trojan.VidarStealer

By CagedTech in Trojans
Published:
Last updated:

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 2,255
First Seen: January 11, 2019
Last Seen: February 2, 2026
OS(es) Affected: Windows

The detection of Trojan.VidarStealer on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to compromise your computer's security and potentially steal sensitive information. It is essential to understand the nature of this threat and take prompt action to remove it and prevent future infections.

What Is Trojan.VidarStealer?

Trojan.VidarStealer is a type of malware that disguises itself as legitimate software to gain unauthorized access to your computer. Once installed, it can cause significant harm by stealing sensitive information, compromising your system's security, and potentially leading to financial loss or identity theft. The name suggests it may be related to information-stealing activities, but the exact capabilities can vary.

How Trojan.VidarStealer Operates

Trojan.VidarStealer, like other Trojans, operates by deceiving users into installing it on their systems. This can happen through various means, such as opening malicious email attachments, downloading infected software, or visiting compromised websites. Once installed, it can communicate with its command and control servers to receive instructions, which may include stealing login credentials, banking information, or other sensitive data. It may also install additional malware or create backdoors for remote access.

Symptoms of Infection

Identifying a Trojan.VidarStealer infection can be challenging due to its stealthy nature. However, some common symptoms may include unusual system behavior, such as slow performance, frequent crashes, or unexpected pop-ups. You might also notice unfamiliar programs or toolbars in your browser, or find that your browser's homepage has changed without your consent. In some cases, you might receive notifications from your security software indicating the detection of suspicious activity.

  • Unexplained changes in browser settings or the appearance of unfamiliar toolbars.
  • Pop-ups or advertisements that you cannot close.
  • System slowdowns or frequent crashes.
  • Discovery of unfamiliar programs or files on your computer.

How to Remove Trojan.VidarStealer

  1. Boot your computer in Safe Mode with Networking to prevent the malware from loading and to allow for internet access to download removal tools.
  2. Download and run a full scan with a reputable anti-malware tool, such as SpyHunter, to detect and remove all traces of the malware.
  3. Uninstall any suspicious programs or applications that you do not recognize or that were installed around the time the malware was detected.
  4. Reset your browsers (Chrome, Firefox, Edge) to their default settings to remove any malicious extensions or settings changes made by the malware.
  5. Reboot your computer and run another full scan with your anti-malware tool to ensure that all malware components have been removed.

Conclusion

Removing Trojan.VidarStealer requires careful and immediate action to prevent further damage. By following the steps outlined above and maintaining good security practices, such as regularly updating your operating system and security software, being cautious with email attachments and downloads, and using strong, unique passwords, you can help protect your computer and personal information from future threats. Remember, vigilance and proactive measures are key to securing your digital environment.

SpyHunter Detects & Remove Trojan.VidarStealer

File System Details

Trojan.VidarStealer may create the following file(s):
# File Name MD5 Detections
1. lsau4htu.exe ffba81208a6a7df96b2ac2bdfbc014a1 2

Registry Details

Trojan.VidarStealer may create the following registry entry or registry entries:
Regexp file mask
%APPDATA%\winupas.exe

Directories

Trojan.VidarStealer may create the following directory or directories:

%PROGRAMFILES%\Botbeetle
%PROGRAMFILES(x86)%\Botbeetle