Threat Database Trojans Trojan.Vidar.FC

Trojan.Vidar.FC

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 2
First Seen: November 3, 2025
Last Seen: December 1, 2025
OS(es) Affected: Windows

The detection of Trojan.Vidar.FC on your system indicates a potential security threat that requires immediate attention. Trojans are a type of malware designed to allow unauthorized access to a computer system, and Trojan.Vidar.FC is no exception. In this removal report, we will provide you with an overview of what Trojan.Vidar.FC is, how it operates, the symptoms of infection, and most importantly, the steps to remove it from your system.

What Is Trojan.Vidar.FC?

Trojan.Vidar.FC is a type of Trojan horse malware that can compromise the security of your computer system. The name itself does not directly indicate a specific malware family, but rather serves as a detection label for the identified threat. Trojans, in general, are malicious programs that disguise themselves as legitimate software, allowing them to bypass security mechanisms and gain unauthorized access to a system. Once inside, they can cause a variety of problems, including data theft, system crashes, and the installation of additional malware.

How Trojan.Vidar.FC Operates

Like other Trojans, Trojan.Vidar.FC operates by deceiving users into installing it on their systems. This can happen through various means, such as downloading and executing malicious files from the internet, opening infected email attachments, or visiting compromised websites. Once installed, the Trojan can connect to its command and control servers to receive instructions, which might include stealing sensitive information, logging keystrokes, or using the infected computer as a botnet to spread spam or conduct denial-of-service attacks.

Symptoms of Infection

The symptoms of a Trojan.Vidar.FC infection can vary, but common signs include unusual system behavior, such as slow performance, frequent crashes, or the appearance of unwanted programs and toolbars. You might also notice that your browser settings have been altered without your consent, or that you are being redirected to suspicious websites. Additionally, if the Trojan is designed to steal data, you might notice unauthorized transactions or changes in your online accounts.

  • Unexplained changes in system settings or browser configurations
  • Appearance of unfamiliar programs or toolbars
  • Slow system performance or frequent system crashes
  • Unauthorized access to personal data or online accounts

How to Remove Trojan.Vidar.FC

  1. Boot your computer in Safe Mode with Networking to prevent the malware from loading and to give you a clean environment to work in.
  2. Use a reputable anti-malware tool, such as SpyHunter, to perform a full scan of your system. This can help identify and remove the Trojan.Vidar.FC along with any other malware that might be present.
  3. Uninstall any suspicious programs that you do not recognize or that were installed around the time the infection was detected.
  4. Reset your web browsers (Chrome, Firefox, Edge, etc.) to their default settings to remove any malicious extensions or settings changes made by the Trojan.
  5. Reboot your computer and perform another scan with your anti-malware tool to ensure that all traces of the malware have been removed.

Conclusion

Removing Trojan.Vidar.FC from your system requires careful and thorough steps to ensure that all components of the malware are eliminated. It's also crucial to adopt preventive measures to avoid future infections, such as keeping your operating system and software up to date, using strong antivirus software, and being cautious when downloading files or clicking on links from the internet. By following the removal steps outlined above and maintaining good cybersecurity practices, you can protect your system from Trojan.Vidar.FC and other types of malware, ensuring your personal data and computer remain safe.

Analysis Report

General information

Family Name: Trojan.Vidar.FC
Packers: UPX x64
Signature status: No Signature

Known Samples

MD5: d1373cc4667ec5e259d8103e745fa3b9
SHA1: 6861c2c95dbb50caf7adc02726523bcfd5c90ea2
SHA256: 8FB3E6C8BE88C6CA578D77B71CA4D63A1F84881FA4A74A76A412617F20EBAD49
File Size: 290.82 KB, 290816 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • File doesn't have debug information
  • File doesn't have exports table
  • File doesn't have relocations information
  • File doesn't have security information
  • File has been packed
  • File is 64-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is Native application (NOT .NET application)
Show More
  • IMAGE_FILE_DLL is not set inside PE header (Executable)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Traits

  • CryptUnprotectData
  • HighEntropy
  • No CryptProtectData
  • No Version Info
  • packed
  • VirtualQueryEx
  • WriteProcessMemory
  • x64

Block Information

Total Blocks: 138
Potentially Malicious Blocks: 135
Whitelisted Blocks: 3
Unknown Blocks: 0

Visual Map

x x x x x x x x x x x x x x 0 0 x 0 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

Similar Families

  • Vidar.FC

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWriteFile
  • UNKNOWN

Trending

Most Viewed

Loading...