Threat Database Trojans Trojan.Downloader.GDC

Trojan.Downloader.GDC

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 2
First Seen: November 20, 2024
Last Seen: August 15, 2025
OS(es) Affected: Windows

The detection of Trojan.Downloader.GDC on your system indicates a potential security threat that requires immediate attention. This type of threat is designed to download and install additional malware on your computer, which can lead to a range of problems, including data theft, system crashes, and unauthorized access to your personal information. In this report, we will provide an overview of what Trojan.Downloader.GDC is, how it operates, and the steps you can take to remove it from your system.

What Is Trojan.Downloader.GDC?

Trojan.Downloader.GDC is a type of Trojan horse malware that is designed to download and install additional malware on your computer. The name "Trojan" refers to the fact that this type of malware disguises itself as a legitimate program or file, but actually contains malicious code. The "Downloader" part of the name indicates that this malware is capable of downloading additional malware from the internet, which can lead to a range of problems. The "GDC" part of the name is likely a signature or identifier used by the malware authors, but it does not provide any specific information about the malware's functionality or purpose.

How Trojan.Downloader.GDC Operates

Trojan.Downloader.GDC operates by exploiting vulnerabilities in your system or tricking you into installing it. Once installed, it can download and install additional malware, including viruses, spyware, and adware. This malware can then steal your personal information, crash your system, or display unwanted advertisements. Trojan.Downloader.GDC can also create backdoors on your system, allowing hackers to access your computer remotely and steal your sensitive information. The malware can spread through various means, including infected email attachments, contaminated software downloads, and exploited vulnerabilities in your system.

Symptoms of Infection

If your system is infected with Trojan.Downloader.GDC, you may notice a range of symptoms, including slow system performance, unwanted pop-ups and advertisements, and unexpected crashes or freezes. You may also notice that your system is behaving erratically, or that your personal information is being stolen. In some cases, you may not notice any symptoms at all, which is why it's essential to run regular virus scans and maintain up-to-date antivirus software. Some common symptoms of infection include unusual network activity, unfamiliar programs or files on your system, and changes to your system settings or configuration.

  • Slow system performance
  • Unwanted pop-ups and advertisements
  • Unexpected crashes or freezes
  • Unusual network activity
  • Unfamiliar programs or files on your system
  • Changes to your system settings or configuration

How to Remove Trojan.Downloader.GDC

  1. Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow you to download and install removal tools.
  2. Run a full scan of your system using a reputable antivirus tool, such as SpyHunter, to detect and remove the malware.
  3. Uninstall any suspicious programs or applications that may be related to the malware.
  4. Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or add-ons.
  5. Reboot your system and run another full scan to ensure that the malware has been completely removed.

Conclusion

Removing Trojan.Downloader.GDC from your system requires careful attention to detail and a thorough understanding of the malware's behavior. By following the steps outlined in this report, you can help to ensure that your system is safe and secure. It's essential to maintain up-to-date antivirus software and to run regular virus scans to prevent future infections. Additionally, being cautious when downloading software or opening email attachments can help to prevent the spread of malware. Remember to always prioritize your system's security and take immediate action if you suspect that your system has been infected with malware.

Analysis Report

General information

Family Name: Trojan.Downloader.GDC
Packers: UPX!
Signature status: No Signature

Known Samples

MD5: 8dd0ed26926fe27f8ee326fdc58fd061
SHA1: ccbac9846fcab4225abe57f9fa15246511df8d86
SHA256: E8AEE8BADA975CBAC687E500985699211B643F115E84C70A67AEC1EA21784445
File Size: 3.92 MB, 3919872 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 security information
  • File has been packed
  • File has TLS information
  • 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)
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  • IMAGE_FILE_DLL is not set inside PE header (Executable)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Traits

  • dll
  • x64

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtQueryInformationProcess
  • ntdll.dll!NtQueryInformationThread
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWriteFile
  • ntdll.dll!NtWriteVirtualMemory
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  • win32u.dll!NtUserGetKeyboardLayout
  • win32u.dll!NtUserGetThreadState

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