Threat Database Trojans Trojan.MSIL.Downloader.Agent.A

Trojan.MSIL.Downloader.Agent.A

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 608
First Seen: March 30, 2021
Last Seen: December 27, 2025
OS(es) Affected: Windows

The detection of Trojan.MSIL.Downloader.Agent.A indicates that your system has been compromised by a potentially malicious program. This type of threat is designed to download and install additional malware onto your computer, which can lead to a range of problems, including data theft, system crashes, and unauthorized access to your personal information. It is essential to take immediate action to remove this threat and prevent further damage to your system.

What Is Trojan.MSIL.Downloader.Agent.A?

Trojan.MSIL.Downloader.Agent.A is a type of Trojan horse malware that is designed to download and install additional malware onto your computer. The name "Trojan.MSIL" suggests that this malware is written in Microsoft Intermediate Language (MSIL), which is a programming language used by the .NET Framework. The "Downloader" part of the name indicates that this malware is capable of downloading additional files from the internet, whileAgent.Amay refer to a specific variant or component of the malware.

How Trojan.MSIL.Downloader.Agent.A Operates

Trojan.MSIL.Downloader.Agent.A 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 also modify your system settings, steal your personal data, and disrupt your internet connection. It may also attempt to contact its command and control server to receive updates or send stolen data back to the malware authors.

Symptoms of Infection

The symptoms of a Trojan.MSIL.Downloader.Agent.A infection can vary, but common signs include slow system performance, unexpected pop-ups or ads, and unfamiliar programs or icons on your desktop. You may also notice that your internet connection is slower than usual or that your system is crashing frequently. In some cases, you may not notice any symptoms at all, which is why it's essential to run regular virus scans and keep your antivirus software up to date.

  • Slow system performance
  • Unexpected pop-ups or ads
  • Unfamiliar programs or icons on your desktop
  • Slow internet connection
  • Frequent system crashes

How to Remove Trojan.MSIL.Downloader.Agent.A

  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. Download and install a reputable antivirus tool, such as SpyHunter, and run a full scan of your system to detect and remove the malware.
  3. Uninstall any suspicious programs or applications that you don't recognize or that were installed around the time of the infection.
  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 scan to ensure that the malware has been completely removed.

Conclusion

Removing Trojan.MSIL.Downloader.Agent.A from your system requires careful attention to detail and a thorough understanding of how the malware operates. By following the steps outlined above, you can help to ensure that your system is clean and free of malware. It's also essential to take steps to prevent future infections, including keeping your antivirus software up to date, avoiding suspicious downloads and email attachments, and using strong passwords and enabling two-factor authentication whenever possible. By staying vigilant and taking proactive steps to protect your system, you can help to keep your personal data and computer safe from harm.

Analysis Report

General information

Family Name: Trojan.MSIL.Downloader.Agent.A
Signature status: No Signature

Known Samples

MD5: 3bd000d3c7cc6781bbb6ae6478c92236
SHA1: cd59648b3987487832a34af706d68e84886165b9
SHA256: FDFC76DE879C7C377CE2E0FC97DF882A212771B8E5B2E3336AD94EBC7D636C92
File Size: 197.59 KB, 197592 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 is .NET application
  • File is 32-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is not packed
  • IMAGE_FILE_DLL is not set inside PE header (Executable)
Show More
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

Windows PE Version Information

Name Value
Assembly Version 1.0.0.0
Comments Modified by an unpaid evaluation copy of Resource Tuner 2 (www.heaventools.com)
File Description Register
File Version 1.0.0.0
Internal Name Register Me.exe
Legal Copyright Copyright © Microsoft 2014
Original Filename Register Me.exe
Product Name Register
Product Version 1.0.0.0

File Traits

  • .NET
  • .sdata
  • HighEntropy
  • Reactor
  • RijndaelManaged
  • x86

Block Information

Total Blocks: 202
Potentially Malicious Blocks: 108
Whitelisted Blocks: 94
Unknown Blocks: 0

Visual Map

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

Similar Families

  • MSIL.Downloader.Agent.A

Windows API Usage

Category API
User Data Access
  • GetUserDefaultLocaleName
  • GetUserObjectInformation
Encryption Used
  • BCryptOpenAlgorithmProvider
  • CryptAcquireContext
Anti Debug
  • CheckRemoteDebuggerPresent
  • IsDebuggerPresent

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