Threat Database Trojans Trojan.MSIL.Krypt.VAA

Trojan.MSIL.Krypt.VAA

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 3,359
First Seen: January 3, 2013
Last Seen: December 12, 2025
OS(es) Affected: Windows

The detection of Trojan.MSIL.Krypt.VAA on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to infiltrate and compromise your computer, potentially leading to unauthorized access, data theft, and other malicious activities. It is essential to understand the nature of this threat and take prompt action to remove it and protect your system.

What Is Trojan.MSIL.Krypt.VAA?

Trojan.MSIL.Krypt.VAA is a type of Trojan horse malware, which is a broad category of malicious software that disguises itself as legitimate programs. The name suggests it may be related to the .NET framework (MSIL stands for Microsoft Intermediate Language) and could involve encryption or cryptographic functions (Krypt), but without specific details, it's crucial to focus on general principles of malware removal and system protection.

How Trojan.MSIL.Krypt.VAA Operates

Trojan horses like Trojan.MSIL.Krypt.VAA typically operate by deceiving users into installing them, often by masquerading as useful software or attachments. Once installed, they can perform a variety of malicious functions, including but not limited to, stealing personal data, installing additional malware, providing unauthorized access to the infected system, and disrupting system operation. The specific operations of Trojan.MSIL.Krypt.VAA would depend on its design and the intentions of its creators, but the general approach to mitigation remains consistent with other Trojans.

Symptoms of Infection

Symptoms of a Trojan infection can vary widely but may include unexpected changes to your system, such as new programs or icons appearing, unusual network activity, slow system performance, and unexpected pop-ups or alerts. Sometimes, infections may not exhibit obvious symptoms, making regular system scans with anti-malware tools crucial for detection.

How to Remove Trojan.MSIL.Krypt.VAA

  1. Enter Safe Mode with Networking to limit the malware's ability to interfere with the removal process. This mode allows you to use the internet to download necessary tools while restricting the operation of most malware.
  2. Download and run a full scan with a reputable anti-malware tool, such as SpyHunter. Ensure the tool is updated to the latest version to increase the chances of detecting and removing the malware.
  3. Uninstall any recently installed programs that you do not recognize or no longer need. Be cautious and review each program carefully to avoid removing necessary system components.
  4. Reset your web browsers (Chrome, Firefox, Edge, etc.) to their default settings. This can help remove any malicious extensions or settings that the malware might have installed.
  5. Reboot your system and run another full scan with your anti-malware tool to ensure that the malware has been completely removed. Repeat this process if the malware is still detected until your system is clean.

Conclusion

Removing Trojan.MSIL.Krypt.VAA and protecting your system from future infections require vigilance and the right tools. By understanding how Trojans operate and following the steps outlined above, you can significantly reduce the risk of infection and keep your system and data safe. Regularly updating your operating system, using strong antivirus software, avoiding suspicious downloads, and being cautious with email attachments are key practices in preventing malware infections. If you're unsure about any part of the removal process, consider consulting with a cybersecurity professional to ensure your system is thoroughly cleaned and protected.

Analysis Report

General information

Family Name: Trojan.MSIL.Krypt.VAA
Signature status: No Signature

Known Samples

MD5: 0963a72804b90f566eb2754f8c6a3af2
SHA1: f9423d32e612451cc2e53c2bdf101ad70468827d
SHA256: 16AEAA7EFF91A40984C42066BCE47F17545D9C0478850575741C6AFDD328141F
File Size: 183.30 KB, 183296 bytes
MD5: cf07ef9e5dc0a7c386637974c9733cca
SHA1: 5e0c9133eca9b424624b761a27f3812df827704e
SHA256: E8F58969694B57552D15189F2942B202B57F90D23AE9E068AE7DB0E086EE31A8
File Size: 813.06 KB, 813056 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 Space Complexity Calculator
File Description SpaceCalculator
File Version 1.0.0.0
Internal Name bpNG.exe
Legal Copyright Copyright © 2025
Original Filename bpNG.exe
Product Name SpaceCalculator
Product Version 1.0.0.0

File Traits

  • .NET
  • HighEntropy
  • No Version Info
  • x86

Block Information

Total Blocks: 205
Potentially Malicious Blocks: 2
Whitelisted Blocks: 51
Unknown Blocks: 152

Visual Map

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

Files Modified

File Attributes
c:\users\user\appdata\local\temp\tmp8964.tmp Generic Write,Read Attributes
c:\users\user\appdata\roaming\bfeb5820-9643-42ad-a79f-071dff4d8e64\run.dat Generic Write,Read Attributes

Windows API Usage

Category API
User Data Access
  • GetComputerName
  • GetUserDefaultLocaleName
  • GetUserName
  • GetUserObjectInformation
Encryption Used
  • BCryptOpenAlgorithmProvider
Anti Debug
  • IsDebuggerPresent
  • NtQuerySystemInformation
Process Shell Execute
  • CreateProcess
Network Winsock2
  • WSASend
  • WSASocket
  • WSAStartup
Network Winsock
  • bind
  • closesocket
  • getpeername
  • setsockopt

Shell Command Execution

"schtasks.exe" /create /f /tn "SMTP Subsystem" /xml "C:\Users\Cpinbezc\AppData\Local\Temp\tmp8964.tmp"

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