Threat Database Trojans Trojan.MSIL.Downloader.WAF

Trojan.MSIL.Downloader.WAF

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 1
First Seen: June 21, 2024
Last Seen: February 18, 2026
OS(es) Affected: Windows

The detection of Trojan.MSIL.Downloader.WAF on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to download and install additional malicious software on your computer, which can lead to a range of problems, including data theft, system crashes, and unauthorized access to your personal information.

What Is Trojan.MSIL.Downloader.WAF?

Trojan.MSIL.Downloader.WAF is a type of Trojan horse malware that uses deceptive tactics to infiltrate your system. The name suggests that it is written in MSIL (Microsoft Intermediate Language), which is a platform-agnostic bytecode that can be executed by the .NET Common Language Runtime (CLR). This allows the malware to run on any system that supports .NET, making it a versatile and potentially widespread threat.

How Trojan.MSIL.Downloader.WAF Operates

Once installed, Trojan.MSIL.Downloader.WAF can download and install additional malware, including viruses, spyware, and adware, without your knowledge or consent. This can happen through various means, such as exploited vulnerabilities, drive-by downloads, or social engineering tactics. The malware may also communicate with its command and control servers to receive updates, transmit stolen data, or receive instructions from its creators.

Symptoms of Infection

The symptoms of a Trojan.MSIL.Downloader.WAF infection can vary, but common signs include slow system performance, unexpected pop-ups and advertisements, and suspicious network activity. You may also notice that your browser homepage or search engine has been changed, or that new, unfamiliar programs have been installed on your system. In some cases, the malware may not exhibit any noticeable symptoms, making it difficult to detect without the aid of security software.

How to Remove Trojan.MSIL.Downloader.WAF

  1. Restart your computer in Safe Mode with Networking to prevent the malware from interfering with the removal process.
  2. Run a full scan with a reputable anti-malware tool, such as SpyHunter, to detect and remove all instances of the malware.
  3. Uninstall any suspicious programs or applications that you do not recognize or that were installed without your consent.
  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 all remnants of the malware have been removed.

Conclusion

Removing Trojan.MSIL.Downloader.WAF from your system requires a combination of technical expertise and caution. By following the steps outlined above and using reputable security software, you can help protect your system and personal data from the threats posed by this malware. It is essential to remain vigilant and proactive in maintaining your system's security, as new threats emerge daily. Regularly updating your operating system, browser, and security software can help prevent similar infections in the future.

Analysis Report

General information

Family Name: Trojan.MSIL.Downloader.WAF
Signature status: No Signature

Known Samples

MD5: e60cb410dbe1904fcd57ffb29cf2aaab
SHA1: e88325a91ef3ea6777bfff132422394d56f49eb0
SHA256: 3836CE3C80998826F62FC0ECD4D6F93E3B03FBD8A426E2EF73805858CFE622E0
File Size: 14.34 KB, 14336 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • 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)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

Windows PE Version Information

Name Value
Assembly Version 4144.8870.99.99
Comments ok
Company Name ok
File Description ok
File Version 099.9990.99.88
Internal Name ok.exe
Legal Copyright Copyright © 2021
Legal Trademarks ok
Original Filename ok.exe
Product Name ok
Product Version 099.9990.99.88

File Traits

  • .NET
  • NewLateBinding
  • x86

Block Information

Total Blocks: 39
Potentially Malicious Blocks: 7
Whitelisted Blocks: 32
Unknown Blocks: 0

Visual Map

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x x x x x x x 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.BadJoke.XH
  • MSIL.Downloader.WAF
  • MSIL.Krypt.EEBT
  • MSIL.Krypt.JUB
  • MSIL.Perseus.P
Show More
  • MSIL.RunescapeHack.D

Files Modified

File Attributes
c:\users\user\appdata\local\temp\server.exe Generic Write,Read Attributes

Registry Modifications

Key::Value Data API Name
HKLM\software\wow6432node\microsoft\tracing::enableconsoletracing RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::enablefiletracing RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::enableautofiletracing RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::enableconsoletracing RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::filetracingmask ￿ RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::consoletracingmask ￿ RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::maxfilesize  RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasapi32::filedirectory %windir%\tracing RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::enablefiletracing RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::enableautofiletracing RegNtPreCreateKey
Show More
HKLM\software\wow6432node\microsoft\tracing\rasmancs::enableconsoletracing RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::filetracingmask ￿ RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::consoletracingmask ￿ RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::maxfilesize  RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\tracing\rasmancs::filedirectory %windir%\tracing RegNtPreCreateKey

Windows API Usage

Category API
User Data Access
  • GetComputerName
  • GetUserDefaultLocaleName
  • GetUserObjectInformation
Anti Debug
  • IsDebuggerPresent
  • NtQuerySystemInformation
Encryption Used
  • BCryptOpenAlgorithmProvider
Other Suspicious
  • AdjustTokenPrivileges
Network Winsock2
  • WSAConnect
  • WSASocket
  • WSAStartup
  • WSAttemptAutodialName
Network Winsock
  • closesocket
  • freeaddrinfo
  • getaddrinfo
  • recv
  • send
  • setsockopt
Network Winhttp
  • WinHttpOpen
Network Info Queried
  • GetAdaptersAddresses
  • GetNetworkParams

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