Threat Database Trojans Trojan.MSIL.Small.U

Trojan.MSIL.Small.U

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 39
First Seen: September 29, 2021
Last Seen: June 11, 2024
OS(es) Affected: Windows

The detection of Trojan.MSIL.Small.U on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to compromise the integrity of your computer, steal sensitive information, or disrupt its normal functioning. It is essential to understand the nature of this threat and take prompt action to remove it and prevent future infections.

What Is Trojan.MSIL.Small.U?

Trojan.MSIL.Small.U 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 is written in MSIL (Microsoft Intermediate Language), which is a platform-agnostic, object-oriented programming language used by the .NET Framework. Trojans like Trojan.MSIL.Small.U can be particularly dangerous because they can open a backdoor on the infected computer, allowing attackers to access the system remotely and perform various malicious activities.

How Trojan.MSIL.Small.U Operates

Once Trojan.MSIL.Small.U infects a computer, it can operate in various ways, depending on its design and the intentions of its creators. Commonly, Trojans of this type can create backdoors, allowing unauthorized access to the infected system. They can also be used to install additional malware, steal personal data, log keystrokes, or even use the infected computer as part of a botnet for distributed denial-of-service (DDoS) attacks or spamming. The specific operations of Trojan.MSIL.Small.U can vary, but the goal is often to exploit the infected system for financial gain or to cause disruption.

Symptoms of Infection

Identifying a Trojan.MSIL.Small.U infection can be challenging because Trojans are designed to remain stealthy. However, some common symptoms may indicate an infection: unexpected changes in system performance, such as slowdowns or frequent crashes; appearance of unwanted programs or toolbars in your browser; unexpected network activity; or pop-ups and other unwanted advertisements. If you suspect your computer is infected, it's crucial to act quickly to minimize potential damage.

How to Remove Trojan.MSIL.Small.U

  1. Boot your computer in Safe Mode with Networking to prevent the malware from loading and to allow for a clean environment to perform removal steps.
  2. Use a reputable anti-malware tool, such as SpyHunter, to perform a full scan of your system. Ensure the tool is updated with the latest definitions to increase the chances of detecting and removing Trojan.MSIL.Small.U.
  3. Uninstall any suspicious programs that you do not recognize or that were installed around the time you noticed the infection. Be cautious and only remove programs you are certain are not essential to your system's operation.
  4. Reset your browsers (Chrome, Firefox, Edge, etc.) to their default settings to remove any malicious extensions or settings changes made by the Trojan.
  5. After completing the above steps, reboot your computer and perform another full scan with your anti-malware tool to ensure that the threat has been completely removed.

Conclusion

Removing Trojan.MSIL.Small.U from your system requires careful and immediate action to prevent further damage. By understanding the nature of this threat and following the removal steps outlined, you can help protect your computer and personal data from malicious activities. It's also important to adopt preventive measures, such as keeping your operating system and software up to date, using strong antivirus software, and being cautious when opening email attachments or downloading software from the internet. Staying informed and vigilant is key to maintaining the security and integrity of your digital environment.

Analysis Report

General information

Family Name: Trojan.MSIL.Small.U
Signature status: Format Error

Known Samples

MD5: 2a50cf4fddd255b09f289e5df0936cf0
SHA1: a9d148d8c29bce6a67f3f0f2fcaee0af4e756266
SHA256: 4058FD2C813C2F08855AC2A4392F5BD82391051B195DE4AA4013F29C6FF5FE28
File Size: 4.46 MB, 4464386 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 has TLS information
  • File is 32-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is Native application (NOT .NET application)
  • File is not packed
Show More
  • IMAGE_FILE_DLL is not set inside PE header (Executable)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Icons

Windows PE Version Information

Name Value
Comments This installation was built with Inno Setup.
Company Name GP SOFT
File Description PIT Projekt 2014 Setup
File Version 3.0.9
Legal Copyright Copyright © 2012-2015 GP SOFT
Product Name PIT Projekt 2014
Product Version 3.0.9

File Traits

  • .NET
  • dll
  • HighEntropy
  • ntdll
  • RijndaelManaged
  • x86

Files Modified

File Attributes
c:\users\user\appdata\local\temp\is-m5nr3.tmp\a9d148d8c29bce6a67f3f0f2fcaee0af4e756266_0004464386.tmp Generic Write,Read Attributes

Windows API Usage

Category API
Process Manipulation Evasion
  • NtUnmapViewOfSection
Process Shell Execute
  • CreateProcess

Shell Command Execution

"C:\Users\Kssxpcrc\AppData\Local\Temp\is-M5NR3.tmp\a9d148d8c29bce6a67f3f0f2fcaee0af4e756266_0004464386.tmp" /SL5="$30048,4175520,56832,c:\users\user\downloads\a9d148d8c29bce6a67f3f0f2fcaee0af4e756266_0004464386"

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