Trojan.MSIL.Downloader.UB
Threat Scorecard
EnigmaSoft Threat Scorecard
EnigmaSoft Threat Scorecards are assessment reports for different malware threats which have been collected and analyzed by our research team. EnigmaSoft Threat Scorecards evaluate and rank threats using several metrics including real-world and potential risk factors, trends, frequency, prevalence, and persistence. EnigmaSoft Threat Scorecards are updated regularly based on our research data and metrics and are useful for a wide range of computer users, from end users seeking solutions to remove malware from their systems to security experts analyzing threats.
EnigmaSoft Threat Scorecards display a variety of useful information, including:
Popularity Rank: The ranking of a particular threat in EnigmaSoft’s Threat Database.
Severity Level: The determined severity level of an object, represented numerically, based on our risk modeling process and research, as explained in our Threat Assessment Criteria.
Infected Computers: The number of confirmed and suspected cases of a particular threat detected on infected computers as reported by SpyHunter.
See also Threat Assessment Criteria.
| Threat Level: | 80 % (High) |
| Infected Computers: | 45 |
| First Seen: | July 19, 2021 |
| Last Seen: | November 30, 2025 |
| OS(es) Affected: | Windows |
The detection of Trojan.MSIL.Downloader.UB on your system indicates a potential security threat that requires immediate attention. This report aims to provide you with a comprehensive understanding of the threat, its operational mechanisms, symptoms of infection, and most importantly, a step-by-step guide on how to remove it from your computer.
Table of Contents
What Is Trojan.MSIL.Downloader.UB?
Trojan.MSIL.Downloader.UB is identified as a Trojan-type threat. Trojans are malicious programs that can compromise the security of a computer system by allowing unauthorized access to the system. They can also be used to download and install additional malware, which can lead to further system compromise and data theft. 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.
How Trojan.MSIL.Downloader.UB Operates
Trojan.MSIL.Downloader.UB, like other Trojans, operates by disguising itself as a legitimate program or file to deceive users into installing it on their systems. Once installed, it can perform a variety of malicious activities, including but not limited to, downloading additional malware, stealing sensitive information such as passwords, credit card numbers, and personal data, and providing hackers with remote access to the infected computer. Its ability to download other malware makes it particularly dangerous, as it can lead to a wide range of secondary infections.
Symptoms of Infection
The symptoms of a Trojan.MSIL.Downloader.UB infection can vary widely, depending on the specific goals of the malware and the secondary infections it may download. Common symptoms include slow system performance, frequent crashes, and unusual network activity. You might also notice unfamiliar programs or toolbars in your browser, changes to your homepage, or an increase in pop-up advertisements. In some cases, the infection may not exhibit noticeable symptoms, making regular system scans crucial for detection.
How to Remove Trojan.MSIL.Downloader.UB
- Boot into Safe Mode with Networking: This will limit the malware's ability to interfere with the removal process. To do this, restart your computer and repeatedly press the F8 key until the Windows Advanced Options menu appears, then select Safe Mode with Networking.
- Perform a Full Scan with a Reputable Tool: Use an anti-malware tool such as SpyHunter to perform a full scan of your system. Ensure the tool is updated with the latest definitions before scanning to increase the chances of detecting and removing the malware.
- Uninstall Suspicious Programs: Go through the list of installed programs on your computer and uninstall any that you do not recognize or that were installed around the time the infection was detected.
- Reset Your Browsers: Resetting your browsers (Chrome, Firefox, Edge) to their default settings can help remove any malicious extensions or settings that the malware may have installed. You can usually find this option in the browser's settings or preferences menu.
- Reboot and Re-scan: After completing the above steps, reboot your computer in normal mode and perform another full scan with your anti-malware tool to ensure that all traces of the malware have been removed.
Conclusion
Removing Trojan.MSIL.Downloader.UB from your system requires careful and thorough action to ensure all components of the malware are eliminated. By following the steps outlined in this report, you should be able to successfully remove the threat and secure your computer against future infections. Remember, prevention is key; keeping your operating system, software, and security tools up to date, along with practicing safe browsing habits, can significantly reduce the risk of falling victim to such malware in the future.
Analysis Report
General information
| Family Name: | Trojan.MSIL.Downloader.UB |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
424f9554ce2b7c039396207a52072d50
SHA1:
70d90fdc9332ce565d8352cdf2e2bbf9981f9b44
SHA256:
D8E32F96E4511381741F78245E772C25CFD60FD93FB21487F0D7D51A2095D9C4
File Size:
172.54 KB, 172544 bytes
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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)
File Icons
File Icons
This section displays icon resources found within family samples. Malware often replicates icons commonly associated with legitimate software to mislead users into believing the malware is safe.
Windows PE Version Information
Windows PE Version Information
This section displays values and attributes that have been set in the Windows file version information data structure for samples within this family. To mislead users, malware actors often add fake version information mimicking legitimate software.| Name | Value |
|---|---|
| Assembly Version | 1.0.0.0 |
| File Description | Lime-Crypter |
| File Version | 1.0.0.0 |
| Internal Name | Lime-Crypter.exe |
| Legal Copyright | Copyright © 2019 |
| Original Filename | Lime-Crypter.exe |
| Product Name | Lime-Crypter |
| Product Version | 1.0.0.0 |
File Traits
- .NET
- RijndaelManaged
- x86
Block Information
Block Information
During analysis, EnigmaSoft breaks file samples into logical blocks for classification and comparison with other samples. Blocks can be used to generate malware detection rules and to group file samples into families based on shared source code, functionality and other distinguishing attributes and characteristics. This section lists a summary of this block data, as well as its classification by EnigmaSoft. A visual representation of the block data is also displayed, where available.| Total Blocks: | 44 |
|---|---|
| Potentially Malicious Blocks: | 22 |
| Whitelisted Blocks: | 21 |
| Unknown Blocks: | 1 |
Visual Map
? - Unknown Block
x - Potentially Malicious Block
Similar Families
Similar Families
This section lists other families that share similarities with this family, based on EnigmaSoft’s analysis. Many malware families are created from the same malware toolkits and use the same packing and encryption techniques but uniquely extend functionality. Similar families may also share source code, attributes, icons, subcomponents, compromised and/or invalid digital signatures, and network characteristics. Researchers leverage these similarities to rapidly and effectively triage file samples and extend malware detection rules.- LimeCrypt.A
Windows API Usage
Windows API Usage
This section lists Windows API calls that are used by the samples in this family. Windows API usage analysis is a valuable tool that can help identify malicious activity, such as keylogging, security privilege escalation, data encryption, data exfiltration, interference with antivirus software, and network request manipulation.| Category | API |
|---|---|
| User Data Access |
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| Anti Debug |
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| Encryption Used |
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