Trojan.MSIL.Quasar.S
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: | 2 |
| First Seen: | November 28, 2025 |
| Last Seen: | March 20, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.MSIL.Quasar.S indicates that your system has been compromised by a potentially malicious program. This type of threat is typically designed to gain unauthorized access to a computer system, allowing attackers to steal sensitive information, disrupt operations, or use the infected machine for further malicious activities. It is essential to understand the nature of this threat and take prompt action to remove it and prevent future infections.
Table of Contents
What Is Trojan.MSIL.Quasar.S?
Trojan.MSIL.Quasar.S 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 Quasar family of malware, but without more specific information, it's crucial to focus on the general characteristics of Trojan horses and the steps needed for removal and prevention. Trojan horses are known for their ability to deceive users into installing them, often by bundling themselves with legitimate software or posing as useful applications.
How Trojan.MSIL.Quasar.S Operates
Once installed, Trojan.MSIL.Quasar.S can operate in various ways, depending on its intended purpose. It might create backdoors for remote access, allowing attackers to control the infected system. It could also be designed to steal personal data, such as login credentials, credit card numbers, or other sensitive information. Additionally, Trojans can download and install additional malware, leading to further system compromise. Understanding how Trojans operate is key to realizing the importance of swift and effective removal.
Symptoms of Infection
Identifying a Trojan infection can be challenging due to their stealthy nature. However, there are several symptoms that might indicate the presence of malware like Trojan.MSIL.Quasar.S. These include unusual system behavior, such as slow performance, frequent crashes, or unfamiliar programs and icons. You might also notice increased network activity, even when you're not using the internet, or find that your antivirus software is disabled. Being vigilant about these signs can help in detecting and addressing the issue early on.
How to Remove Trojan.MSIL.Quasar.S
- Boot your computer in Safe Mode with Networking to limit the malware's ability to interfere with the removal process.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter, to detect and remove all instances of the Trojan.
- Uninstall any suspicious programs that you don't recognize or that were installed around the time the infection was detected.
- Reset your web browsers (Chrome, Firefox, Edge) to their default settings to remove any malicious extensions or settings that the Trojan might have altered.
- Reboot your computer and run another full scan with your anti-malware tool to ensure that all components of the Trojan have been removed.
Following these steps carefully can help in thoroughly removing Trojan.MSIL.Quasar.S from your system. However, prevention is also key, so it's essential to be cautious when downloading software, avoid suspicious links, and keep your operating system and security software up to date.
Conclusion
The removal of Trojan.MSIL.Quasar.S requires a combination of the right tools and careful action. By understanding the nature of this threat and following the outlined steps, you can effectively remove the malware and take steps to protect your system against future infections. Remember, vigilance and proactive security measures are crucial in the ongoing battle against malware and other cyber threats. Keeping your system secure is an ongoing process that requires attention to software updates, cautious internet browsing, and the use of reputable security software.
Analysis Report
General information
| Family Name: | Trojan.MSIL.Quasar.S |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
ae939bf5e4ddde491a82c4065bbe4d3e
SHA1:
2e1ed06c6cba8fc4db1d33391a0f8033f441356f
SHA256:
055AACEBBC9CCDDFBE9A9B11BE1BE9AB0CD675C5AF9E2EDFEC88E4D62C827926
File Size:
1.37 MB, 1371136 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 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
- IMAGE_FILE_DLL is not set inside PE header (Executable)
Show More
- IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)
File Traits
- HighEntropy
- No Version Info
- 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: | 2,617 |
|---|---|
| Potentially Malicious Blocks: | 326 |
| Whitelisted Blocks: | 2,291 |
| Unknown Blocks: | 0 |
Visual Map
? - Unknown Block
x - Potentially Malicious Block
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 |
|
| Anti Debug |
|
