Trojan.Quasar.A
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: | 21 |
| First Seen: | August 27, 2021 |
| Last Seen: | March 23, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.Quasar.A on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to compromise the security and integrity of your computer, and if left unchecked, can lead to serious consequences, including data theft, system crashes, and unauthorized access to your personal information.
Table of Contents
What Is Trojan.Quasar.A?
Trojan.Quasar.A is a type of Trojan horse malware, which is a broad category of malicious software that disguises itself as legitimate or harmless. The name "Trojan" refers to the malware's ability to deceive users into installing or executing it, often by masquerading as a useful or innocuous program. Trojan horses can be used to install additional malware, steal sensitive information, or provide unauthorized access to the infected system.
How Trojan.Quasar.A Operates
Once installed, Trojan.Quasar.A can operate in various ways, depending on its intended purpose. It may attempt to connect to a command and control server to receive instructions or transmit stolen data. The malware may also try to install additional components or update itself to evade detection. In some cases, Trojan horses can create backdoors, allowing hackers to access the infected system remotely. The exact behavior of Trojan.Quasar.A can vary, but its primary goal is to compromise the security and integrity of the infected system.
Symptoms of Infection
Identifying the symptoms of a Trojan.Quasar.A infection can be challenging, as the malware is designed to operate stealthily. However, some common indicators of a potential infection include unusual system behavior, such as slow performance, frequent crashes, or unexpected pop-ups. You may also notice unfamiliar programs or icons on your system, or experience difficulties with your internet connection. If you suspect that your system has been infected with Trojan.Quasar.A, it is essential to take immediate action to remove the malware and prevent further damage.
How to Remove Trojan.Quasar.A
- Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow for internet access. This will enable you to download and install removal tools.
- Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter. This will help detect and remove the Trojan.Quasar.A malware and any associated components.
- Uninstall any suspicious programs or applications that you do not recognize or that were installed without your consent. Be cautious when removing programs, as some may be legitimate or required by your system.
- Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings. This will help remove any malicious extensions or add-ons that may be associated with the Trojan.Quasar.A infection.
- Reboot your system and perform a follow-up scan using your anti-malware tool to ensure that the malware has been completely removed. If the malware is still detected, you may need to repeat the removal process or seek additional assistance.
Conclusion
Removing Trojan.Quasar.A from your system requires careful attention to detail and a thorough understanding of the malware's behavior. By following the steps outlined above and using reputable removal tools, you can help protect your system and prevent further damage. It is essential to remain vigilant and proactive in maintaining your system's security, as new threats and vulnerabilities are constantly emerging. By staying informed and taking the necessary precautions, you can help ensure the integrity and security of your computer and personal data.
Analysis Report
General information
| Family Name: | Trojan.Quasar.A |
|---|---|
| Signature status: | Hash Mismatch |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
474db2cfd12cd142ce9ea36cc1946ed3
SHA1:
5d7bc5bb7f672424fa2c838174301aa9c78868c3
SHA256:
F2EDC0379420DA6E9BC4884A13B85A0C4FD8A68A7B659AF21C65572776823633
File Size:
2.68 MB, 2684872 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have debug information
- File doesn't have relocations information
- File has exports table
- 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)
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- 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 |
|---|---|
| Company Name | 金山软件股份有限公司 |
| File Description | JxOnline Client |
| File Version | 3, 0, 0, 6 |
| Internal Name | Game |
| Legal Copyright | 版权所有 (C) 1995-2004 金山软件股份有限公司 |
| Original Filename | Game.exe |
| Product Name | SwordOnline |
| Product Version | 3.00.00.2003 |
Digital Signatures
Digital Signatures
This section lists digital signatures that are attached to samples within this family. When analyzing and verifying digital signatures, it is important to confirm that the signature’s root authority is a well-known and trustworthy entity and that the status of the signature is good. Malware is often signed with non-trustworthy “Self Signed” digital signatures (which can be easily created by a malware author with no verification). Malware may also be signed by legitimate signatures that have an invalid status, and by signatures from questionable root authorities with fake or misleading “Signer” names.| Signer | Root | Status |
|---|---|---|
| Chengdu Xishanju Interactive Entertainment Co. Ltd | VeriSign Class 3 Code Signing 2010 CA | Hash Mismatch |
File Traits
- WriteProcessMemory
- 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: | 7,604 |
|---|---|
| Potentially Malicious Blocks: | 4,526 |
| Whitelisted Blocks: | 3,078 |
| Unknown Blocks: | 0 |
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.- Quasar.A
