PUP.MysteriumDark
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.
| Popularity Rank: | 8,841 |
| Threat Level: | 10 % (Normal) |
| Infected Computers: | 295 |
| First Seen: | December 2, 2025 |
| Last Seen: | July 23, 2026 |
| OS(es) Affected: | Windows |
The detection of PUP.MysteriumDark on your system indicates the presence of a potentially unwanted program (PUP) that may be causing issues with your computer's performance and security. It's essential to understand the nature of this threat and take appropriate steps to remove it to prevent any potential harm.
Table of Contents
What Is PUP.MysteriumDark?
PUP.MysteriumDark is a type of malware that is classified as a potentially unwanted program. This means that it may not be as harmful as other types of malware, such as viruses or Trojans, but it can still cause problems with your system. PUPs are often installed without the user's knowledge or consent, and they can be used to display unwanted advertisements, collect user data, or install other malicious software.
How PUP.MysteriumDark Operates
PUP.MysteriumDark, like other PUPs, can operate in various ways. It may be installed as a software bundle, where it is included with other programs that the user intentionally installs. Alternatively, it may be downloaded from the internet and installed without the user's knowledge. Once installed, PUP.MysteriumDark can start to display unwanted advertisements, collect user data, or install other malicious software. It may also modify system settings, such as changing the default search engine or homepage, to generate revenue for its creators.
Symptoms of Infection
If your system is infected with PUP.MysteriumDark, you may notice several symptoms. These can include unwanted advertisements or pop-ups, slow system performance, and changes to your browser settings. You may also notice that your system is running slowly, or that your browser is crashing frequently. Additionally, you may see unfamiliar programs or icons on your desktop, or receive unexpected notifications or alerts.
- Unwanted advertisements or pop-ups
- Slow system performance
- Changes to browser settings, such as a new default search engine or homepage
- Slow browser performance or frequent crashes
- Unfamiliar programs or icons on the desktop
- Unexpected notifications or alerts
How to Remove PUP.MysteriumDark
- Boot your system in Safe Mode with Networking to prevent PUP.MysteriumDark from loading and to allow for a more effective removal process.
- Use a reputable anti-malware tool, such as SpyHunter, to perform a full scan of your system and detect any malicious software, including PUP.MysteriumDark.
- Uninstall any suspicious programs that may be related to PUP.MysteriumDark. Be cautious when uninstalling programs, as some may be legitimate or required by your system.
- Reset your browser settings to their default values. This can typically be done by going to the browser's settings or options menu and selecting the "Reset" or "Restore defaults" option. Specifically, reset Chrome, Firefox, and Edge browsers to remove any changes made by PUP.MysteriumDark.
- Reboot your system and perform another scan with your anti-malware tool to ensure that PUP.MysteriumDark has been completely removed.
Conclusion
Removing PUP.MysteriumDark from your system is crucial to prevent any potential harm and to restore your system's performance and security. By following the steps outlined above, you can effectively remove this potentially unwanted program and protect your system from similar threats in the future. It's also essential to practice safe computing habits, such as avoiding suspicious downloads and being cautious when installing software, to prevent PUPs and other types of malware from infecting your system.
SpyHunter Detects & Remove PUP.MysteriumDark
File System Details
| # | File Name | MD5 |
Detections
Detections: The number of confirmed and suspected cases of a particular threat detected on
infected computers as reported by SpyHunter.
|
|---|---|---|---|
| 1. | temp-mysteriumdark-setup-10.17.10.exe | 6b29d0e5e5297f5a8c818c8397826cbd | 158 |
| 2. | mysteriumdark.exe | 769550123f50aea79cd754aa062fc0de | 21 |
