Backdoor.Quasar.BB
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: | 13,665 |
| Threat Level: | 60 % (Medium) |
| Infected Computers: | 67 |
| First Seen: | April 4, 2025 |
| Last Seen: | July 6, 2026 |
| OS(es) Affected: | Windows |
The detection of Backdoor.Quasar.BB on your system indicates a potential security threat that requires immediate attention. This detection name suggests a backdoor threat, which is a type of malware that allows unauthorized access to a computer system. In this report, we will provide an overview of what Backdoor.Quasar.BB is, how it operates, the symptoms of infection, and the steps you can take to remove it from your system.
Table of Contents
What Is Backdoor.Quasar.BB?
A backdoor is a type of malware that creates a secret entrance to a computer system, allowing an attacker to access the system without being detected. Backdoors can be used to steal sensitive information, install additional malware, or take control of the system. The name Backdoor.Quasar.BB does not provide specific information about the malware family or its origins, but it suggests that it is a backdoor threat that can potentially cause harm to your system.
How Backdoor.Quasar.BB Operates
Backdoor malware, including Backdoor.Quasar.BB, typically operates by creating a connection between the infected system and a command and control (C2) server. This connection allows the attacker to send commands to the infected system, steal sensitive information, or install additional malware. Backdoors can be spread through various means, including phishing emails, infected software downloads, or exploited vulnerabilities. Once installed, the backdoor can remain hidden on the system, making it difficult to detect and remove.
Symptoms of Infection
The symptoms of a backdoor infection can be subtle, but they may include unusual system behavior, such as slow performance, unexpected crashes, or unfamiliar programs running in the background. You may also notice that your system is connecting to unfamiliar servers or that your sensitive information is being stolen. However, in many cases, backdoor infections can remain hidden, making it essential to use antivirus software and regularly scan your system for potential threats.
How to Remove Backdoor.Quasar.BB
- Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow you to download and install removal tools.
- Use a reputable antivirus tool, such as SpyHunter, to perform a full scan of your system and detect any malware, including Backdoor.Quasar.BB.
- Uninstall any suspicious programs or applications that may be related to the backdoor infection.
- Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or settings.
- Reboot your system and perform another scan with your antivirus tool to ensure that the malware has been completely removed.
Conclusion
The detection of Backdoor.Quasar.BB on your system is a serious security threat that requires immediate attention. By understanding how backdoor malware operates and taking the necessary steps to remove it, you can protect your system and sensitive information from potential harm. Remember to always use reputable antivirus software, regularly scan your system for potential threats, and practice safe computing habits to minimize the risk of infection. If you are unsure about how to remove Backdoor.Quasar.BB or if you need additional assistance, consider consulting with a cybersecurity professional or seeking help from a trusted security resource.
Analysis Report
General information
| Family Name: | Backdoor.Quasar.BB |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
7b47639530528a9f06cbea830b31f62d
SHA1:
fec342f4705a1f4751230dab741c3e27208c71b8
SHA256:
87DA853EEAEF7E7B360930E878FD8BAAFB681E0A969F2F84C9483C498501080F
File Size:
992.26 KB, 992256 bytes
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MD5:
0d1e20c4d40f8fbb8570d8610c18b7c5
SHA1:
066dde1a5c03ed8898a42a495b5a623c69b4b96e
SHA256:
64BFB8E28F421328D917945E6F69E0F0CC66138FEBEEC2DB9FFBBCEFCE1D6064
File Size:
1.76 MB, 1763880 bytes
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MD5:
07f8ae61faaf6e076cdaeee6ef71c729
SHA1:
2fabc0d3a656fbc2f2c01458f20d1511e89294d8
SHA256:
3ECF1FCC7AC7AA26030D6269C4299CF4FC135DAA62D8FF6A70A16FC83449A07F
File Size:
708.10 KB, 708096 bytes
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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 has TLS information
- File is 64-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
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- IMAGE_FILE_DLL is not set inside PE header (Executable)
- IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)
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 | Microsoft Corporation |
| File Description |
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| File Version |
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| Internal Name |
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| Legal Copyright | © Microsoft Corporation. All rights reserved. |
| Original Filename |
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| Product Name |
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| Product Version |
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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 |
|---|---|---|
| NVIDIA Corporation | DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1 | Hash Mismatch |
File Traits
- 2+ executable sections
- HighEntropy
- x64
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: | 2,675 |
|---|---|
| Potentially Malicious Blocks: | 1,070 |
| Whitelisted Blocks: | 1,391 |
| Unknown Blocks: | 214 |
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.- CobaltStrike.SVA
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 |
|---|---|
| Syscall Use |
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