Trojan.Dropper.Agent.QB
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: | 1 |
| First Seen: | June 20, 2025 |
| Last Seen: | January 15, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.Dropper.Agent.QB on your system indicates a potential security threat that requires immediate attention. This detection name suggests a type of malware that can drop or install additional malicious components on an infected computer. Understanding the nature of this threat and taking prompt action to remove it is crucial to protect your system and data from further harm.
Table of Contents
What Is Trojan.Dropper.Agent.QB?
Trojan.Dropper.Agent.QB is identified as a Trojan-type threat, which typically means it is designed to allow unauthorized access to a computer system or to disrupt its operation. Trojans are known for their ability to disguise themselves as legitimate software, making them difficult to detect without proper security tools. The "Dropper" part of the name implies that this malware can download and install other malicious programs, potentially leading to a broader range of malicious activities on the infected system.
How Trojan.Dropper.Agent.QB Operates
The operation of Trojan.Dropper.Agent.QB, like many Trojans, likely involves exploiting vulnerabilities in software or tricking users into executing the malware. Once installed, it can communicate with its command and control servers to receive instructions, which might include downloading additional malware, stealing sensitive information, or using the infected computer for malicious activities such as spamming or participating in distributed denial-of-service (DDoS) attacks. The exact mechanisms can vary, but the end goal is typically to compromise the security and integrity of the infected system for financial gain or other malicious purposes.
Symptoms of Infection
Symptoms of a Trojan.Dropper.Agent.QB infection can be subtle and may not always be immediately apparent. Common indicators of a Trojan infection include unexpected changes to system settings, unusual network activity, slow system performance, and the appearance of unwanted programs or pop-ups. In some cases, the malware may operate without noticeable symptoms, making regular security scans essential for detection.
- Unexplained changes in system settings or performance
- Appearance of unwanted software or toolbars
- Increased network activity without a clear cause
- Frequent pop-ups or unwanted advertisements
How to Remove Trojan.Dropper.Agent.QB
- 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 components of the Trojan.
- Uninstall any suspicious programs that were installed around the time of the infection. Be cautious and only remove programs you are certain are malicious or unnecessary.
- Reset your web browsers (Chrome, Firefox, Edge, etc.) to their default settings to remove any malicious extensions or settings changes made by the Trojan.
- Reboot your computer and perform another full scan with your anti-malware tool to ensure all components of the Trojan have been removed.
Conclusion
The removal of Trojan.Dropper.Agent.QB requires careful and immediate action to prevent further damage to your system and data. By understanding the nature of this threat and following the steps outlined for removal, you can help protect your computer from the potential harm caused by this and other malware. Regularly updating your operating system, using reputable security software, and practicing safe computing habits are key to preventing future infections and maintaining the security and integrity of your computer system.
Analysis Report
General information
| Family Name: | Trojan.Dropper.Agent.QB |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
178c26ebfb66731a16bf5051ecd08ed7
SHA1:
62340d639ca0bbd47fbd116f54a10b6e798c7763
SHA256:
620CE6D7F4E70E824476EDB3109E2459C7D5822931DD282DDB25219C342063A0
File Size:
80.90 KB, 80896 bytes
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MD5:
e65263167838c9868952a68672d82ef4
SHA1:
156d90b09bc861e0134acba9c72708d9ff0cf523
SHA256:
E73FCF8E0AD1BD0AE30FBCD63EAE71852C3806C939993728AA33FF7225A902AE
File Size:
105.47 KB, 105472 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 resources
- 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)
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- 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 Traits
- No Version Info
- 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: | 455 |
|---|---|
| Potentially Malicious Blocks: | 294 |
| Whitelisted Blocks: | 161 |
| 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.- AdaptixC2.A
- Agent.GJT
- CobaltStrike.SO
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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