Trojan.Agent.Gen.FQO
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: | September 18, 2026 |
| Last Seen: | October 19, 2026 |
| OS(es) Affected: | Windows |
Trojan.Agent.Gen.FQO is a Windows-based Trojan horse classified as a high-risk threat, with a danger level rating of 8 out of 10. It is designed to infiltrate a computer quietly, avoid detection, and carry out malicious instructions in the background without the user's knowledge or consent. As a generic Trojan detection, it represents a broad family of malicious programs that share similar stealth and control capabilities rather than a single, narrowly defined piece of malware.
Table of Contents
What Trojan.Agent.Gen.FQO Does
Once active on a system, Trojan.Agent.Gen.FQO runs silently in the background, often without displaying any visible windows or alerts. Analysis of the threat shows it is a 64-bit native Windows application that is not digitally signed and lacks version information, which makes it harder for users and some security tools to immediately recognize it as legitimate or suspicious. The Trojan has been observed using low-level system calls associated with memory management and file writing, as well as encryption-related functions. This combination suggests the malware may manipulate running processes, write data to disk, and protect or disguise its internal operations and any data it handles. In many cases, Trojans in this category are used to grant remote attackers a level of control over the infected machine, potentially allowing them to execute additional commands, deploy further malicious payloads, or quietly monitor system activity.
How It Usually Gets onto Computers
Trojan.Agent.Gen.FQO typically spreads through deceptive or exploit-based methods rather than obvious installation prompts. Common infection paths include downloading software from untrustworthy or malicious websites, opening email attachments from unknown or unverified senders, and exploiting unpatched system vulnerabilities or security flaws. Attachments used in these campaigns can be disguised in various file formats, including executables and files that appear to be harmless media or image files. Because the installation process is designed to be stealthy, users often have no clear indication that anything has been installed at all.
Risks for the User
The presence of this Trojan on a system poses serious risks. It may allow attackers to gain significant or even complete control over the infected computer, opening the door to data theft, unauthorized surveillance, and further malware installation. Given its use of encryption-related functions, the Trojan could be involved in hiding stolen information or securing communication with a remote attacker. Left unaddressed, such infections can lead to compromised personal data, financial loss, and degraded system performance.
Signs of Infection
Because this type of Trojan is built to operate covertly, visible symptoms may be minimal or absent. Users should still watch for warning signs typical of this threat category, such as unexpected slowdowns, unfamiliar processes running in the background, unusual network activity, security tools being disabled unexpectedly, or new and unrecognized files appearing on the system.
How to Stay Protected
To reduce the risk of infection, users should keep their operating system and all installed software fully updated to close known security vulnerabilities. Avoid downloading programs from untrusted or unofficial websites, and never open email attachments from unknown or suspicious senders, especially executable files. Maintaining up-to-date security software, performing regular system scans, and exercising caution with unsolicited downloads are essential habits for defending against Trojans like this one.
Analysis Report
General information
| Family Name: | Trojan.Agent.Gen.FQO |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
231cafecac53b54dabd313c1a0b0d4a0
SHA1:
d21001ef07c678446c5a58943dd9a1c8ef92b5c3
SHA256:
85BAB1D23360B9BCB7175DAEC2ED121F97C42B652851A797E2E88581F1173A81
File Size:
289.28 KB, 289280 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 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)
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: | 780 |
|---|---|
| Potentially Malicious Blocks: | 658 |
| Whitelisted Blocks: | 122 |
| 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.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 |
Show More
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| Encryption Used |
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