Trojan.Agent.LKGG
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: | 27,337 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 1 |
| First Seen: | June 13, 2026 |
| Last Seen: | June 23, 2026 |
| OS(es) Affected: | Windows |
Security researchers have issued advisories regarding a stealthy threat detected as Trojan.Agent.LKGG. Classified as a generic Trojan detection, this threat represents a significant risk to system integrity and user privacy. Like many threats in this category, it is designed to infiltrate Windows systems silently, establish a persistent foothold, and facilitate unauthorized activities. Because it often masks its presence behind seemingly legitimate processes, users may remain unaware of the infection for extended periods. This removal report outlines the fundamental characteristics of Trojan.Agent.LKGG, its general behavior, and the recommended steps for complete eradication.
Table of Contents
What Is Trojan.Agent.LKGG?
Trojan.Agent.LKGG is a detection name used to identify a malicious Windows PE executable. Threats of this nature are typically designed to act as a backdoor or a delivery mechanism for additional malicious payloads. Analysis of the file structure reveals that the executable carries a self-signed signature. While a legitimate digital signature is generally used to verify the publisher and ensure the file has not been tampered with, a self-signed status indicates that the certificate was generated by the developer rather than a trusted certificate authority. This is a common evasion tactic used to make the file appear more legitimate to the operating system and bypass basic security warnings, while still avoiding standard identity verification protocols.
How Trojan.Agent.LKGG Operates
Once executed on a target system, Trojan.Agent.LKGG generally follows the behavioral patterns of a standard Windows Trojan. Upon execution, the PE file may attempt to write its components to hidden or system directories to avoid detection by the casual user. It often modifies system configurations to establish persistence, ensuring that it is launched automatically every time the operating system starts. By utilizing its self-signed status, the threat attempts to blend into normal system operations. Once established, it may attempt to communicate with remote servers to receive commands, download additional malicious modules, or transmit sensitive information gathered from the compromised host.
Symptoms of Infection
Because Trojan.Agent.LKGG is designed to operate quietly, there are rarely obvious visual symptoms. However, users may observe several indirect signs of compromise:
- Unexpected degradation in system performance or frequent system freezes.
- Unexplained network activity, particularly when the computer is idle.
- Disabled or modified security software, including firewalls and antivirus programs.
- The sudden appearance of unfamiliar processes running in the Windows Task Manager.
- System crashes or instability caused by the Trojan interfering with critical system processes.
How to Remove Trojan.Agent.LKGG
Removing Trojan.Agent.LKGG requires a systematic approach to ensure that all malicious components and registry modifications are completely eliminated. Follow these steps to restore your system:
- Boot your computer into Safe Mode with Networking to prevent the Trojan from loading automatically and to limit its ability to interfere with the removal process.
- Run a full system scan with a reputable anti-malware tool such as SpyHunter to detect and quarantine the malicious PE executable and any associated files.
- Uninstall suspicious or unrecognized programs from the Windows Control Panel that may have been installed alongside the threat.
- Reset your web browsers (Chrome, Firefox, and Edge) to default settings to remove any malicious extensions, altered proxy settings, or unauthorized homepage modifications.
- Reboot your computer normally and perform a final re-scan with your anti-malware software to confirm that Trojan.Agent.LKGG has been completely removed.
Conclusion
Trojan.Agent.LKGG is a serious threat that leverages a self-signed Windows PE executable to infiltrate systems and maintain persistence. Its ability to operate silently makes it a danger to both personal and professional computing environments. Prompt detection and thorough removal are essential to prevent data loss and further system compromise. By utilizing a robust anti-malware solution and following the recommended removal protocol, users can effectively neutralize the threat and restore their system to a secure state.
Analysis Report
General information
| Family Name: | Trojan.Agent.LKGG |
|---|---|
| Signature status: | Self Signed |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
cfb338926bea158ee4fcec4ee691d001
SHA1:
1714e61eb03ebe5299f08dcdeeb6317238dd2a9e
SHA256:
B3780535DBE32D92A86EA5E4B572C75E4CFA4EA898A347F8888B00255C5DF1D9
File Size:
131.07 KB, 131072 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have debug information
- File has exports table
- 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
- 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)
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 | Riverstone Gate Digital GmbH |
| File Description | Shows and manages color thumbnail maker on the desktop |
| File Version | 12.13.932.171 |
| Legal Copyright | (c) 2026 Riverstone Gate Digital GmbH. All rights reserved. |
| Original Filename | ColorThumbnailMaker.exe |
| Product Name | Color Thumbnail Maker |
| Special Build | Stable |
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 |
|---|---|---|
| Color Thumbnail Maker | Color Thumbnail Maker | Self Signed |
| Color Thumbnail Maker | Color Thumbnail Maker | Self Signed |
File Traits
- dll
- 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: | 61 |
|---|---|
| Potentially Malicious Blocks: | 14 |
| Whitelisted Blocks: | 47 |
| 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.- Agent.LKGH
- Dropper.NFA
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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