Trojan.Agent.VAC
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: | 20,004 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 23 |
| First Seen: | August 26, 2025 |
| Last Seen: | June 8, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.Agent.VAC indicates that a potentially malicious program has been identified on your system. This type of threat is generally categorized as a Trojan, which is a broad term for malicious software that disguises itself as legitimate. The specific characteristics and behaviors of Trojan.Agent.VAC may vary, but understanding its nature and how it operates is crucial for effective removal and prevention of future infections.
Table of Contents
What Is Trojan.Agent.VAC?
Trojan.Agent.VAC, by its name, suggests it is a type of Trojan agent. Trojans are malicious programs that can allow unauthorized access to a computer, steal data, or disrupt system operation. They often masquerade as useful software, making them difficult to detect without proper security tools. The ".VAC" part of the name could imply a specific variant or behavior, but without more context, it's essential to focus on general Trojan characteristics and removal strategies.
How Trojan.Agent.VAC Operates
Trojans like Trojan.Agent.VAC typically operate by deceiving users into installing them. This can happen through various means, including downloading software from untrusted sources, opening malicious email attachments, or clicking on links to compromised websites. Once installed, a Trojan can execute a wide range of malicious activities, from data theft and keystroke logging to providing backdoor access to hackers. The exact operation of Trojan.Agent.VAC would depend on its specific design and the intentions of its creators.
Symptoms of Infection
Identifying a Trojan infection can be challenging due to its stealthy nature. However, some common symptoms include unusual system behavior, such as slow performance, frequent crashes, or unfamiliar programs and icons. Users might also notice unexpected changes in their browser settings or the appearance of unwanted toolbars and extensions. In some cases, infections can lead to significant data loss or unauthorized financial transactions, making prompt action crucial.
How to Remove Trojan.Agent.VAC
- Enter Safe Mode with Networking: This will limit the malware's ability to interfere with the removal process. Restart your computer and press the key to access the boot menu (usually F8, F12, or Del), then select Safe Mode with Networking.
- Perform a Full Scan: Utilize a reputable anti-malware tool, such as SpyHunter, to scan your system thoroughly. Ensure the tool is updated with the latest definitions to improve detection capabilities.
- Uninstall Suspicious Programs: Go through the list of installed programs on your computer and uninstall any that seem unfamiliar or were installed around the time the infection was detected.
- Reset Your Browser: If your browser has been affected, resetting it to its default settings can help remove unwanted extensions and settings changes. This can be done for Chrome, Firefox, Edge, and other browsers through their respective settings menus.
- Reboot and Re-scan: After completing the above steps, restart your computer in normal mode and perform another full scan with your anti-malware tool to ensure that all traces of the malware have been removed.
Conclusion
Removing Trojan.Agent.VAC and preventing future infections require a combination of technical knowledge, the right tools, and cautious behavior online. By understanding how Trojans operate and following a systematic approach to removal, users can protect their systems and data from these threats. Regular updates of operating systems, software, and security tools, along with avoiding suspicious downloads and links, are key to maintaining a secure computing environment.
Analysis Report
General information
| Family Name: | Trojan.Agent.VAC |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
31051f309d6bbf65d23c8ebcca3ab6ae
SHA1:
4da883097efb8e5ad624abcf3852519c1d5e035c
SHA256:
8EDC5943A227B87B3A10B78C62667C0EC4748AC2C354E685E3CE3AF20767809D
File Size:
1.78 MB, 1777664 bytes
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MD5:
d78b7878175bb338de3536f0d3dbf528
SHA1:
49272e7ae9acb5386c791d648ea13bdf02081082
SHA256:
0412F921B749CE3B7DCB4BB8BED65D026E1C43B71235266DBF7CA3D2043DD422
File Size:
880.13 KB, 880128 bytes
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MD5:
6ec8d62bf359ae749e1d7ede7caf483c
SHA1:
62b627974775a9a69aaa00b9d7763c946d400357
SHA256:
864583BEB490C35C76A0B5DA59CB6CAB21A04DD8D578823C8046F5B6AFB04ADD
File Size:
1.56 MB, 1560576 bytes
|
Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have exports table
- File doesn't have relocations information
- 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
- 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 | Microsoft Corporation |
| File Description | AppVShNotify |
| File Version |
|
| Internal Name | AppVShNotify |
| Legal Copyright | © 2015 Microsoft Corporation. All rights reserved. |
| Legal Trademarks | Microsoft® is a registered trademark of Microsoft Corporation. |
| Original Filename | AppVShNotify.exe |
| Private Build | RTM (by sftbuild on MDOP-BLD5) |
| Product Name | Microsoft Application Virtualization (App-V) |
| Product Version |
|
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: | 688 |
|---|---|
| Potentially Malicious Blocks: | 27 |
| Whitelisted Blocks: | 660 |
| Unknown Blocks: | 1 |
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.VAC
- AutoRun.R
- Expiro.LCA
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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