Trojan.MSIL.Agent.AY
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: | 4,946 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 1,345 |
| First Seen: | March 28, 2022 |
| Last Seen: | July 19, 2026 |
| OS(es) Affected: | Windows |
The detection of Trojan.MSIL.Agent.AY on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to compromise the security and integrity of your computer, and it is essential to understand its nature and how to remove it to prevent further damage.
Table of Contents
What Is Trojan.MSIL.Agent.AY?
Trojan.MSIL.Agent.AY is a type of Trojan horse malware that can infiltrate your system without your knowledge or consent. The name "Trojan" refers to the method of infection, where the malware disguises itself as a legitimate program or file to gain access to your computer. The ".MSIL" part of the name suggests that the malware is written in Microsoft Intermediate Language, which is a platform-independent instruction set used by the .NET Framework. The "Agent.AY" part of the name is a unique identifier assigned by the security software that detected the threat.
How Trojan.MSIL.Agent.AY Operates
Once Trojan.MSIL.Agent.AY infects your system, it can perform a variety of malicious activities, such as stealing sensitive information, downloading additional malware, or providing unauthorized access to your computer. The malware can also modify system settings, disable security software, and create backdoors to allow remote access to your computer. The exact behavior of Trojan.MSIL.Agent.AY depends on its intended purpose and the goals of its creators.
Symptoms of Infection
The symptoms of a Trojan.MSIL.Agent.AY infection can vary, but common signs include slow system performance, unexpected pop-ups or ads, and unusual network activity. You may also notice that your computer is behaving erratically, such as crashing or freezing frequently. In some cases, you may not notice any symptoms at all, which is why regular malware scans are essential for detecting and removing threats like Trojan.MSIL.Agent.AY.
How to Remove Trojan.MSIL.Agent.AY
- Boot your computer in Safe Mode with Networking to prevent the malware from loading and to allow you to download and install removal tools.
- Download and install a reputable anti-malware tool, such as SpyHunter, and perform a full scan of your system to detect and remove Trojan.MSIL.Agent.AY and any related malware.
- Uninstall any suspicious programs or applications that may be related to the infection.
- Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or add-ons.
- Reboot your computer and perform another full scan with your anti-malware tool to ensure that the threat has been completely removed.
Conclusion
Removing Trojan.MSIL.Agent.AY from your system requires a combination of technical knowledge and the right tools. By following the steps outlined above, you can help ensure that your computer is free from this malware and prevent future infections. Remember to always be cautious when downloading software or files from the internet, and never click on suspicious links or attachments. Regular malware scans and updates to your operating system and security software can also help protect your computer from threats like Trojan.MSIL.Agent.AY.
Analysis Report
General information
| Family Name: | Trojan.MSIL.Agent.AY |
|---|---|
| Signature status: | No Signature |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
e314803cf6030040a6bbe5b5f31cb723
SHA1:
a05b0700bbbf19cd3f64833790aee8d20d03ebdb
SHA256:
82D5DCE0652677A7244D437B1CFA9603960A9D4549D6CF2E57DBA6B48A5098AB
File Size:
1.08 MB, 1075416 bytes
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MD5:
c7445657888041b2321243cd8dc1c230
SHA1:
8e7beb106e6c2ad8a7572aae29501452520cf47a
SHA256:
806C6B8EB3E1E2538123215A874F9AC8A4AF3AF7EA6B2B6CCBA2C3FA0C9E8937
File Size:
409.60 KB, 409600 bytes
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MD5:
dc9892944373eaa08e486efa749c96ea
SHA1:
0f94c736ced07d75ef61b183c00637e581130796
SHA256:
0F752CCC799CEF0E5EC0D400238B35444432825F8147F4EE6FD10A19F265FC2B
File Size:
1.86 MB, 1863680 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 relocations information
- File doesn't have security information
- File has exports table
- File is .NET application
- File is 32-bit executable
- File is console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
- File is either console or GUI application
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- 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)
- IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)
File Icons
File Icons
This section displays icon resources found within family samples. Malware often replicates icons commonly associated with legitimate software to mislead users into believing the malware is safe.
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 |
|---|---|
| Assembly Version | 1.0.0.0 |
| File Description |
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| File Version | 1.0.0.0 |
| Internal Name |
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| Legal Copyright |
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| Original Filename |
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| Product Name |
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| Product Version | 1.0.0.0 |
File Traits
- .NET
- dll
- HighEntropy
- Installer Version
- RijndaelManaged
- x86
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: | 1,237 |
|---|---|
| Potentially Malicious Blocks: | 929 |
| Whitelisted Blocks: | 308 |
| 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.- Crack.K
- MSIL.Agent.AY
- MSIL.Filecoder.JT
- Trojan.Agent.Gen.DE
Files Modified
Files Modified
This section lists files that were created, modified, moved and/or deleted by samples in this family. File system activity can provide valuable insight into how malware functions on the operating system.| File | Attributes |
|---|---|
| c:\users\user\appdata\local\temp\__tmp_rar_sfx_access_check_12928546 | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\temp\datos.zip | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\temp\datos.zip | Synchronize,Write Attributes |
| c:\users\user\appdata\local\temp\instserv.exe | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\temp\instserv.exe | Synchronize,Write Attributes |
| c:\users\user\appdata\local\temp\interop.iwshruntimelibrary.dll | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\temp\interop.iwshruntimelibrary.dll | Synchronize,Write Attributes |
| c:\users\user\appdata\local\temp\zipforge.dll | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\local\temp\zipforge.dll | Synchronize,Write Attributes |
Registry Modifications
Registry Modifications
This section lists registry keys and values that were created, modified and/or deleted by samples in this family. Windows Registry activity can provide valuable insight into malware functionality. Additionally, malware often creates registry values to allow itself to automatically start and indefinitely persist after an initial infection has compromised the system.| Key::Value | Data | API Name |
|---|---|---|
| HKCU\software\winrar sfx::c%%users%nqqwamjbc:\users\user\appdata\roaminglocal%temp | C:\Users\Nqqwamjb\AppData\Local\Temp | RegNtPreCreateKey |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect | RegNtPreCreateKey | |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 | � xy �ރ ee Vs} kP~ ��1 �� e e�� � ��1 �� i e�� r > � v e�� | RegNtPreCreateKey |
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| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 | �i ) +� xy ��Bx #@�#��$¨1HO 9�@V� @��g��rnJ u�~ y�^�� �P� �ރ �����|��7�b:��� ����a ������ [�m� Ù� ��p�'��IV �gi�t� �� �$�` �(!��o ��j A� B�� `�V�P� ��� �zH�Q] �� @ K� A *�" B 'i | RegNtPreCreateKey |
| HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 | �i + +� xy ��Bx #@�#��$¨1HO 9�@V� @��N� g��rnJ u�~ y�9 y�^�� �P� �ރ �����|��7�b:��� ����a ������ [�m� Ù� ��p�'��IV �gi�t� �� �$�` �(!��o ��j A� B�� `�V�P� ��� �zH�Q] �� @ K� A *�" | RegNtPreCreateKey |
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 |
|---|---|
| Keyboard Access |
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| Process Manipulation Evasion |
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| Process Shell Execute |
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| User Data Access |
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| Anti Debug |
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| Syscall Use |
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Shell Command Execution
Shell Command Execution
This section lists Windows shell commands that are run by the samples in this family. Windows Shell commands are often leveraged by malware for nefarious purposes and can be used to elevate security privileges, download and launch other malware, exploit vulnerabilities, collect and exfiltrate data, and hide malicious activity.
(NULL) C:\Users\Nqqwamjb\AppData\Local\Temp\InstServ.exe
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