Trojan.MSIL.Downloader.Agent.HAS

The detection of Trojan.MSIL.Downloader.Agent.HAS 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 malware that disguises itself as legitimate software. Trojans can have various functions, including downloading additional malware, stealing sensitive information, or providing unauthorized access to the infected system.

What Is Trojan.MSIL.Downloader.Agent.HAS?

Trojan.MSIL.Downloader.Agent.HAS is a type of malware that, as the name suggests, is likely designed to download additional malicious components from the internet. The "MSIL" part of the name refers to Microsoft Intermediate Language, which is a component of the .NET Framework. This suggests that the malware is written in a .NET language and is designed to run on Windows systems. The fact that it's classified as a "Downloader" implies its primary function is to fetch and install more malware or malicious tools from the internet, potentially leading to a wider range of malicious activities on the infected system.

How Trojan.MSIL.Downloader.Agent.HAS Operates

Malware like Trojan.MSIL.Downloader.Agent.HAS typically operates by first gaining access to a system, often through deception, such as disguising itself as a legitimate program or attachment. Once installed, it can begin downloading additional malware components. These components can vary widely in their functions, from keyloggers and ransomware to spyware and botnet software. The malware may communicate with its command and control servers to receive instructions or upload stolen data. Its ability to download and install additional malware makes it particularly dangerous, as it can lead to a significant escalation of the attack's severity.

Symptoms of Infection

Symptoms of infection can vary, but common signs include unexpected changes in system performance, such as slowdowns, increased CPU usage without apparent reason, or unusual network activity. You might also notice new, unfamiliar programs or icons on your desktop, unexpected pop-ups, or changes in your web browser's behavior, such as altered home pages or search engines. In some cases, the infection might not display overt symptoms, making it difficult to detect without the use of security software.

How to Remove Trojan.MSIL.Downloader.Agent.HAS

1. Boot your computer in Safe Mode with Networking to limit the malware's ability to interfere with the removal process.
2. Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter, to detect and remove all traces of the malware.
3. Uninstall any recently installed or suspicious programs that you do not recognize or need.
4. Reset your web browsers (Chrome, Firefox, Edge, etc.) to their default settings to remove any malicious extensions or settings changes made by the malware.
5. Reboot your computer and perform another full scan with your anti-malware tool to ensure that all components of the malware have been removed.

Conclusion

Removing Trojan.MSIL.Downloader.Agent.HAS requires careful and thorough steps to ensure that all malicious components are eliminated from your system. It's crucial to use reputable security software and follow best practices for system hygiene, including keeping your operating system and software up to date, avoiding suspicious downloads, and using strong, unique passwords. Regularly scanning your system for malware and being cautious with emails and attachments can also help prevent future infections. By understanding how malware operates and taking proactive steps, you can significantly reduce the risk of your system being compromised by threats like Trojan.MSIL.Downloader.Agent.HAS.

Analysis Report

General information

Family Name:	Trojan.MSIL.Downloader.Agent.HAS
Signature status:	No Signature

Known Samples

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Known Samples

This section lists other file samples believed to be associated with this family.

MD5: f8bd02739d4f356b881a80c2dd1ad3a2 SHA1: 21ade1c0fef71eda6f12ba1c6571f1ad322d651c SHA256: 41101CC22757DA147846D49484536D8CEEDABEFA6DC0DD19A01057AAC8BFA3AA File Size: 15.87 KB, 15872 bytes

Windows Portable Executable Attributes

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Windows Portable Executable Attributes

This section lists file attributes found within family samples. These attributes are extracted from the files’ Windows PE (Portable Executable) specification and various system flags. Portable Executable Attributes give malware researchers insight into a file’s functionality, executable details, platform and runtime environment.

• File doesn't have "Rich" header
• File doesn't have debug information
• File doesn't have exports table
• File doesn't have security information
• File is .NET application
• File is 32-bit executable
• File is either console or GUI application
• File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
• 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)

File Icons

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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

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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	0.0.0.0
File Version	0.0.0.0
Internal Name	FETSync2.exe
Original Filename	FETSync2.exe
Product Version	0.0.0.0

File Traits

• .NET
• HighEntropy
• x86

Block Information

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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
Potentially Malicious Blocks:	1
Whitelisted Blocks:	0
Unknown Blocks:	0

Visual Map

x

0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

Similar Families

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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.

• MSIL.Downloader.Agent.HAS
• MSIL.Downloader.Agent.HTE
• MSIL.Downloader.Agent.HTF
• MSIL.Downloader.Agent.TH

Windows API Usage

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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	ntdll.dll!NtAlpcSendWaitReceivePort ntdll.dll!NtClearEvent ntdll.dll!NtClose ntdll.dll!NtCreateEvent ntdll.dll!NtCreateFile ntdll.dll!NtCreateMutant ntdll.dll!NtCreatePrivateNamespace ntdll.dll!NtCreateSection ntdll.dll!NtCreateSemaphore ntdll.dll!NtCreateThreadEx Show More ntdll.dll!NtDuplicateObject ntdll.dll!NtEnumerateKey ntdll.dll!NtEnumerateValueKey ntdll.dll!NtFreeVirtualMemory ntdll.dll!NtMapViewOfSection ntdll.dll!NtOpenDirectoryObject ntdll.dll!NtOpenEvent ntdll.dll!NtOpenFile ntdll.dll!NtOpenKey ntdll.dll!NtOpenKeyEx ntdll.dll!NtOpenProcess ntdll.dll!NtOpenProcessToken ntdll.dll!NtOpenThreadToken ntdll.dll!NtProtectVirtualMemory ntdll.dll!NtQueryAttributesFile ntdll.dll!NtQueryDefaultLocale ntdll.dll!NtQueryDirectoryFileEx ntdll.dll!NtQueryFullAttributesFile ntdll.dll!NtQueryInformationFile ntdll.dll!NtQueryInformationJobObject ntdll.dll!NtQueryInformationProcess ntdll.dll!NtQueryInformationThread ntdll.dll!NtQueryInformationToken ntdll.dll!NtQueryKey ntdll.dll!NtQueryLicenseValue ntdll.dll!NtQueryPerformanceCounter ntdll.dll!NtQuerySecurityAttributesToken ntdll.dll!NtQuerySecurityObject ntdll.dll!NtQuerySystemInformation ntdll.dll!NtQuerySystemInformationEx ntdll.dll!NtQueryValueKey ntdll.dll!NtQueryVirtualMemory ntdll.dll!NtQueryVolumeInformationFile ntdll.dll!NtReadFile ntdll.dll!NtReleaseMutant ntdll.dll!NtReleaseWorkerFactoryWorker ntdll.dll!NtResumeThread ntdll.dll!NtSetEvent ntdll.dll!NtSetInformationFile ntdll.dll!NtSetInformationKey ntdll.dll!NtSetInformationProcess ntdll.dll!NtSetInformationThread ntdll.dll!NtSetInformationWorkerFactory ntdll.dll!NtSubscribeWnfStateChange ntdll.dll!NtTestAlert ntdll.dll!NtTraceControl ntdll.dll!NtUnmapViewOfSection ntdll.dll!NtUnmapViewOfSectionEx ntdll.dll!NtWaitForAlertByThreadId ntdll.dll!NtWaitForMultipleObjects ntdll.dll!NtWaitForSingleObject ntdll.dll!NtWaitForWorkViaWorkerFactory ntdll.dll!NtWriteFile ntdll.dll!NtYieldExecution UNKNOWN
User Data Access	GetComputerNameEx GetUserDefaultLocaleName GetUserObjectInformation
Anti Debug	IsDebuggerPresent
Process Shell Execute	ShellExecuteEx

Shell Command Execution

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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) FETSync2.exe @release_java_modules.txt -m b4j/com.applications.Fetsync2.main