Threat Database Trojans Trojan.MSIL.Agent.II

Trojan.MSIL.Agent.II

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 207
First Seen: December 27, 2021
Last Seen: November 24, 2024
OS(es) Affected: Windows

The detection of Trojan.MSIL.Agent.II indicates that a potentially malicious program has been identified on your system. This detection name suggests a type of Trojan threat, which is a broad category of malware designed to deceive users about its true intentions. Trojans can be used for a variety of malicious purposes, including data theft, espionage, and the unauthorized control of an infected computer.

What Is Trojan.MSIL.Agent.II?

Trojan.MSIL.Agent.II, as indicated by its name, falls under the category of Trojan malware. The specifics of its functionality and purpose can vary, but like other Trojans, it is likely designed to operate covertly, hiding its malicious activities from the user. The "MSIL" part of the name refers to Microsoft Intermediate Language, which is a part of the .NET Framework. This suggests that the malware might be written in a .NET language and compiled to MSIL, which can then be executed by the .NET Common Language Runtime (CLR). This does not necessarily imply a specific set of behaviors but indicates the malware's technical characteristics.

How Trojan.MSIL.Agent.II Operates

Trojan.MSIL.Agent.II, like other Trojans, is expected to operate in a way that allows it to remain undetected for as long as possible. It may use various techniques to evade detection, including disguising itself as a legitimate program, exploiting vulnerabilities in software, or using social engineering tactics to trick users into installing it. Once installed, the malware could potentially communicate with its command and control servers to receive instructions, download additional malware, or exfiltrate sensitive information from the infected system.

Symptoms of Infection

The symptoms of a Trojan.MSIL.Agent.II infection can vary widely depending on its specific payload and intentions. Common indicators of a Trojan infection include unexpected changes to system settings, unusual network activity, the appearance of unwanted programs or toolbars, and a general decline in system performance. In some cases, the infection may not exhibit noticeable symptoms, making it difficult for users to detect without the aid of security software.

How to Remove Trojan.MSIL.Agent.II

  1. Enter Safe Mode with Networking: This will help prevent the malware from loading and make it easier to remove. To do this, restart your computer and press the key to access your boot menu (this key varies by manufacturer but is often F8, F12, or Del). Select Safe Mode with Networking.
  2. Perform a Full Scan with a Reputable Tool: Use a trusted anti-malware program, such as SpyHunter, to scan your system for malware. Ensure your security software is updated before running the scan to detect the latest threats.
  3. Uninstall Suspicious Programs: Go through your list of installed programs and remove any that you do not recognize or that were installed around the time your system became infected.
  4. Reset Your Browser: If your browser (such as Chrome, Firefox, or Edge) has been affected, reset it to its default settings. This can often be done through the browser's settings menu.
  5. Reboot and Re-scan: After removing the malware and taking steps to secure your system, reboot your computer and run another scan with your anti-malware tool to ensure that all traces of the infection have been removed.

Conclusion

The removal of Trojan.MSIL.Agent.II requires careful attention to detail and the use of reputable security tools. It's essential to stay vigilant and ensure that your system and all software are kept up to date to prevent future infections. Regularly scanning your system for malware and being cautious when downloading and installing software can significantly reduce the risk of becoming infected with Trojans and other types of malware. By taking proactive steps to secure your system, you can help protect your personal data and maintain the integrity of your computer.

Analysis Report

General information

Family Name: Trojan.MSIL.Agent.II
Signature status: Self Signed

Known Samples

MD5: 55f48fb4dfb8563227c99881ed2bfaa5
SHA1: 3cce52df9eb90334c51d80bcad58ba80d775bb03
File Size: 338.69 KB, 338688 bytes
MD5: 85db3ee2a3dde54b93e2b7e87c6f86f9
SHA1: 813e8a04164df7bb6ce5cdec71d27583086e8b61
SHA256: 3A7F008514E2357D68BCB0F66CDE8894958E24A18D16525508F6E81547FC22F5
File Size: 185.34 KB, 185344 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 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)
Show More
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

Windows PE Version Information

Name Value
Assembly Version 1.0.0.0
Comments bRDhPGXwPMkWtHgHy6LrlcMupN58Z632Yv16IbW3m8AZpKeVqznMAF5X7W7xdoinbtxvM
Company Name Microsoft DirectPlay NAT Helper UPNP
File Description Microsoft UIManager Broker Proxy Stub
File Version
  • 5.6.4.3
  • 1.0.0.0
Internal Name
  • grpconv.exe
  • XWormClient.exe
Legal Copyright Copyright (C) 2012-2002 DwUBSkfUkhSZVtRMqTgzree9DfDpb7t7cQYtlzS37zrslV7vRqxuw8lw, Inc. All rights reserved.
Original Filename XWormClient.exe
Product Version
  • 5.6.4.3
  • 1.0.0.0

Digital Signatures

Signer Root Status
USA LLC USA LLC Self Signed

File Traits

  • .NET
  • GenKrypt
  • NewLateBinding
  • Reactor
  • RijndaelManaged
  • x86

Block Information

Total Blocks: 209
Potentially Malicious Blocks: 11
Whitelisted Blocks: 139
Unknown Blocks: 59

Visual Map

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

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAlertThreadByThreadId
  • 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
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  • ntdll.dll!NtCreateThreadEx
  • 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!NtOpenSection
  • 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!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtUnmapViewOfSectionEx
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWriteFile
  • UNKNOWN
User Data Access
  • GetComputerNameEx
  • GetUserDefaultLocaleName
  • GetUserObjectInformation

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