Threat Database Backdoors Backdoor.MSIL.Spy.Agent.TCN

Backdoor.MSIL.Spy.Agent.TCN

By CagedTech in Backdoors

Threat Scorecard

Threat Level: 60 % (Medium)
Infected Computers: 3
First Seen: December 17, 2023
Last Seen: January 29, 2026
OS(es) Affected: Windows

The detection of Backdoor.MSIL.Spy.Agent.TCN on your system indicates a serious security threat that requires immediate attention. This backdoor threat can compromise your system's security and potentially lead to unauthorized access, data theft, and other malicious activities. It is essential to understand the nature of this threat and take prompt action to remove it from your system.

What Is Backdoor.MSIL.Spy.Agent.TCN?

Backdoor.MSIL.Spy.Agent.TCN is a type of malware that allows unauthorized access to your system, enabling attackers to remotely control your computer, steal sensitive information, and perform other malicious activities. The name itself suggests that it is a backdoor threat, which is a type of malware that bypasses normal security mechanisms to gain access to a system. The "MSIL" part of the name may indicate that the malware is written in Microsoft Intermediate Language, which is a platform-agnostic intermediate representation of the .NET Common Intermediate Language.

How Backdoor.MSIL.Spy.Agent.TCN Operates

Backdoor.MSIL.Spy.Agent.TCN operates by creating a covert communication channel between your system and a command and control server controlled by the attackers. This channel allows the attackers to send commands to your system, steal sensitive information, and upload additional malware. The malware may also be designed to evade detection by traditional antivirus software, making it challenging to detect and remove.

Symptoms of Infection

The symptoms of a Backdoor.MSIL.Spy.Agent.TCN infection can be subtle, but they may include unusual system behavior, such as slow performance, unexpected crashes, or unfamiliar programs running in the background. You may also notice suspicious network activity, such as unusual outgoing connections or data transfers. In some cases, the malware may also create fake system alerts or warnings to trick you into installing additional malware or revealing sensitive information.

How to Remove Backdoor.MSIL.Spy.Agent.TCN

  1. Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow you to download and install removal tools.
  2. Download and install a reputable anti-malware tool, such as SpyHunter, and perform a full scan of your system to detect and remove the malware.
  3. Uninstall any suspicious programs or applications that may be related to the malware.
  4. Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or add-ons.
  5. Reboot your system and perform another full scan with the anti-malware tool to ensure that the malware has been completely removed.

Conclusion

Removing Backdoor.MSIL.Spy.Agent.TCN from your system requires careful attention to detail and a thorough understanding of the malware's behavior. By following the steps outlined above, you can help ensure that your system is free from this malicious threat. However, it is essential to remain vigilant and continue to monitor your system for any signs of suspicious activity. Regularly updating your operating system, software, and security tools can help prevent similar infections in the future. Additionally, being cautious when opening email attachments, clicking on links, or installing software from unknown sources can also help reduce the risk of malware infections.

Analysis Report

General information

Family Name: Backdoor.MSIL.Spy.Agent.TCN
Signature status: No Signature

Known Samples

MD5: 8b0cffbe03fa42e0405161997bd1e660
SHA1: cca34e1061c9e3ec6da2aa25a6edd5e1534e4e02
SHA256: 0D1F6307C72B01363CAC0A4E89011AB977604038B779CE776A65195C404BE871
File Size: 137.73 KB, 137728 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 resources
  • File doesn't have security information
  • File is .NET application
  • File is 32-bit executable
  • File is console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
  • File is either console or GUI application
  • File is not packed
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  • IMAGE_FILE_DLL is not set inside PE header (Executable)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Traits

  • .NET
  • No Version Info
  • x86

Block Information

Total Blocks: 281
Potentially Malicious Blocks: 32
Whitelisted Blocks: 249
Unknown Blocks: 0

Visual Map

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

Similar Families

  • MSIL.Spy.Agent.TCN
  • MSIL.Spy.Agent.TCP
  • MSIL.Spy.Agent.TCV
  • MSIL.Spy.Agent.VCA

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtClearEvent
  • ntdll.dll!NtClose
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateMutant
  • ntdll.dll!NtCreatePrivateNamespace
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateThreadEx
  • ntdll.dll!NtDeviceIoControlFile
  • ntdll.dll!NtDuplicateObject
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  • 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!NtQueryWnfStateData
  • ntdll.dll!NtReadFile
  • ntdll.dll!NtReadRequestData
  • ntdll.dll!NtReleaseMutant
  • ntdll.dll!NtReleaseWorkerFactoryWorker
  • ntdll.dll!NtResumeThread
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationKey
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtSubscribeWnfStateChange
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtUnmapViewOfSectionEx
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWorkerFactoryWorkerReady
  • ntdll.dll!NtWriteFile
  • UNKNOWN
User Data Access
  • GetComputerNameEx
  • GetUserDefaultLocaleName
  • GetUserObjectInformation

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