Threat Database Backdoors Backdoor.MSIL.Agent.SKV

Backdoor.MSIL.Agent.SKV

By CagedTech in Backdoors

Threat Scorecard

Threat Level: 60 % (Medium)
Infected Computers: 5
First Seen: June 22, 2025
Last Seen: August 17, 2025
OS(es) Affected: Windows

The detection of Backdoor.MSIL.Agent.SKV on your system indicates a potential security threat that requires immediate attention. This backdoor threat can compromise your system's security and allow unauthorized access to your data. It is essential to understand the nature of this threat and take prompt action to remove it and prevent future infections.

What Is Backdoor.MSIL.Agent.SKV?

Backdoor.MSIL.Agent.SKV is a type of malware that allows attackers to remotely access and control an infected system. The term "backdoor" refers to the malware's ability to bypass normal security mechanisms and create a secret entry point into the system. This can enable attackers to steal sensitive information, install additional malware, or use the infected system for malicious activities.

How Backdoor.MSIL.Agent.SKV Operates

Backdoor.MSIL.Agent.SKV operates by exploiting vulnerabilities in the system or using social engineering tactics to trick users into installing the malware. Once installed, the malware can communicate with its command and control server to receive instructions and transmit stolen data. It can also hide its presence by disguising itself as a legitimate program or process, making it challenging to detect and remove.

Symptoms of Infection

Systems infected with Backdoor.MSIL.Agent.SKV may exhibit various symptoms, including unusual network activity, slow system performance, and unexplained changes to system settings. Users may also notice unfamiliar programs or processes running on their system, or receive unexpected pop-ups or alerts. However, some infections may not display any noticeable symptoms, making it essential to use anti-malware tools to detect and remove the threat.

  • Unusual network activity or connections
  • Slow system performance or crashes
  • Unexplained changes to system settings or files
  • Unfamiliar programs or processes running on the system
  • Unexpected pop-ups or alerts

How to Remove Backdoor.MSIL.Agent.SKV

  1. Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow for easier removal.
  2. Use a reputable anti-malware tool, such as SpyHunter, to perform a full scan of your system and 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 scan with your anti-malware tool to ensure that the threat has been completely removed.

Conclusion

Removing Backdoor.MSIL.Agent.SKV requires a combination of technical expertise and caution. By following the steps outlined above and using reputable anti-malware tools, you can help ensure the removal of this threat and prevent future infections. It is essential to remain vigilant and take proactive measures to protect your system and data from malware threats. Regularly updating your operating system, software, and security tools can help prevent infections, and using strong passwords and enabling two-factor authentication can add an extra layer of security to your online activities.

Analysis Report

General information

Family Name: Backdoor.MSIL.Agent.SKV
Signature status: No Signature

Known Samples

MD5: ce22f536e8f05bc418be27e1bcb4abd5
SHA1: 2b45c6c65632a207f8b8c2fe9e45ed8d5d009287
File Size: 15.36 KB, 15360 bytes
MD5: d52a04c8b27779a6cf72144ce5d98c33
SHA1: a5167ab3657dfa2c9a0788f3fa2ba098efa40f2d
File Size: 20.48 KB, 20480 bytes
MD5: 912fcbf5d71d2fe02d1e826049efdf54
SHA1: 7d2a0ba277ce537d9dc2a53c72b418a24edee1de
File Size: 14.85 KB, 14848 bytes
MD5: 3e003714323bcad874f7e9961ef49212
SHA1: d0ef993bbb6537a093947e9c78938edf2d6d9d0b
SHA256: 822BDB13CC5F01814D8EA04BD77365C082E967651BBD3E049475270EF33A81EF
File Size: 20.99 KB, 20992 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • 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)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

Windows PE Version Information

Name Value
Assembly Version 1.0.0.0
Comments
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  • Flexible module that monitors your processes. Flexible AI that optimizes your processes. Cutting-edge AI that integrates your analytics. Flexible module that monitors your processes. Flexible AI that optimizes your processes. Cutting-edge AI that integrates your analytics. Flexible module that monitors your processes. Flexible AI that optimizes your processes. Cutting-edge AI that integrates your analytics. Flexible module that monitors your processes. Flexible AI that optimizes your processes. Cutting-edge AI that integrates your analytics.
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Company Name
  • Highflier
  • Klass
  • Morley
  • Sourced
File Description
  • Accomodation
  • Dorie
  • Fatigues
  • Waisted
File Version 1.0.0.0
Internal Name
  • Highflier.exe
  • Klass.exe
  • Morley.exe
  • Sourced.exe
Legal Copyright Copyright © 2025
Original Filename
  • Highflier.exe
  • Klass.exe
  • Morley.exe
  • Sourced.exe
Product Name
  • Accomodation
  • Dorie
  • Fatigues
  • Waisted
Product Version 1.0.0.0

File Traits

  • .NET
  • x86

Block Information

Total Blocks: 61
Potentially Malicious Blocks: 18
Whitelisted Blocks: 37
Unknown Blocks: 6

Visual Map

0 0 x ? x 0 x ? 0 0 0 0 0 x 0 0 0 ? 0 x 0 0 0 x x 0 0 0 0 x 0 0 0 x x 0 0 0 0 x 0 0 ? 0 x 0 0 0 0 x 0 x 0 x x x x ? 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
Show More
  • 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!NtWaitForAlertByThreadId
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWorkerFactoryWorkerReady
  • ntdll.dll!NtWriteFile
  • UNKNOWN
User Data Access
  • GetComputerNameEx
  • GetUserDefaultLocaleName
  • GetUserObjectInformation

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