Threat Database Backdoors Backdoor.Agent.DFSJ

Backdoor.Agent.DFSJ

By CagedTech in Backdoors

Threat Scorecard

Threat Level: 60 % (Medium)
Infected Computers: 4
First Seen: April 18, 2025
Last Seen: December 30, 2025
OS(es) Affected: Windows

The detection of Backdoor.Agent.DFSJ on your system indicates a potential security threat that requires immediate attention. This backdoor threat can compromise the security and integrity of your computer, allowing unauthorized access and potentially leading to further malware infections or data breaches. It is essential to understand the nature of this threat and take prompt action to remove it and prevent future occurrences.

What Is Backdoor.Agent.DFSJ?

Backdoor.Agent.DFSJ is a type of backdoor threat that can provide unauthorized access to your computer, allowing attackers to remotely control your system, steal sensitive information, or install additional malware. Backdoor threats are particularly dangerous because they can operate stealthily, making them difficult to detect without proper security measures in place. The name Backdoor.Agent.DFSJ itself does not directly indicate a specific malware family, but rather categorizes the threat based on its backdoor characteristics and potential impact on your system.

How Backdoor.Agent.DFSJ Operates

Backdoor threats like Backdoor.Agent.DFSJ typically operate by creating a covert communication channel between your computer and a command and control server controlled by the attackers. This channel can be used to send commands to your computer, steal data, or upload additional malware. The operation of backdoor threats can be sophisticated, involving various techniques to evade detection, such as encrypting communications, using legitimate system processes to hide malicious activities, or exploiting vulnerabilities in software to gain initial access.

Symptoms of Infection

Symptoms of a Backdoor.Agent.DFSJ infection can be subtle and may not always be immediately apparent. However, common indicators of a backdoor infection include unusual network activity, slow system performance, unexpected changes to system settings, or the appearance of unfamiliar programs or files. In some cases, the presence of a backdoor may only be discovered after a thorough security scan or when other malware is detected, as backdoors are often used in conjunction with other types of threats to maximize the impact of an attack.

How to Remove Backdoor.Agent.DFSJ

  1. Boot your computer in Safe Mode with Networking to prevent the malware from loading and to allow for internet access for updates and scans.
  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 Backdoor.Agent.DFSJ and any associated malware.
  3. Uninstall any suspicious programs or applications that were installed around the time of the suspected infection, as these could be related to the backdoor threat.
  4. Reset your web browsers (Chrome, Firefox, Edge) to their default settings to remove any malicious extensions or settings that may have been altered by the malware.
  5. Reboot your computer and perform another full scan to ensure that all malware has been successfully removed and that your system is clean.

Conclusion

The removal of Backdoor.Agent.DFSJ requires careful and immediate action to prevent further damage to your system and to protect your personal data. By following the steps outlined above and maintaining good security practices, such as keeping your operating system and software up to date, using strong antivirus protection, and being cautious when opening emails or downloading files from the internet, you can significantly reduce the risk of future infections. Remember, vigilance and proactive security measures are key to protecting your digital assets in today's evolving cybersecurity landscape.

Analysis Report

General information

Family Name: Backdoor.Agent.DFSJ
Signature status: No Signature

Known Samples

MD5: 1c791f7a8249199461e8cbd1307304fc
SHA1: 806f3c1bc62beaf53c540f30b1f82746d98079fb
SHA256: 775D25D0BC3125AE6DF9A2E84CD448E2108AE7EDF6D66916E39F97E9B5CB86E2
File Size: 8.47 MB, 8467456 bytes
MD5: 4a0bc917ac65e39cf31425614d14372a
SHA1: 5d519a34a47dd45f7c7e3399ff9a83363efb1a5a
SHA256: D3D8C0EFA4C20E55E07A3266DB9F8B433E65443496BD078BF333BF0D0C2A9D20
File Size: 8.47 MB, 8467456 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 64-bit executable
  • File is console application (IMAGE_SUBSYSTEM_WINDOWS_CUI)
  • File is either console or GUI application
  • File is Native application (NOT .NET 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

  • golang
  • HighEntropy
  • No Version Info
  • Pastebin
  • x64

Block Information

Total Blocks: 12,372
Potentially Malicious Blocks: 2
Whitelisted Blocks: 12,370
Unknown Blocks: 0

Visual Map

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... Data truncated
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

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Files Modified

File Attributes
\device\namedpipe\dav rpc service Generic Read,Write Data,Write Attributes,Write extended,Append data
\device\namedpipe\pshost.134088227280110536.6480.defaultappdomain.powershell Generic Read,Write Data,Write Attributes,Write extended,Append data,LEFT 524288
\device\namedpipe\pshost.134112350846656244.7844.defaultappdomain.powershell Generic Read,Write Data,Write Attributes,Write extended,Append data,LEFT 524288
\device\namedpipe\wkssvc Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\local\microsoft\windows\powershell\startupprofiledata-noninteractive Generic Write,Read Attributes
c:\users\user\appdata\local\temp\__psscriptpolicytest_2sgbqq0a.gzv.ps1 Generic Write,Read Attributes
c:\users\user\appdata\local\temp\__psscriptpolicytest_45oe3zmj.vas.ps1 Generic Write,Read Attributes
c:\users\user\appdata\local\temp\__psscriptpolicytest_flwssxur.m0o.psm1 Generic Write,Read Attributes
c:\users\user\appdata\local\temp\__psscriptpolicytest_uiryumpl.tvv.psm1 Generic Write,Read Attributes

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAccessCheck
  • ntdll.dll!NtAlertThreadByThreadId
  • ntdll.dll!NtAllocateLocallyUniqueId
  • ntdll.dll!NtAlpcConnectPort
  • ntdll.dll!NtAlpcConnectPortEx
  • ntdll.dll!NtAlpcQueryInformation
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtAlpcSetInformation
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtAssociateWaitCompletionPacket
Show More
  • ntdll.dll!NtCancelTimer2
  • ntdll.dll!NtCancelWaitCompletionPacket
  • ntdll.dll!NtClearEvent
  • ntdll.dll!NtClose
  • ntdll.dll!NtCompareSigningLevels
  • ntdll.dll!NtConnectPort
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateFile
  • ntdll.dll!NtCreateIoCompletion
  • ntdll.dll!NtCreateKey
  • ntdll.dll!NtCreateMutant
  • ntdll.dll!NtCreatePrivateNamespace
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateSemaphore
  • ntdll.dll!NtCreateThreadEx
  • ntdll.dll!NtCreateTimer
  • ntdll.dll!NtCreateTimer2
  • ntdll.dll!NtCreateWaitCompletionPacket
  • ntdll.dll!NtCreateWorkerFactory
  • ntdll.dll!NtDelayExecution
  • ntdll.dll!NtDeviceIoControlFile
  • ntdll.dll!NtDuplicateObject
  • ntdll.dll!NtDuplicateToken
  • ntdll.dll!NtEnumerateKey
  • ntdll.dll!NtEnumerateValueKey
  • ntdll.dll!NtFlushProcessWriteBuffers
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtFsControlFile
  • ntdll.dll!NtGetCachedSigningLevel
  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtNotifyChangeKey
  • ntdll.dll!NtOpenDirectoryObject
  • ntdll.dll!NtOpenEvent
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtOpenKeyEx
  • ntdll.dll!NtOpenProcess
  • ntdll.dll!NtOpenProcessToken
  • ntdll.dll!NtOpenProcessTokenEx
  • ntdll.dll!NtOpenSection
  • ntdll.dll!NtOpenSymbolicLinkObject
  • ntdll.dll!NtOpenThreadToken
  • ntdll.dll!NtOpenThreadTokenEx
  • 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!NtQueryObject
  • ntdll.dll!NtQueryPerformanceCounter
  • ntdll.dll!NtQuerySecurityAttributesToken
  • ntdll.dll!NtQuerySecurityObject
  • ntdll.dll!NtQuerySymbolicLinkObject
  • ntdll.dll!NtQuerySystemInformation
  • ntdll.dll!NtQuerySystemInformationEx
  • ntdll.dll!NtQueryValueKey
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtQueryVolumeInformationFile
  • ntdll.dll!NtQueryWnfStateData
  • ntdll.dll!NtQueueApcThreadEx2
  • ntdll.dll!NtReadFile
  • ntdll.dll!NtReadVirtualMemory
  • ntdll.dll!NtReleaseMutant
  • ntdll.dll!NtReleaseSemaphore
  • ntdll.dll!NtReleaseWorkerFactoryWorker
  • ntdll.dll!NtRemoveIoCompletion
  • ntdll.dll!NtRemoveIoCompletionEx
  • ntdll.dll!NtRequestWaitReplyPort
  • ntdll.dll!NtResumeThread
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationFile
  • ntdll.dll!NtSetInformationKey
  • ntdll.dll!NtSetInformationObject
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationThread
  • ntdll.dll!NtSetInformationVirtualMemory
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtSetIoCompletion
  • ntdll.dll!NtSetTimer2
  • ntdll.dll!NtSetTimerEx
  • ntdll.dll!NtSubscribeWnfStateChange
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl

27 additional items are not displayed above.

Network Winsock2
  • WSAGetOverlappedResult
  • WSASocket
  • WSAStartup
  • WSAttemptAutodialName
Process Manipulation Evasion
  • NtUnmapViewOfSection
Process Shell Execute
  • CreateProcess
Network Info Queried
  • GetAdaptersAddresses
Network Winsock
  • bind
  • closesocket
  • freeaddrinfo
  • getaddrinfo
  • socket
User Data Access
  • GetUserDefaultLocaleName
  • GetUserName
  • GetUserNameEx
  • GetUserObjectInformation
Encryption Used
  • BCryptOpenAlgorithmProvider
Other Suspicious
  • AdjustTokenPrivileges
Anti Debug
  • IsDebuggerPresent
  • NtQuerySystemInformation

Shell Command Execution

C:\WINDOWS\System32\WindowsPowerShell\v1.0\powershell.exe powershell -Command "Add-Type -AssemblyName System.Windows.Forms

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