Threat Database Trojans Trojan.MSIL.Krypt.BCK

Trojan.MSIL.Krypt.BCK

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 18
First Seen: June 18, 2022
Last Seen: February 5, 2026
OS(es) Affected: Windows

The detection of Trojan.MSIL.Krypt.BCK indicates that your system has been compromised by a potentially malicious program. This type of threat is designed to infiltrate and damage your computer, often without your knowledge or consent. It is essential to understand the nature of this threat and take immediate action to remove it and prevent further harm.

What Is Trojan.MSIL.Krypt.BCK?

Trojan.MSIL.Krypt.BCK is a type of Trojan horse malware, which is a broad category of malicious software that disguises itself as legitimate programs. The name "Trojan.MSIL.Krypt.BCK" suggests that it may be related to encryption or cryptography, but without further information, it is difficult to determine its specific purpose or behavior. Trojans can be used for a variety of malicious activities, including data theft, system compromise, and distribution of additional malware.

How Trojan.MSIL.Krypt.BCK Operates

Like other Trojans, Trojan.MSIL.Krypt.BCK is likely designed to operate stealthily, avoiding detection by security software and system administrators. It may use various techniques to evade detection, such as code obfuscation, anti-debugging, and exploiting vulnerabilities in system software. Once installed, the Trojan can communicate with its command and control servers to receive instructions, transmit stolen data, or download additional malware. The exact mechanisms used by Trojan.MSIL.Krypt.BCK are unknown, but it is likely that it uses common Trojan tactics to achieve its goals.

Symptoms of Infection

Systems infected with Trojan.MSIL.Krypt.BCK may exhibit a range of symptoms, including slow system performance, unexpected crashes, and unusual network activity. You may also notice unfamiliar programs or icons on your system, or receive unexpected pop-ups or alerts. In some cases, the Trojan may attempt to disguise itself as a legitimate program, making it difficult to detect. If you suspect that your system has been infected with Trojan.MSIL.Krypt.BCK, it is essential to take immediate action to remove the threat and prevent further damage.

How to Remove Trojan.MSIL.Krypt.BCK

  1. Boot your system in Safe Mode with Networking to prevent the Trojan 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 any malicious software.
  3. Uninstall any suspicious programs or applications that may be related to the Trojan.
  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 a follow-up scan to ensure that the Trojan has been completely removed.

Conclusion

Removing Trojan.MSIL.Krypt.BCK from your system requires careful attention to detail and a thorough understanding of the threat. By following the steps outlined above and using reputable security software, you can help to ensure that your system is protected from this and other malicious threats. It is also essential to maintain good system hygiene, including regularly updating your operating system and software, using strong passwords, and avoiding suspicious downloads or email attachments. By taking these precautions, you can help to prevent future infections and keep your system safe from harm.

Analysis Report

General information

Family Name: Trojan.MSIL.Krypt.BCK
Signature status: No Signature

Known Samples

MD5: 42be482584560e948ad959269e5b9dff
SHA1: 08faad14389d2593055b231b6cfa0df6c1285ea5
SHA256: 2C4757FE1486917F54F8087D7DC08D6E765CB079A9D1103E14E13BA157DC29A9
File Size: 717.82 KB, 717824 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)
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  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

Windows PE Version Information

Name Value
Assembly Version 1.0.0.0
File Description Loader
File Version 1.0.0.0
Internal Name Loader.exe
Legal Copyright Copyright © 2021
Original Filename Loader.exe
Product Name Loader
Product Version 1.0.0.0

File Traits

  • .NET
  • x86

Block Information

Total Blocks: 16
Potentially Malicious Blocks: 12
Whitelisted Blocks: 4
Unknown Blocks: 0

Visual Map

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

Similar Families

  • MSIL.Krypt.BCK

Files Modified

File Attributes
c:\users\user\appdata\roaming\pid Synchronize,Write Attributes
c:\users\user\appdata\roaming\pid\5088 Generic Write,Read Attributes

Registry Modifications

Key::Value Data API Name
HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\explorer.exe ᨝쑛錸ǜ RegNtPreCreateKey

Windows API Usage

Category API
User Data Access
  • GetComputerName
  • GetUserDefaultLocaleName
  • GetUserObjectInformation
Anti Debug
  • IsDebuggerPresent
  • NtQuerySystemInformation
Process Manipulation Evasion
  • NtUnmapViewOfSection
Process Shell Execute
  • CreateProcess
Syscall Use
  • ntdll.dll!NtAddAtomEx
  • ntdll.dll!NtAlpcConnectPort
  • ntdll.dll!NtAlpcConnectPortEx
  • ntdll.dll!NtAlpcCreateSecurityContext
  • ntdll.dll!NtAlpcDeleteSecurityContext
  • ntdll.dll!NtAlpcQueryInformation
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtClose
  • ntdll.dll!NtConnectPort
Show More
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateFile
  • ntdll.dll!NtCreateKey
  • ntdll.dll!NtCreateMutant
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateSemaphore
  • ntdll.dll!NtDeviceIoControlFile
  • ntdll.dll!NtDuplicateObject
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtOpenDirectoryObject
  • ntdll.dll!NtOpenEvent
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtOpenKeyEx
  • ntdll.dll!NtOpenProcessToken
  • ntdll.dll!NtOpenSection
  • ntdll.dll!NtOpenSemaphore
  • ntdll.dll!NtOpenThreadToken
  • ntdll.dll!NtProtectVirtualMemory
  • ntdll.dll!NtQueryAttributesFile
  • ntdll.dll!NtQueryEvent
  • 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!NtQueryValueKey
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtQueryWnfStateData
  • ntdll.dll!NtQueryWnfStateNameInformation
  • ntdll.dll!NtReadVirtualMemory
  • ntdll.dll!NtReleaseMutant
  • ntdll.dll!NtReleaseSemaphore
  • ntdll.dll!NtReleaseWorkerFactoryWorker
  • ntdll.dll!NtRequestWaitReplyPort
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationKey
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationThread
  • ntdll.dll!NtSetInformationVirtualMemory
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtSetSystemInformation
  • ntdll.dll!NtSetTimer2
  • ntdll.dll!NtSubscribeWnfStateChange
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtTraceEvent
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtUnmapViewOfSectionEx
  • ntdll.dll!NtUpdateWnfStateData
  • ntdll.dll!NtWaitForMultipleObjects
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWriteFile
  • UNKNOWN

Shell Command Execution

C:\Windows\explorer.exe (NULL)

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