Threat Database Trojans Trojan.MSIL.Krypt.CJA

Trojan.MSIL.Krypt.CJA

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 2
First Seen: September 12, 2024
Last Seen: August 30, 2025
OS(es) Affected: Windows

The detection of Trojan.MSIL.Krypt.CJA on your system indicates a potential security threat that requires immediate attention. This report aims to provide you with a comprehensive understanding of the threat, its operating mechanisms, symptoms of infection, and most importantly, a step-by-step guide on how to remove it from your system.

What Is Trojan.MSIL.Krypt.CJA?

Trojan.MSIL.Krypt.CJA is identified as a Trojan-type threat. Trojans are malicious programs that can sneak onto your computer and perform a variety of harmful actions. They are often disguised as legitimate software, making them difficult to detect. The name suggests it's written in MSIL (Microsoft Intermediate Language), which is a platform-agnostic, object-oriented programming language, and it might have encryption or obfuscation capabilities, indicated by "Krypt". Understanding the nature of this threat is crucial for devising an effective removal strategy.

How Trojan.MSIL.Krypt.CJA Operates

Trojan.MSIL.Krypt.CJA, like other Trojans, operates by exploiting vulnerabilities in your system's security to gain unauthorized access. Once inside, it can perform various malicious activities, including but not limited to, stealing sensitive information, installing additional malware, providing backdoor access to hackers, and disrupting system operations. Its ability to operate undetected for a period can lead to severe consequences, including data theft and system compromise.

Symptoms of Infection

Identifying the symptoms of a Trojan infection can be challenging due to its stealthy nature. However, common indicators include unexpected system crashes, slow system performance, unfamiliar programs or toolbars, unusual network activity, and pop-ups or spam. If you've noticed any of these symptoms, it's essential to take immediate action to mitigate potential damage.

  • Unexplained changes in system settings or files.
  • New, unfamiliar icons on your desktop or in your system tray.
  • Increased CPU usage without any apparent reason.
  • Difficulty in accessing certain files or programs.

How to Remove Trojan.MSIL.Krypt.CJA

  1. Boot into Safe Mode with Networking: This will limit the malware's ability to interfere with the removal process. Restart your computer, and as it boots up, press the F8 key repeatedly until you see the Advanced Boot Options menu. Select Safe Mode with Networking and press Enter.
  2. Perform a Full Scan with a Reputable Tool: Utilize a reputable anti-malware tool, such as SpyHunter, to perform a full system scan. Ensure the tool is updated to the latest version to guarantee it can detect the most recent threats.
  3. Uninstall Suspicious Programs: Go through your installed programs and uninstall any that you don't recognize or no longer need. Be cautious, as some malware might disguise itself as legitimate software.
  4. Reset Your Browser: If your browser has been affected, resetting it to its default settings can help remove any malicious extensions or settings. This can typically be done through the browser's settings menu (e.g., Chrome, Firefox, Edge).
  5. Reboot and Re-scan: After completing the above steps, reboot your computer in normal mode and perform another scan with your anti-malware tool to ensure all threats have been removed.

Conclusion

Removing Trojan.MSIL.Krypt.CJA requires a systematic approach to ensure all components of the malware are eliminated from your system. By following the steps outlined in this report, you should be able to successfully remove the threat and restore your system's security. It's also crucial to adopt preventive measures, such as keeping your operating system and software up-to-date, using strong antivirus software, and practicing safe browsing habits to minimize the risk of future infections.

Analysis Report

General information

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

Known Samples

MD5: fd2e3782d7f4e5ee1d19a42f375d0dfe
SHA1: d5f2494f801e12843597e93baa1ae37ab8f7f313
SHA256: 16B4E94A74967ABF2F5A58C5E4624ED32DFA5CAE9FAD50E05047542D3D67C913
File Size: 259.07 KB, 259072 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)

File Icons

Windows PE Version Information

Name Value
Assembly Version 1.0.0.0
Comments Hakuna Matata 1.7 Source Extracted by HeightCoder
File Description Hakuna Matata
File Version 1.0.0.0
Internal Name Hakuna Matata.exe
Legal Copyright Copyright © HeightCoder 2024
Original Filename Hakuna Matata.exe
Product Name Hakuna Matata
Product Version 1.0.0.0

File Traits

  • .NET
  • x86

Block Information

Total Blocks: 124
Potentially Malicious Blocks: 71
Whitelisted Blocks: 53
Unknown Blocks: 0

Visual Map

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

Similar Families

  • MSIL.Krypt.CJA

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAlpcConnectPort
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtClearEvent
  • ntdll.dll!NtClose
  • ntdll.dll!NtConnectPort
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateFile
  • ntdll.dll!NtCreateMutant
  • ntdll.dll!NtCreatePrivateNamespace
Show More
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateSemaphore
  • ntdll.dll!NtCreateThreadEx
  • ntdll.dll!NtDeviceIoControlFile
  • 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!NtRequestWaitReplyPort
  • ntdll.dll!NtResumeThread
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationFile
  • ntdll.dll!NtSetInformationKey
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationThread
  • ntdll.dll!NtSetInformationVirtualMemory
  • 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
Anti Debug
  • IsDebuggerPresent

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