Threat Database Trojans Trojan.Downloader.JCA

Trojan.Downloader.JCA

By CagedTech in Trojans

Threat Scorecard

Popularity Rank: 9,821
Threat Level: 80 % (High)
Infected Computers: 10
First Seen: April 13, 2026
Last Seen: July 16, 2026
OS(es) Affected: Windows

The detection of Trojan.Downloader.JCA indicates that your system has been compromised by a potentially malicious program. This type of threat is designed to download and install additional malware or unwanted software on your computer, which can lead to a range of problems, including data theft, system crashes, and slowed performance. It is essential to take immediate action to remove the threat and prevent further damage.

What Is Trojan.Downloader.JCA?

Trojan.Downloader.JCA is a type of Trojan horse malware that is designed to download and install additional malware or unwanted software on your computer. The name "Trojan" refers to the fact that this type of malware disguises itself as a legitimate program, allowing it to evade detection and gain access to your system. The "Downloader" part of the name indicates that this malware is capable of downloading and installing additional software, which can include other types of malware, adware, or unwanted programs.

How Trojan.Downloader.JCA Operates

Trojan.Downloader.JCA operates by exploiting vulnerabilities in your system or by tricking you into installing it voluntarily. Once installed, it can download and install additional malware or unwanted software, which can include keyloggers, ransomware, or other types of malicious programs. This malware can also modify system settings, disable security software, and create backdoors to allow remote access to your computer. The goal of Trojan.Downloader.JCA is to compromise your system and steal sensitive information, such as login credentials, financial data, or personal information.

Symptoms of Infection

The symptoms of a Trojan.Downloader.JCA infection can vary, but common indicators include slowed system performance, frequent crashes, and unusual pop-ups or advertisements. You may also notice that your browser homepage has changed, or that new toolbars or extensions have been installed without your consent. In some cases, you may receive alerts from your security software indicating that a malicious program has been detected. If you suspect that your system has been infected with Trojan.Downloader.JCA, it is essential to take immediate action to remove the threat.

How to Remove Trojan.Downloader.JCA

  1. Restart your computer in Safe Mode with Networking to prevent the malware from loading and to allow your security software to run more effectively.
  2. Run a full scan with a reputable anti-malware tool, such as SpyHunter, to detect and remove all instances of the malware.
  3. Uninstall any suspicious programs or software that you do not recognize or that were installed without your consent.
  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 computer and run another full scan with your anti-malware tool to ensure that all instances of the malware have been removed.

Conclusion

Removing Trojan.Downloader.JCA from your system requires careful attention to detail and a thorough understanding of the malware removal process. By following the steps outlined above, you can help to ensure that your system is free from this potentially malicious program and that your sensitive information is protected. Remember to always be cautious when installing new software, and to never click on suspicious links or download attachments from unknown sources. By taking these precautions, you can help to prevent future infections and keep your system running smoothly and securely.

Analysis Report

General information

Family Name: Trojan.Downloader.JCA
Signature status: No Signature

Known Samples

MD5: ebb746d8a79e9e178a1e90716fae4012
SHA1: 9362068c58b49c8ec4fbd9a5431757b87c7c42af
SHA256: 4243A07A064A798FBE49A4B33E667530038D78A4544CC0089900E3A2F470340F
File Size: 1.92 MB, 1916416 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 64-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is Native application (NOT .NET application)
  • 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
Company Name Kai Schtrom
File Description DSE-Patcher
File Version 1.0.0.0
Internal Name DSE-Patcher.exe
Legal Copyright Copyright © Kai Schtrom 2022
Original Filename DSE-Patcher.exe
Product Name DSE-Patcher
Product Version 1.0.0.0

File Traits

  • HighEntropy
  • x64

Block Information

Total Blocks: 50
Potentially Malicious Blocks: 31
Whitelisted Blocks: 19
Unknown Blocks: 0

Visual Map

0 0 0 0 1 0 0 1 0 0 0 0 0 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 0 0 x 1 0 0 0
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

Similar Families

  • Downloader.JCA

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAddAtomEx
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtClose
  • ntdll.dll!NtConnectPort
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateMutant
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtMapViewOfSection
Show More
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtOpenKeyEx
  • ntdll.dll!NtOpenSection
  • ntdll.dll!NtProtectVirtualMemory
  • ntdll.dll!NtQueryAttributesFile
  • ntdll.dll!NtQueryInformationFile
  • 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!NtQueryVolumeInformationFile
  • ntdll.dll!NtReadRequestData
  • ntdll.dll!NtReleaseMutant
  • ntdll.dll!NtRequestWaitReplyPort
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationThread
  • ntdll.dll!NtSetInformationVirtualMemory
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtTerminateProcess
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtWaitForMultipleObjects
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWriteFile
  • UNKNOWN

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