Trojan.Agent.EXJK (B)

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is Trojan.Agent.EXJK (B) infection?

In this article you will certainly find regarding the definition of Trojan.Agent.EXJK (B) as well as its unfavorable effect on your computer system. Such ransomware are a type of malware that is specified by online fraudulences to demand paying the ransom by a target.

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In the majority of the instances, Trojan.Agent.EXJK (B) virus will certainly instruct its victims to launch funds move for the function of counteracting the changes that the Trojan infection has presented to the target’s device.

Trojan.Agent.EXJK (B) Summary

These alterations can be as follows:

  • Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Presents an Authenticode digital signature;
  • Creates RWX memory. There is a security trick with memory regions that allows an attacker to fill a buffer with a shellcode and then execute it. Filling a buffer with shellcode isn’t a big deal, it’s just data. The problem arises when the attacker is able to control the instruction pointer (EIP), usually by corrupting a function’s stack frame using a stack-based buffer overflow, and then changing the flow of execution by assigning this pointer to the address of the shellcode.
  • Possible date expiration check, exits too soon after checking local time;
  • A process attempted to delay the analysis task.;
  • A named pipe was used for inter-process communication;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • A process created a hidden window;
  • Unconventionial language used in binary resources: Hungarian;
  • Uses Windows utilities for basic functionality;
  • Executed a process and injected code into it, probably while unpacking;
  • Installs itself for autorun at Windows startup.

    There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the sufferer’s hard drive — so the target can no longer make use of the data;
  • Preventing routine access to the sufferer’s workstation;

Trojan.Agent.EXJK (B)

The most typical networks where Trojan.Agent.EXJK (B) Trojans are infused are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a consequence of individual winding up on a source that holds a harmful software;

As quickly as the Trojan is efficiently injected, it will either cipher the information on the sufferer’s computer or protect against the device from functioning in an appropriate manner – while likewise placing a ransom money note that discusses the demand for the sufferers to impact the settlement for the objective of decrypting the records or restoring the documents system back to the initial condition. In the majority of circumstances, the ransom money note will certainly show up when the customer reboots the COMPUTER after the system has currently been damaged.

Trojan.Agent.EXJK (B) distribution networks.

In different corners of the globe, Trojan.Agent.EXJK (B) grows by jumps and bounds. However, the ransom notes and also techniques of extorting the ransom quantity might differ depending upon specific neighborhood (regional) settings. The ransom notes and methods of extorting the ransom quantity may vary depending on specific local (regional) settings.

Ransomware injection

For example:

    Faulty notifies about unlicensed software.

    In particular areas, the Trojans frequently wrongfully report having actually identified some unlicensed applications made it possible for on the victim’s tool. The sharp then demands the individual to pay the ransom money.

    Faulty statements concerning prohibited web content.

    In countries where software application piracy is less preferred, this technique is not as efficient for the cyber frauds. Alternatively, the Trojan.Agent.EXJK (B) popup alert may falsely claim to be originating from a law enforcement organization as well as will certainly report having situated kid porn or various other unlawful information on the tool.

    Trojan.Agent.EXJK (B) popup alert may wrongly declare to be acquiring from a law enforcement institution as well as will certainly report having located youngster pornography or other unlawful data on the tool. The alert will in a similar way contain a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: FB3F0C93
md5: 4e7322d81ae3498efbd6ad8de4784788
name: 238428.png
sha1: 3f6c92e29b42b2863a3844016bbd06293a0cba57
sha256: e28fd94d327ccd4e1107dc540b1c05cbc824b08a8b40202a6d711384a2de7eb3
sha512: 5cad6854f1cbc6ca8115dbce27f4d86bd5dc39ac76f561038b8544defc063bf7fbd291f744f5b541f34874f6ed529a10da89d2b85372c66ec00905a3eccf066f
ssdeep: 6144:VgfRCEBsOYa5y3g0q+Z1Af61g8nC8StMkuNURdRoc0WKkm5v:eJCEyOYsqLjACi8C8vJZkm5v
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan.Agent.EXJK (B) also known as:

GridinSoftTrojan.Ransom.Gen
Elasticmalicious (high confidence)
MicroWorld-eScanTrojan.Agent.EXJK
FireEyeGeneric.mg.4e7322d81ae3498e
Qihoo-360HEUR/QVM20.1.65DA.Malware.Gen
CylanceUnsafe
SangforMalware
BitDefenderTrojan.Agent.EXJK
Cybereasonmalicious.29b42b
SymantecML.Attribute.HighConfidence
APEXMalicious
Ad-AwareTrojan.Agent.EXJK
F-SecureHeuristic.HEUR/AGEN.1101566
InvinceaGeneric ML PUA (PUA)
EmsisoftTrojan.Agent.EXJK (B)
SentinelOneDFI – Suspicious PE
AviraHEUR/AGEN.1101566
MicrosoftTrojan:Win32/Wacatac.C!ml
CynetMalicious (score: 90)
MAXmalware (ai score=88)
ESET-NOD32Win32/Qbot.CN
RisingTrojan.Generic@ML.85 (RDML:wUrwsPtiZXREu1YIFBJFxQ)
eGambitUnsafe.AI_Score_96%
FortinetW32/Phobos.HGAF!tr.ransom

How to remove Trojan.Agent.EXJK (B) ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

Run the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.

Run Setup.exe

An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.

GridinSoft Anti-Malware Setup

Press “Install” button.

GridinSoft Anti-Malware Install

Once installed, Anti-Malware will automatically run.

GridinSoft Anti-Malware Splash-Screen

Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for Trojan.Agent.EXJK (B) files and other malicious programs. This process can take a 20-30 minutes, so I suggest you periodically check on the status of the scan process.

GridinSoft Anti-Malware Scanning

Click on “Clean Now”.

When the scan has finished, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

GridinSoft Anti-Malware will scan and clean your PC for free in the trial period. The free version offer real-time protection for first 2 days. If you want to be fully protected at all times – I can recommended you to purchase a full version:

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If the guide doesn’t help you to remove Trojan.Agent.EXJK (B) you can always ask me in the comments for getting help.

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/comparison

About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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