What is Trojan.Agent.FCUJ infection?

In this post you will locate about the meaning of Trojan.Agent.FCUJ as well as its negative impact on your computer system. Such ransomware are a form of malware that is clarified by online fraudulences to require paying the ransom by a target.

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Most of the instances, Trojan.Agent.FCUJ virus will instruct its victims to initiate funds move for the function of counteracting the modifications that the Trojan infection has introduced to the target’s tool.

Trojan.Agent.FCUJ Summary

These alterations can be as complies with:

  • 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.
  • A process created a hidden window;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • 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 papers situated on the victim’s hard drive — so the victim can no longer make use of the data;
  • Preventing routine accessibility to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.
Similar behavior
Related domains Ransom.Win32.Banker.oa Ransom.Win32.Banker.oa


The most typical channels where Trojan.Agent.FCUJ are injected are:

  • By methods of phishing emails;
  • As an effect of user winding up on a resource that organizes a malicious software program;

As quickly as the Trojan is effectively injected, it will either cipher the information on the victim’s PC or avoid the gadget from functioning in an appropriate fashion – while likewise putting a ransom money note that states the demand for the sufferers to effect the payment for the objective of decrypting the records or restoring the documents system back to the preliminary condition. In a lot of instances, the ransom note will certainly show up when the client restarts the PC after the system has already been harmed.

Trojan.Agent.FCUJ distribution networks.

In various edges of the world, Trojan.Agent.FCUJ expands by leaps and bounds. Nevertheless, the ransom money notes and techniques of extorting the ransom money amount may differ depending on particular local (regional) settings. The ransom notes and also methods of obtaining the ransom amount may vary depending on specific neighborhood (local) setups.

Ransomware injection

For example:

    Faulty alerts about unlicensed software.

    In specific areas, the Trojans frequently wrongfully report having actually found some unlicensed applications made it possible for on the victim’s tool. The sharp then requires the customer to pay the ransom money.

    Faulty statements about illegal web content.

    In countries where software application piracy is much less prominent, this approach is not as efficient for the cyber frauds. Additionally, the Trojan.Agent.FCUJ popup alert might incorrectly declare to be stemming from a police organization as well as will report having situated kid pornography or other illegal information on the gadget.

    Trojan.Agent.FCUJ popup alert might incorrectly assert to be acquiring from a regulation enforcement organization and will report having situated child porn or various other unlawful data on the device. The alert will similarly contain a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: E39920E9
md5: c2b307f0abcdbc162087c166b638786c
name: C2B307F0ABCDBC162087C166B638786C.mlw
sha1: 57ae53b15aa129791aa2745ce3bba3385f4b3759
sha256: 7f2eb84749c19f521a9a1ab46fbd133e95b971c63f216a6fcf53edca62748400
sha512: 64cbefaeaf917367b39d60b62ed4ab2d3381d5b7ebe1988043215e2a6ac1aae9e1e903d9cc5e732a7ebdbcd21064f1f610276cf462124b05ee5aa53cc0fe70f7
ssdeep: 6144:nMLWCfv7np6D1NaWF88siwzYiPU8PDUuX3hU:n8WCfv7n21NaH9ZzYbAUGy
type: PE32 executable (DLL) (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan.Agent.FCUJ also known as:

GridinSoft Trojan.Ransom.Gen
DrWeb BackDoor.Qbot.582
MicroWorld-eScan Trojan.Agent.FCUJ
FireEye Trojan.Agent.FCUJ
ALYac Trojan.Agent.QakBot
VIPRE Win32.Malware!Drop
AegisLab Trojan.Win32.Qbot.7!c
Sangfor Malware
CrowdStrike win/malicious_confidence_100% (W)
BitDefender Trojan.Agent.FCUJ
K7GW Trojan ( 005773661 )
K7AntiVirus Trojan ( 005773661 )
Cyren W32/Trojan.DASC-6460
Symantec Trojan Horse
Avast Win32:DangerousSig [Trj]
ClamAV Win.Malware.Fcuj-9829288-0
Kaspersky Trojan-Banker.Win32.Qbot.zzy
Alibaba TrojanBanker:Win32/Kryptik.4edbdf27
ViRobot Trojan.Win32.Z.Qbot.305640.D
Ad-Aware Trojan.Agent.FCUJ
Sophos Mal/Generic-R + Troj/Inject-GSB
Comodo Malware@#m1ryrquar71y
F-Secure Trojan.TR/AD.Qbot.lyfna
TrendMicro Trojan.Win32.MALREP.THBOCBA
McAfee-GW-Edition Artemis!Trojan
Emsisoft MalCert.A (A)
Avira TR/AD.Qbot.lyfna
MAX malware (ai score=82)
Kingsoft Win32.Troj.Banker.(kcloud)
Gridinsoft Ransom.Win32.Banker.oa
Arcabit Trojan.Agent.FCUJ
ZoneAlarm Trojan-Banker.Win32.Qbot.zzy
GData Trojan.Agent.FCUJ
Cynet Malicious (score: 85)
McAfee Trojan-FTJC!C2B307F0ABCD
VBA32 Backdoor.QBot
Malwarebytes Backdoor.Qbot
Panda Trj/Genetic.gen
ESET-NOD32 a variant of Win32/Kryptik.HJFW
TrendMicro-HouseCall Trojan.Win32.MALREP.THBOCBA
Rising Trojan.MalCert!1.D23E (CLOUD)
Ikarus Backdoor.QBot
Fortinet W32/GenCBL.XA!tr
Webroot W32.Trojan.Gen
AVG Win32:DangerousSig [Trj]
Qihoo-360 Win32/Backdoor.QakBot.HgkASOUA

How to remove Trojan.Agent.FCUJ ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
Reasons why I would recommend GridinSoft1

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.FCUJ 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.FCUJ you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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