TrojanDownloader.Agent.A4

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

What is TrojanDownloader.Agent.A4 infection?

In this post you will find about the definition of TrojanDownloader.Agent.A4 and also its negative impact on your computer. Such ransomware are a type of malware that is clarified by on-line frauds to require paying the ransom by a victim.

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Most of the situations, TrojanDownloader.Agent.A4 ransomware will certainly advise its targets to launch funds move for the function of counteracting the amendments that the Trojan infection has introduced to the target’s gadget.

TrojanDownloader.Agent.A4 Summary

These adjustments can be as adheres to:

  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • Unconventionial language used in binary resources: Chinese (Simplified);
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the victim’s hard disk — so the victim can no more utilize the data;
  • Preventing normal 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.

TrojanDownloader.Agent.A4

One of the most common networks whereby TrojanDownloader.Agent.A4 Ransomware Trojans are injected are:

  • By means of phishing e-mails;
  • As an effect of customer winding up on a resource that organizes a malicious software;

As soon as the Trojan is efficiently injected, it will certainly either cipher the data on the target’s PC or protect against the tool from functioning in a correct manner – while also positioning a ransom note that mentions the need for the victims to impact the payment for the objective of decrypting the records or recovering the documents system back to the first condition. In many circumstances, the ransom note will certainly turn up when the client reboots the COMPUTER after the system has actually currently been harmed.

TrojanDownloader.Agent.A4 distribution networks.

In numerous edges of the world, TrojanDownloader.Agent.A4 expands by leaps and bounds. However, the ransom notes and techniques of extorting the ransom amount may vary depending upon specific local (local) setups. The ransom money notes and methods of extorting the ransom quantity may vary depending on particular local (regional) setups.

Ransomware injection

For instance:

    Faulty informs about unlicensed software program.

    In certain locations, the Trojans usually wrongfully report having identified some unlicensed applications enabled on the victim’s gadget. The alert after that requires the individual to pay the ransom.

    Faulty statements concerning illegal content.

    In nations where software piracy is much less popular, this method is not as effective for the cyber frauds. Alternatively, the TrojanDownloader.Agent.A4 popup alert may wrongly claim to be originating from a police institution as well as will report having situated kid pornography or other illegal information on the gadget.

    TrojanDownloader.Agent.A4 popup alert might wrongly declare to be obtaining from a legislation enforcement organization and will certainly report having located kid pornography or other illegal information on the device. The alert will similarly consist of a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: 3478A17C
md5: 1d56afd9144b33cad607d03d064bd464
name: zsjtf.exe
sha1: 3b7040d3917bb6e5ca4de80774720e87ed325911
sha256: a198fcf768ee9e0ac0d5e6def4411ee2048865294276340d07eae6ce6c3fbb32
sha512: 856553c21ba440853f60909c4f77860ce4f6163c33737fbe1b2f9d061cd274ead1a578be9660d7d2557f1ae9a14a4be31d59a9fe7a01895ec655ccb7b1150c43
ssdeep: 24576:hUcZ1WuzzUivXkYKRwDetY3zTPWd7VRQKugHC0oKS:hD9huwDetY3zT+d7X7BSKS
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

TrojanDownloader.Agent.A4 also known as:

GridinSoftTrojan.Ransom.Gen
FireEyeGeneric.mg.1d56afd9144b33ca
CAT-QuickHealTrojanDownloader.Agent.A4
McAfeeDownloader-FRK!1D56AFD9144B
CylanceUnsafe
VIPRETrojan.Win32.Generic!BT
SangforMalware
K7AntiVirusRiskware ( 0040eff71 )
K7GWRiskware ( 0040eff71 )
Cybereasonmalicious.3917bb
Invinceaheuristic
BaiduWin32.Trojan-Downloader.Agent.s
F-ProtW32/Adload.AG.gen!Eldorado
SymantecTrojan.Gen.MBT
TotalDefenseWin32/Tnega.CfCAeIB
APEXMalicious
AvastWin32:Malware-gen
ClamAVWin.Trojan.Downloader-64707
GDataWin32.Trojan-Downloader.GMUnpackerInstaller.B
Kasperskynot-a-virus:Downloader.Win32.Agent.ajuq
AlibabaTrojan:Win32/GMUnpackerInstaller.2fb78b23
NANO-AntivirusTrojan.Win32.Agent.cqkyco
AegisLabAdware.Win32.GMUnpackerInstaller.lTGU
RisingTrojan.Adkuadu!8.EE1 (CLOUD)
Endgamemalicious (high confidence)
ComodoApplication.Win32.Kuaiba.BC@5np13a
F-SecureProgram.APPL/GMUnpack.Gen8
DrWebTrojan.DownLoader10.13268
ZillyaDownloader.Agent.Win32.180413
TrendMicroPUA.Win32.GMUnpack.SM
McAfee-GW-EditionBehavesLike.Win32.Ransomware.dc
SophosGeneric PUA DL (PUA)
IkarusPUA.Gen
CyrenW32/Adload.AG.gen!Eldorado
MaxSecureDropper.Injector.hxbu
AviraAPPL/GMUnpack.Gen8
WebrootW32.Malware.gen
Antiy-AVLRiskWare[Downloader]/Win32.Agent.ajuq
SUPERAntiSpywareTrojan.Agent/Gen-Downloader
ZoneAlarmnot-a-virus:Downloader.Win32.Agent.ajuq
MicrosoftTrojan:Win32/Adkuadu!rfn
AhnLab-V3Trojan/Win32.Gen.C180167
Acronissuspicious
VBA32Downloader.Agent
PandaTrj/Genetic.gen
ESET-NOD32a variant of Win32/GMUnpackerInstaller.B potentially unwanted
TrendMicro-HouseCallPUA.Win32.GMUnpack.SM
TencentMalware.Win32.Gencirc.10b66ba5
YandexTrojan.Agent!tXiph5Dg1jk
SentinelOneDFI – Suspicious PE
eGambitUnsafe.AI_Score_99%
FortinetRiskware/Agent
BitDefenderThetaGen:NN.ZexaF.34100.!qZ@aK3ofuoj
AVGWin32:Malware-gen
Paloaltogeneric.ml
CrowdStrikewin/malicious_confidence_60% (W)
Qihoo-360Win32/Virus.Downloader.878

How to remove TrojanDownloader.Agent.A4 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 TrojanDownloader.Agent.A4 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove TrojanDownloader.Agent.A4 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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