TrojanDownloader.Agent.A4

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.

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: 3478A17Cmd5: 1d56afd9144b33cad607d03d064bd464name: zsjtf.exesha1: 3b7040d3917bb6e5ca4de80774720e87ed325911sha256: a198fcf768ee9e0ac0d5e6def4411ee2048865294276340d07eae6ce6c3fbb32sha512: 856553c21ba440853f60909c4f77860ce4f6163c33737fbe1b2f9d061cd274ead1a578be9660d7d2557f1ae9a14a4be31d59a9fe7a01895ec655ccb7b1150c43ssdeep: 24576:hUcZ1WuzzUivXkYKRwDetY3zTPWd7VRQKugHC0oKS:hD9huwDetY3zT+d7X7BSKStype: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

TrojanDownloader.Agent.A4 also known as:

GridinSoft Trojan.Ransom.Gen
FireEye Generic.mg.1d56afd9144b33ca
CAT-QuickHeal TrojanDownloader.Agent.A4
McAfee Downloader-FRK!1D56AFD9144B
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Malware
K7AntiVirus Riskware ( 0040eff71 )
K7GW Riskware ( 0040eff71 )
Cybereason malicious.3917bb
Invincea heuristic
Baidu Win32.Trojan-Downloader.Agent.s
F-Prot W32/Adload.AG.gen!Eldorado
Symantec Trojan.Gen.MBT
TotalDefense Win32/Tnega.CfCAeIB
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Trojan.Downloader-64707
GData Win32.Trojan-Downloader.GMUnpackerInstaller.B
Kaspersky not-a-virus:Downloader.Win32.Agent.ajuq
Alibaba Trojan:Win32/GMUnpackerInstaller.2fb78b23
NANO-Antivirus Trojan.Win32.Agent.cqkyco
AegisLab Adware.Win32.GMUnpackerInstaller.lTGU
Rising Trojan.Adkuadu!8.EE1 (CLOUD)
Endgame malicious (high confidence)
Comodo Application.Win32.Kuaiba.BC@5np13a
F-Secure Program.APPL/GMUnpack.Gen8
DrWeb Trojan.DownLoader10.13268
Zillya Downloader.Agent.Win32.180413
TrendMicro PUA.Win32.GMUnpack.SM
McAfee-GW-Edition BehavesLike.Win32.Ransomware.dc
Sophos Generic PUA DL (PUA)
Ikarus PUA.Gen
Cyren W32/Adload.AG.gen!Eldorado
MaxSecure Dropper.Injector.hxbu
Avira APPL/GMUnpack.Gen8
Webroot W32.Malware.gen
Antiy-AVL RiskWare[Downloader]/Win32.Agent.ajuq
SUPERAntiSpyware Trojan.Agent/Gen-Downloader
ZoneAlarm not-a-virus:Downloader.Win32.Agent.ajuq
Microsoft Trojan:Win32/Adkuadu!rfn
AhnLab-V3 Trojan/Win32.Gen.C180167
Acronis suspicious
VBA32 Downloader.Agent
Panda Trj/Genetic.gen
ESET-NOD32 a variant of Win32/GMUnpackerInstaller.B potentially unwanted
TrendMicro-HouseCall PUA.Win32.GMUnpack.SM
Tencent Malware.Win32.Gencirc.10b66ba5
Yandex Trojan.Agent!tXiph5Dg1jk
SentinelOne DFI – Suspicious PE
eGambit Unsafe.AI_Score_99%
Fortinet Riskware/Agent
BitDefenderTheta Gen:NN.ZexaF.34100.!qZ@aK3ofuoj
AVG Win32:Malware-gen
Paloalto generic.ml
CrowdStrike win/malicious_confidence_60% (W)
Qihoo-360 Win32/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

Run the setup file.

Run Setup.exe
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 Scanning

Click on “Clean Now”.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

Full version of GridinSoft

If the guide doesn’t help you to remove TrojanDownloader.Agent.A4 you can always ask me in the comments for getting help.

References

    About the author

    Robert Bailey

    Security engineer focused on malware behavior, removal workflows, and Windows hardening. Robert reviews threat articles for practical accuracy, checking detection names, symptoms, and cleanup steps before publication.

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