What is Trojan-Ransom.Win32.Blocker.gzkr infection?

In this short article you will locate regarding the definition of Trojan-Ransom.Win32.Blocker.gzkr and also its negative effect on your computer system. Such ransomware are a form of malware that is elaborated by online frauds to require paying the ransom by a sufferer.

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Most of the cases, Trojan-Ransom.Win32.Blocker.gzkr virus will certainly instruct its victims to start funds transfer for the objective of neutralizing the modifications that the Trojan infection has actually presented to the sufferer’s gadget.

Trojan-Ransom.Win32.Blocker.gzkr 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.
  • 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.
  • Mimics the system’s user agent string for its own requests;
  • 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.

  • A process created a hidden window;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • 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;
  • Sniffs keystrokes;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • A process was set to shut the system down when terminated;
  • 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
  • Exhibits possible ransomware file modification behavior;
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Ciphering the documents situated on the sufferer’s hard drive — so the sufferer can no longer utilize the information. This is the typical behavior of malware known as ransomware that encrypts a victim’s files. The cybercriminal then demands a ransom from the victim to restore access to the data upon payment.
  • Preventing regular access 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.


The most normal networks whereby Trojan-Ransom.Win32.Blocker.gzkr Trojans are injected are:

  • By ways of phishing e-mails;
  • As a repercussion of individual ending up on a source that organizes a malicious software;

As soon as the Trojan is effectively injected, it will either cipher the data on the victim’s PC or prevent the tool from operating in a proper way – while likewise positioning a ransom note that states the demand for the victims to effect the settlement for the purpose of decrypting the documents or recovering the data system back to the preliminary problem. In most instances, the ransom note will certainly turn up when the client restarts the COMPUTER after the system has actually currently been harmed.

Trojan-Ransom.Win32.Blocker.gzkr distribution channels.

In different edges of the world, Trojan-Ransom.Win32.Blocker.gzkr grows by leaps and bounds. Nevertheless, the ransom money notes and also techniques of extorting the ransom amount might vary relying on specific regional (regional) setups. The ransom money notes and techniques of obtaining the ransom amount might differ depending on specific local (regional) settings.

Ransomware injection

As an example:

    Faulty informs about unlicensed software program.

    In specific locations, the Trojans commonly wrongfully report having found some unlicensed applications made it possible for on the victim’s device. The alert after that demands the individual to pay the ransom.

    Faulty statements about illegal web content.

    In nations where software program piracy is less preferred, this method is not as effective for the cyber fraudulences. Conversely, the Trojan-Ransom.Win32.Blocker.gzkr popup alert might falsely declare to be deriving from a law enforcement organization and also will certainly report having located child pornography or other prohibited information on the gadget.

    Trojan-Ransom.Win32.Blocker.gzkr popup alert may wrongly declare to be acquiring from a regulation enforcement institution and also will report having situated child pornography or various other illegal information on the gadget. The alert will similarly contain a need for the customer to pay the ransom money.

Technical details

File Info:

crc32: BDAFEAA1
md5: c1c9d50e8a533e958e28a91c51681355
name: C1C9D50E8A533E958E28A91C51681355.mlw
sha1: a8725167ccfe753e2d10747efcb886c924e66ba2
sha256: cd7ade3a5c625f9238c9321c46eb8fd16056075daf33b8c4228e596a1c1d015a
sha512: 110929a668e65105c2cf11d79c75ec87639e73e186ca45b6fa13b70ac8b5ebe0974f234e82f2e49f5fa5b8288500039500fbf10bf5e82f36b869ddf02afba87f
ssdeep: 3072:drWRuKevnB0zL4pHjXor2CrXYYQnsHcPEzFIgCMSp0YT8I:MeSsor2CDYnnxMzFwpp0RI
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: x5e4x5d7x5d6x261cx266bx261ex2603xdfx5e1x3b1x2666x2708x2663x5e4x266fx5d6x5eaxcdxe1x5e7x5e3x5e9xe8x5e7x5e7x2660x2709x266fx266bx5dd
Assembly Version:
InternalName: xe8x263cx5d2x5df2x5e7xeex5ddx5d2x5d29xe88x5d6xc5xe1x273fx2666xeex5d33x5d6x270cx5e2x5e19xc19x5d15.exe
CompanyName: xedxcaxeexe0x5d6xdfxcex5e7x5e2x270cx5d0x5d3x2708x5dbx5dbx5d5x5dax2193x5ddx5d5xdfx5ddx5d9x5daxe0x5d6x2666x2709x5d6xcd
LegalTrademarks: x266fx5dbx5d6x2665x5d4x26605x5e2x5d0x5d8xecx5d8x263cx5ddxc5x5e4x3b1x5e2x5dfx5d73x5dex2605x5d2x5e4x5dex5e9x266bx2602xed
Comments: x2603xc9x5e8xcdxe0x5d43x266fxc0x5d7x5e4x5e9x5d6x5dfx263cx5dax5e5x27084x5e3xee1xf893x5d1x5d5x266axe7xe1x5e2x5db
ProductName: xeaxcex27148x263cx5d8x5e3x5d8x5d1x5dfx5e190x2640x5d3x5d6x5d5x5ddx26056x2605x5e9xe9x266fx261cx5d1x2663x5e1x5d5x5ea
FileDescription: x5e4x266fx5e7x5e0x5e9xc7x2606x5d9x5dcxe5x2714xca6x5e9xe6x5e7x5e7x5e2x5d2xf893x2665xe0x5d0x270ex5daxc1x2665x5d4x5d7x5d6
OriginalFilename: xe8x263cx5d2x5df2x5e7xeex5ddx5d2x5d29xe88x5d6xc5xe1x273fx2666xeex5d33x5d6x270cx5e2x5e19xc19x5d15.exe

Trojan-Ransom.Win32.Blocker.gzkr also known as:

GridinSoft Trojan.Ransom.Gen
Cynet Malicious (score: 85)
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (W)
Alibaba Ransom:Win32/Blocker.4e006ef2
Cybereason malicious.7ccfe7
APEX Malicious
Avast FileRepMetagen [Malware]
ClamAV Win.Trojan.Bladbindi-1
Kaspersky Trojan-Ransom.Win32.Blocker.gzkr
NANO-Antivirus Trojan.Win32.Blocker.drkbuo
Tencent Win32.Trojan.Blocker.Syht
Sophos ML/PE-A
BitDefenderTheta Gen:NN.ZemsilF.34628.gm0@aSUdhHf
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition Artemis!Trojan
SentinelOne Static AI – Malicious PE
Jiangmin Trojan/Blocker.ngt
Avira HEUR/AGEN.1120354
eGambit Unsafe.AI_Score_99%
Microsoft Backdoor:MSIL/Bladabindi
AhnLab-V3 Malware/Win32.Generic.C425010
McAfee Artemis!C1C9D50E8A53
VBA32 Hoax.Blocker
Rising Ransom.Blocker!8.12A (CLOUD)
Fortinet W32/Blocker.GZKR!tr
AVG FileRepMetagen [Malware]
Qihoo-360 Win32/Trojan.8b1

How to remove Trojan-Ransom.Win32.Blocker.gzkr virus?

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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There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft2.

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-Ransom.Win32.Blocker.gzkr 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-Ransom.Win32.Blocker.gzkr you can always ask me in the comments for getting help.

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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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