Trojan-Ransom.Win32.Blocker.lfch

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

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

In this post you will locate regarding the interpretation of Trojan-Ransom.Win32.Blocker.lfch and its unfavorable influence on your computer system. Such ransomware are a kind of malware that is clarified by online fraudulences to demand paying the ransom by a sufferer.

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Most of the cases, Trojan-Ransom.Win32.Blocker.lfch ransomware will certainly instruct its targets to start funds move for the objective of counteracting the changes that the Trojan infection has actually presented to the sufferer’s tool.

Trojan-Ransom.Win32.Blocker.lfch Summary

These adjustments 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 with CreateRemoteThread in a remote process;
  • 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 attempted to delay the analysis task.;
  • 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.

  • 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.
  • Uses Windows utilities for basic functionality;
  • Queries information on disks, possibly for anti-virtualization. Since VMs share the same disk space so it is expected that they won’t be getting as much space as an application running on
    native hardware will have access to.
  • Checks for the presence of known windows from debuggers and forensic tools;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • 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
  • 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.
  • Checks for the presence of known devices from debuggers and forensic tools;
  • Checks the version of Bios, possibly for anti-virtualization;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Detected Armadillo packer using a known mutex;
  • Detected Armadillo packer using a known registry key;
  • Attempts to interact with an Alternate Data Stream (ADS);
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers located on the target’s hard drive — so the target can no more utilize the data;
  • Preventing normal accessibility to the victim’s workstation;

Trojan-Ransom.Win32.Blocker.lfch

One of the most regular channels whereby Trojan-Ransom.Win32.Blocker.lfch are infused are:

  • By ways of phishing e-mails;
  • As a consequence of customer ending up on a resource that organizes a destructive software application;

As soon as the Trojan is effectively infused, it will certainly either cipher the data on the target’s PC or protect against the tool from working in a proper manner – while likewise putting a ransom note that mentions the need for the victims to impact the payment for the purpose of decrypting the files or restoring the documents system back to the initial condition. In most circumstances, the ransom money note will certainly come up when the client reboots the COMPUTER after the system has actually already been harmed.

Trojan-Ransom.Win32.Blocker.lfch circulation channels.

In various corners of the globe, Trojan-Ransom.Win32.Blocker.lfch expands by leaps and bounds. Nonetheless, the ransom notes as well as techniques of obtaining the ransom money amount may differ depending upon particular neighborhood (local) setups. The ransom money notes and also methods of extorting the ransom money quantity may differ depending on particular neighborhood (regional) setups.

Ransomware injection

As an example:

    Faulty informs concerning unlicensed software.

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

    Faulty declarations about prohibited web content.

    In nations where software application piracy is much less preferred, this technique is not as effective for the cyber fraudulences. Additionally, the Trojan-Ransom.Win32.Blocker.lfch popup alert may falsely declare to be stemming from a police organization and also will certainly report having situated youngster porn or other illegal data on the tool.

    Trojan-Ransom.Win32.Blocker.lfch popup alert might incorrectly declare to be acquiring from a regulation enforcement organization and also will report having situated kid porn or other prohibited information on the tool. The alert will likewise consist of a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: B919D5FF
md5: bcfce3c51b8d53b073aa8529b6bf6514
name: BCFCE3C51B8D53B073AA8529B6BF6514.mlw
sha1: 1239b178b5555327e1d5fcc1059adaf0fed13782
sha256: 7c0c0495a74cf67fd302f47b0ee9c794d07d83e88d2deeecf91bbdaf351c4ff5
sha512: 5fb84682451e2c372d95f5060ad967df6f3b33ea9be7a8574264f89e42e0ceed1a507b64c1db7da284be3db52d2337be6ad32bc0b9f74b41352dc2ad77715fd9
ssdeep: 24576:HxnaFGyihlK0nGFrvHV1bRF54bCY2dLZuIPQ0TK582h8fKvARTDgAtGPdkS3rJQa:RaB7/rSbCBt1Q0m5IASTDjGFinXBgJ
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright:
FileVersion: 3.1.1.36
CompanyName: GiMeSpace
Comments: This installation was built with Inno Setup.
ProductName: GiMeSpace Desktop Extender 3D
ProductVersion: 3.1.1.36
FileDescription: GiMeSpace Desktop Extender 3D Setup
Translation: 0x0000 0x04b0

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

GridinSoftTrojan.Ransom.Gen
K7AntiVirusRiskware ( 0040eff71 )
CylanceUnsafe
K7GWRiskware ( 0040eff71 )
KasperskyTrojan-Ransom.Win32.Blocker.lfch
AlibabaRansom:Win32/Blocker.f7c507ba
SophosGeneric PUA BC (PUA)
McAfee-GW-EditionArtemis!Trojan
MicrosoftPUA:Win32/Presenoker
AegisLabTrojan.Win32.Blocker.4!c
TACHYONRansom/W32.Blocker.1636120
McAfeeArtemis!BCFCE3C51B8D
FortinetW32/Blocker.LFCH!tr
Qihoo-360Win32/Trojan.Ransom.f3f

How to remove Trojan-Ransom.Win32.Blocker.lfch 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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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.lfch 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.lfch 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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