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

What is Win32/ExtenBro.BL infection?

In this article you will find about the interpretation of Win32/ExtenBro.BL and its negative effect on your computer system. Such ransomware are a kind of malware that is elaborated by on the internet frauds to require paying the ransom money by a sufferer.

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Most of the instances, Win32/ExtenBro.BL virus will advise its victims to initiate funds transfer for the objective of counteracting the modifications that the Trojan infection has actually presented to the target’s device.

Win32/ExtenBro.BL Summary

These alterations can be as adheres to:

  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • The executable is compressed using UPX;
  • 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.
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Generates some ICMP traffic;
  • Ciphering the records situated on the victim’s disk drive — so the target can no more utilize the information;
  • Preventing regular access to the target’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/Blocker.686ff948 Ransom:Win32/Blocker.686ff948


The most regular channels where Win32/ExtenBro.BL Ransomware Trojans are infused are:

  • By methods of phishing emails;
  • As an effect of user ending up on a resource that hosts a destructive software application;

As soon as the Trojan is successfully infused, it will either cipher the information on the sufferer’s PC or avoid the tool from operating in a correct manner – while likewise placing a ransom money note that mentions the requirement for the victims to impact the payment for the function of decrypting the documents or recovering the file system back to the first condition. In many circumstances, the ransom note will certainly show up when the client restarts the PC after the system has actually already been harmed.

Win32/ExtenBro.BL circulation channels.

In various edges of the globe, Win32/ExtenBro.BL expands by leaps and bounds. Nevertheless, the ransom money notes and also tricks of obtaining the ransom quantity may differ depending on specific neighborhood (regional) settings. The ransom notes and also techniques of obtaining the ransom quantity might vary depending on specific regional (regional) setups.

Ransomware injection

As an example:

    Faulty signals concerning unlicensed software program.

    In specific areas, the Trojans typically wrongfully report having actually spotted some unlicensed applications allowed on the sufferer’s gadget. The alert then demands the individual to pay the ransom.

    Faulty declarations regarding prohibited web content.

    In nations where software program piracy is much less popular, this approach is not as efficient for the cyber scams. Alternatively, the Win32/ExtenBro.BL popup alert may wrongly assert to be deriving from a law enforcement institution and also will report having situated child pornography or various other unlawful information on the gadget.

    Win32/ExtenBro.BL popup alert may falsely claim to be obtaining from a law enforcement establishment as well as will report having situated kid porn or other prohibited information on the tool. The alert will similarly have a need for the individual to pay the ransom.

Technical details

File Info:

crc32: 3BCB9AD2
md5: d3f321de0ce0e16f99f07d5924f30c9c
name: D3F321DE0CE0E16F99F07D5924F30C9C.mlw
sha1: 29d43bf486d0e4c4aae1a63b9143085a7072bc7c
sha256: 4859e370dfdeb321e1350fb35c13ad8bbc2a6347cc0cce9b523410ef227301aa
sha512: cf5a4a10b8ae52c82f0a51f07d7479d19d334f06f93483e436c16bfcf1bf07aa6875fb36b6cecc50a91807f17a7bdadf3b46db89273558f10f7a517d70996f9e
ssdeep: 12288:/Ov5jKhsfoPA+yeVKUCUxP4C902bdRtJJPi+:/q5TfcdHj4fmbf
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: xa91999-2014 Jonathan Bennett & AutoIt Team
FileDescription: fb_Video_Player_installer
Translation: 0x0809 0x04b0

Win32/ExtenBro.BL also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 004c942e1 )
Cynet Malicious (score: 99)
Cylance Unsafe
Zillya Trojan.Blocker.Win32.40444
Sangfor Trojan.Win32.Nymeria.1162
Alibaba Ransom:Win32/Blocker.686ff948
K7GW Trojan ( 004c942e1 )
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/ExtenBro.BL
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.lfml
NANO-Antivirus Trojan.Win32.Blocker.fioryg
Tencent Win32.Trojan.Blocker.Wtdj
Sophos Mal/Generic-S
BitDefenderTheta AI:Packer.8E277D1617
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.TrojanAitInject.gc
Avira TR/ExtenBro.mayxn
eGambit Unsafe.AI_Score_78%
Microsoft Trojan:Win32/Occamy.C
AegisLab Trojan.Win32.Blocker.4!c
AhnLab-V3 Malware/Win32.Generic.C2738845
McAfee Artemis!D3F321DE0CE0
MAX malware (ai score=99)
Panda Trj/CI.A
Ikarus Trojan.Win32.Extenbro
Fortinet W32/AutoIt.AGE!tr.dldr
AVG Win32:Malware-gen

How to remove Win32/ExtenBro.BL 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 Win32/ExtenBro.BL 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 Win32/ExtenBro.BL you can always ask me in the comments for getting help.

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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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