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

What is Trojan:MSIL/Lockscreen.C!bit infection?

In this post you will certainly find about the interpretation of Trojan:MSIL/Lockscreen.C!bit and also its unfavorable impact on your computer system. Such ransomware are a type of malware that is elaborated by online frauds to demand paying the ransom by a sufferer.

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Most of the cases, Trojan:MSIL/Lockscreen.C!bit virus will advise its victims to launch funds move for the function of counteracting the modifications that the Trojan infection has actually presented to the target’s device.

Trojan:MSIL/Lockscreen.C!bit Summary

These adjustments can be as adheres to:

  • 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.
  • A process created a hidden window;
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • Uses Windows utilities for basic functionality;
  • Attempts to restart the guest VM;
  • Modifies boot configuration settings;
  • 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 copy of itself;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the records found on the target’s hard drive — so the victim can no longer make use of the information;
  • Preventing normal 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.
Similar behavior
Related domains Ransom.BrLock Ransom.BrLock
r8— Ransom.BrLock Ransom.BrLock


The most typical channels where Trojan:MSIL/Lockscreen.C!bit Ransomware are injected are:

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

As soon as the Trojan is effectively infused, it will certainly either cipher the data on the sufferer’s computer or avoid the device from operating in a proper way – while likewise putting a ransom money note that points out the requirement for the sufferers to effect the settlement for the function of decrypting the records or recovering the documents system back to the first problem. In many instances, the ransom money note will turn up when the client reboots the PC after the system has actually currently been harmed.

Trojan:MSIL/Lockscreen.C!bit circulation channels.

In numerous edges of the world, Trojan:MSIL/Lockscreen.C!bit grows by leaps and bounds. Nonetheless, the ransom money notes as well as techniques of obtaining the ransom money amount might differ depending on particular neighborhood (regional) settings. The ransom money notes and also methods of obtaining the ransom money quantity might differ depending on specific local (local) settings.

Ransomware injection

For example:

    Faulty informs about unlicensed software.

    In specific locations, the Trojans commonly wrongfully report having detected some unlicensed applications allowed on the target’s device. The sharp then demands the user to pay the ransom.

    Faulty declarations regarding unlawful content.

    In countries where software program piracy is less popular, this method is not as efficient for the cyber fraudulences. Additionally, the Trojan:MSIL/Lockscreen.C!bit popup alert might incorrectly assert to be deriving from a law enforcement institution and will report having situated kid pornography or various other prohibited data on the device.

    Trojan:MSIL/Lockscreen.C!bit popup alert might wrongly declare to be obtaining from a legislation enforcement institution and will certainly report having located child pornography or other prohibited information on the gadget. The alert will similarly consist of a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: 92303B23
md5: 9b2ba31bb3316288183ad271c5687e34
name: 9B2BA31BB3316288183AD271C5687E34.mlw
sha1: f9645de7dba8cfdb46c8afcdf9229ec8bf5e18c1
sha256: 10c350299b99016c593fdddfa704adac46f941aa1d736151119f1cd76fcb5b0a
sha512: 13bfef4e330030beaae53190954f214b5f7d378786533caa0de2b1d600c0df68f16449ca66344ea52e86e537ba9c25257aea1c579e33c9026a0b0d8c79e68aa8
ssdeep: 1536:pGlgvcvtYwOD+vqE31T3r1bW1GU5Vqtn:pGlgvcvtdu+vqE3hr1bAjq
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 JavaTM 2015
Assembly Version:
InternalName: JavaTM.exe
ProductName: JavaTM
FileDescription: JavaTM
OriginalFilename: JavaTM.exe

Trojan:MSIL/Lockscreen.C!bit also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 004e2d221 )
Elastic malicious (high confidence)
DrWeb Trojan.KillProc.38402
Cynet Malicious (score: 99)
CAT-QuickHeal Trojan.LockScreen.A3
ALYac Gen:Variant.MSILPerseus.26238
Cylance Unsafe
Zillya Trojan.Blocker.Win32.33995
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_70% (D)
K7GW Trojan ( 004e2d221 )
Cybereason malicious.bb3316
Cyren W32/S-c17d2fee!Eldorado
Symantec Ransom.BrLock
ESET-NOD32 a variant of MSIL/LockScreen.PG
APEX Malicious
Avast Win32:Malware-gen
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.MSILPerseus.26238
NANO-Antivirus Trojan.Win32.LockScreen.ebpfmi
MicroWorld-eScan Gen:Variant.MSILPerseus.26238
Ad-Aware Gen:Variant.MSILPerseus.26238
Sophos Mal/Generic-S + Mal/BrLock-A
BitDefenderTheta Gen:NN.ZemsilF.34738.gm0@au5Fpdp
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_BRLOCK.SM
McAfee-GW-Edition Artemis!Trojan
Emsisoft Gen:Variant.MSILPerseus.26238 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Blocker.chj
Webroot W32.Malware.Gen
Avira HEUR/AGEN.1127555
eGambit Unsafe.AI_Score_99%
Antiy-AVL Trojan/Generic.ASMalwS.180DADA
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Trojan:MSIL/Lockscreen.C!bit
AegisLab Trojan.Win32.Blocker.j!c
GData MSIL.Trojan-Ransom.BrLock.A
AhnLab-V3 Trojan/Win32.Dynamer.R181171
McAfee Artemis!9B2BA31BB331
MAX malware (ai score=97)
Malwarebytes Ransom.BrowserModifier
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom_BRLOCK.SM
Ikarus Trojan.MSIL.LockScreen
MaxSecure Trojan.Malware.300983.susgen
Fortinet MSIL/LockScreen.PG!tr
AVG Win32:Malware-gen

How to remove Trojan:MSIL/Lockscreen.C!bit 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:MSIL/Lockscreen.C!bit 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:MSIL/Lockscreen.C!bit 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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