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

What is MSIL/LockScreen.BT infection?

In this article you will certainly locate regarding the interpretation of MSIL/LockScreen.BT and also its unfavorable influence on your computer. Such ransomware are a form of malware that is specified by on-line scams to demand paying the ransom money by a target.

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Most of the instances, MSIL/LockScreen.BT ransomware will certainly instruct its sufferers to launch funds transfer for the function of neutralizing the changes that the Trojan infection has presented to the target’s tool.

MSIL/LockScreen.BT Summary

These adjustments 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.
  • 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.

  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Ciphering the papers situated on the victim’s disk drive — so the sufferer can no more use the information;
  • Preventing routine access to the victim’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.


One of the most regular channels where MSIL/LockScreen.BT are infused are:

  • By means of phishing emails;
  • As a repercussion of customer winding up on a source that organizes a harmful software program;

As quickly as the Trojan is successfully infused, it will either cipher the data on the victim’s PC or avoid the device from working in an appropriate way – while additionally putting a ransom money note that mentions the demand for the sufferers to effect the settlement for the objective of decrypting the files or bring back the file system back to the preliminary problem. In many instances, the ransom note will certainly come up when the client restarts the COMPUTER after the system has already been harmed.

MSIL/LockScreen.BT circulation networks.

In different edges of the world, MSIL/LockScreen.BT expands by jumps as well as bounds. However, the ransom notes and also techniques of obtaining the ransom money quantity may vary depending upon specific neighborhood (regional) settings. The ransom notes and techniques of obtaining the ransom money quantity might differ depending on certain regional (local) setups.

Ransomware injection

For instance:

    Faulty alerts about unlicensed software.

    In specific areas, the Trojans often wrongfully report having actually spotted some unlicensed applications made it possible for on the sufferer’s tool. The sharp after that requires the customer to pay the ransom money.

    Faulty declarations regarding prohibited content.

    In countries where software program piracy is less prominent, this approach is not as efficient for the cyber scams. Alternatively, the MSIL/LockScreen.BT popup alert may incorrectly assert to be stemming from a law enforcement organization and will certainly report having located kid porn or various other prohibited data on the tool.

    MSIL/LockScreen.BT popup alert might falsely claim to be obtaining from a regulation enforcement establishment and also will report having situated kid pornography or various other prohibited data on the tool. The alert will in a similar way have a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: 1EA4ECD8
md5: 5889be0bd65a72b299b11d8e88eb6739
name: 5889BE0BD65A72B299B11D8E88EB6739.mlw
sha1: 3bb10bb99f03e8897345ffcdc1b5fa513779418f
sha256: a22c18204508f3c99243464c53f1e90dd8ec88589649fa40cbcb517f83992ece
sha512: 481057738b08ed9c9d87a22ac8a382b6ce22de42da77bd1e33d9d71cf65d03964822fc11c5e0ae36ae2bc407e408e9991a3a084c7a3675ea8c0acb413b6fec74
ssdeep: 6144:1SOuQHSKVZVbg+qRwuHQHhGUn/1HVr/EE4Gh:1SONbVQOwqd1rnz
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: RTD Soft
Assembly Version:
InternalName: slender.exe
CompanyName: RTD Soft
LegalTrademarks: RTD Soft
Comments: seo mon
ProductName: real tool
FileDescription: real tool
OriginalFilename: slender.exe

MSIL/LockScreen.BT also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 004cb1481 )
DrWeb Trojan.KillProc.19846
Cynet Malicious (score: 99)
McAfee GenericRXDR-GB!5889BE0BD65A
Cylance Unsafe
Sangfor Trojan.Win32.Kazy.106674
CrowdStrike win/malicious_confidence_60% (D)
K7GW Trojan ( 004cb1481 )
Cybereason malicious.bd65a7
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast MSIL:LockScreen-H [Trj]
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.MSILPerseus.26960
NANO-Antivirus Trojan.Win32.Blocker.bbjncj
ViRobot Trojan.Win32.A.Blocker.282624.A
MicroWorld-eScan Gen:Variant.MSILPerseus.26960
Tencent Win32.Trojan.Blocker.Swuz
Ad-Aware Gen:Variant.MSILPerseus.26960
Comodo Malware@#i4f2d8rrh5is
BitDefenderTheta Gen:NN.ZemsilF.34692.rq0@ay9minp
VIPRE Trojan.Win32.Generic!BT
Emsisoft Gen:Variant.MSILPerseus.26960 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan/
Webroot W32.Malware.Heur
Avira HEUR/AGEN.1101818
Microsoft Trojan:MSIL/Racierom.A
AegisLab Trojan.Win32.Blocker.j!c
GData Gen:Variant.MSILPerseus.26960
AhnLab-V3 Trojan/Win32.LockScreen.C2318146
VBA32 Hoax.Blocker
MAX malware (ai score=83)
Panda Generic Malware
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.Barys!e/SUnI6gRTw
Ikarus Trojan-Ransom.Blocker
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Blocker.BT!tr
AVG MSIL:LockScreen-H [Trj]

How to remove MSIL/LockScreen.BT 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 MSIL/LockScreen.BT 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 MSIL/LockScreen.BT you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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