Written by Robert Bailey

What is Win32/LockScreen.GZ infection?

In this short article you will discover about the meaning of Win32/LockScreen.GZ and its adverse impact on your computer system. Such ransomware are a kind of malware that is clarified by on the internet fraudulences to demand paying the ransom by a target.

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Most of the instances, Win32/LockScreen.GZ virus will advise its targets to start funds transfer for the purpose of neutralizing the modifications that the Trojan infection has actually presented to the victim’s gadget.

Win32/LockScreen.GZ 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.
  • Expresses interest in specific running processes;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • Uses Windows utilities for basic functionality;
  • 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
  • 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.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the victim’s disk drive — so the target can no longer utilize the information;
  • Preventing routine accessibility 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


The most regular networks whereby Win32/LockScreen.GZ Ransomware Trojans are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As an effect of customer winding up on a source that organizes a harmful software program;

As quickly as the Trojan is efficiently infused, it will certainly either cipher the information on the target’s PC or protect against the tool from working in an appropriate fashion – while additionally positioning a ransom money note that discusses the need for the victims to impact the payment for the function of decrypting the files or bring back the data system back to the initial problem. In many instances, the ransom money note will show up when the customer reboots the PC after the system has already been harmed.

Win32/LockScreen.GZ circulation networks.

In various edges of the world, Win32/LockScreen.GZ expands by leaps and bounds. Nevertheless, the ransom notes as well as tricks of extorting the ransom money quantity may vary depending upon particular local (local) settings. The ransom money notes as well as techniques of obtaining the ransom money quantity may differ depending on particular regional (local) settings.

Ransomware injection

As an example:

    Faulty notifies concerning unlicensed software.

    In specific areas, the Trojans frequently wrongfully report having discovered some unlicensed applications made it possible for on the victim’s gadget. The alert then demands the customer to pay the ransom.

    Faulty declarations regarding illegal content.

    In countries where software application piracy is much less popular, this approach is not as effective for the cyber scams. Conversely, the Win32/LockScreen.GZ popup alert may wrongly assert to be originating from a police institution and will certainly report having situated kid porn or various other illegal data on the tool.

    Win32/LockScreen.GZ popup alert may wrongly claim to be deriving from a legislation enforcement organization and also will report having situated youngster porn or various other prohibited data on the device. The alert will similarly include a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: D91411C1
md5: 7100c99ba42c9d5d048b3b307ed9e85b
name: 7100C99BA42C9D5D048B3B307ED9E85B.mlw
sha1: fe5a3c13ca29a32538be05128c55a15d739999e4
sha256: 96572d68bf6395a0cffb3c1fcdba0f5ba5e810dd5a48788bcebac16f31756a6b
sha512: 042d2f135b5e5962ca0167a4a9947a33cf3ff16a9cb1ea5940203d56f43b15cbb676861c941508ae66db15a741e6edd1775b87e0cda9cbea86ce162e1f73adf9
ssdeep: 192:o1pq2yJvh1ugnYFZM6hFiZFAS8BcO3A0mBpN8TdXG5CaJwsNoSt7:obhch1ugnYFZsOc0mrN8ThG5C8wSjt7
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Translation: 0x0409 0x04b0

Win32/LockScreen.GZ also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0055e4091 )
Elastic malicious (high confidence)
DrWeb Trojan.KillProc.41511
Cynet Malicious (score: 100)
ALYac Gen:Trojan.Heur.VP.bm0@auddz2bi
Cylance Unsafe
Zillya Trojan.LockScreen.Win32.8385
Sangfor Trojan.Win32.SMSer.F
CrowdStrike win/malicious_confidence_70% (D)
Alibaba Trojan:Win32/Fullscreen.1f795126
K7GW Trojan ( 0055e4091 )
Cybereason malicious.ba42c9
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/LockScreen.GZ
APEX Malicious
Avast Win32:Malware-gen
BitDefender Gen:Trojan.Heur.VP.bm0@auddz2bi
NANO-Antivirus Trojan.Win32.LockScreen.ecjcdt
MicroWorld-eScan Gen:Trojan.Heur.VP.bm0@auddz2bi
Tencent Win32.Trojan.Fullscreen.Adae
Ad-Aware Gen:Trojan.Heur.VP.bm0@auddz2bi
Sophos Mal/Generic-S
Comodo TrojWare.Win32.Autorun.JT@4zqndt
BitDefenderTheta AI:Packer.5A828F591F
VIPRE Trojan.Win32.Generic.pak!cobra
Emsisoft Gen:Trojan.Heur.VP.bm0@auddz2bi (B)
Jiangmin Trojan.Fullscreen.h
Avira HEUR/AGEN.1125779
eGambit Generic.Malware
Microsoft Trojan:Win32/SMSer.F
AegisLab Trojan.Win32.Fullscreen.j!c
GData Gen:Trojan.Heur.VP.bm0@auddz2bi
AhnLab-V3 Trojan/Win32.HDC.C88505
McAfee GenericRXAA-AA!7100C99BA42C
MAX malware (ai score=100)
VBA32 Trojan.VB.Winlock
Panda Trj/GdSda.A
TrendMicro-HouseCall TROJ_RANSVB.SMA
Rising Ransom.Fullscreen!8.5C6D (CLOUD)
Yandex Trojan.GenAsa!fejf+jq0aGw
SentinelOne Static AI – Suspicious PE
Fortinet W32/LockScreen.CH!tr.ransom
AVG Win32:Malware-gen

How to remove Win32/LockScreen.GZ virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
Reasons why I would recommend GridinSoft1

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/LockScreen.GZ 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/LockScreen.GZ 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

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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