Written by Robert Bailey

What is Win32/LockScreen.ARQ infection?

In this short article you will discover concerning the meaning of Win32/LockScreen.ARQ as well as its unfavorable impact on your computer. Such ransomware are a type of malware that is elaborated by online fraudulences to demand paying the ransom by a target.

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In the majority of the instances, Win32/LockScreen.ARQ virus will instruct its sufferers to initiate funds move for the function of reducing the effects of the changes that the Trojan infection has presented to the sufferer’s tool.

Win32/LockScreen.ARQ Summary

These modifications can be as adheres to:

  • 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.
  • Unconventionial language used in binary resources: Russian;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Sniffs keystrokes;
  • 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
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the documents located on the target’s hard drive — so the target can no longer make use of the data;
  • 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.


One of the most typical channels whereby Win32/LockScreen.ARQ Ransomware are infused are:

  • By ways of phishing e-mails;
  • As a repercussion of user winding up on a source that hosts a malicious software;

As quickly as the Trojan is efficiently infused, it will either cipher the information on the target’s PC or avoid the tool from operating in an appropriate fashion – while additionally positioning a ransom money note that discusses the requirement for the targets to effect the repayment for the objective of decrypting the documents or bring back the data system back to the preliminary problem. In a lot of instances, the ransom money note will show up when the client reboots the COMPUTER after the system has actually already been harmed.

Win32/LockScreen.ARQ circulation networks.

In numerous edges of the world, Win32/LockScreen.ARQ expands by leaps and also bounds. Nonetheless, the ransom notes and techniques of obtaining the ransom amount might differ relying on specific regional (local) setups. The ransom money notes and tricks of extorting the ransom money amount might differ depending on certain neighborhood (local) settings.

Ransomware injection

As an example:

    Faulty informs regarding unlicensed software.

    In certain areas, the Trojans often wrongfully report having discovered some unlicensed applications allowed on the victim’s gadget. The sharp then requires the individual to pay the ransom money.

    Faulty declarations about unlawful web content.

    In countries where software application piracy is less popular, this method is not as reliable for the cyber frauds. Alternatively, the Win32/LockScreen.ARQ popup alert may wrongly declare to be originating from a police establishment and also will certainly report having situated youngster porn or various other illegal information on the device.

    Win32/LockScreen.ARQ popup alert may incorrectly declare to be obtaining from a regulation enforcement organization as well as will certainly report having situated child porn or various other illegal data on the gadget. The alert will in a similar way contain a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: 660C3E58
md5: bf050bccb5a331b374f6221b6da8de60
name: BF050BCCB5A331B374F6221B6DA8DE60.mlw
sha1: dc463d3d58c0d35cf90d7c93af068173b2f17b7a
sha256: 8fc89eea834901a6d26b464ba508404b92a74b9e07cc47be559ad40cab16de63
sha512: 31c8e897cbf88259d2f93153a17a5a8bcb7a8b84f969b335f92590df8b67ccf228a5f6db7a8aa5e821ade4c08dbd17832e09a08cacb60d1f5b95ac91e9abf0d2
ssdeep: 12288:si1/sRUHiP08EehRI8nr0u6prqHQdvu9of+OzHnr:sykUHisLYrQRLdvuQFr
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/LockScreen.ARQ also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 7000000f1 )
ALYac Gen:Trojan.ShellStartup.MGW@amJcUqec
Zillya Trojan.LockScreen.Win32.2859
BitDefender Gen:Trojan.ShellStartup.MGW@amJcUqec
K7GW Trojan ( 7000000f1 )
Cybereason malicious.cb5a33
BitDefenderTheta AI:Packer.DBB9E32E20
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/LockScreen.ARQ
APEX Malicious
Kaspersky Trojan-Ransom.Win32.Blocker.gfph
Alibaba Ransom:Win32/Blocker.65b5b7bf
NANO-Antivirus Trojan.Win32.MlwGen.bmyauk
MicroWorld-eScan Gen:Trojan.ShellStartup.MGW@amJcUqec
Tencent Win32.Trojan.Blocker.Pgcr
Ad-Aware Gen:Trojan.ShellStartup.MGW@amJcUqec
Sophos Mal/Generic-S
Comodo Malware@#17u5ldws8oayc
DrWeb Trojan.KillProc.23174
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Generic.jc
Emsisoft Gen:Trojan.ShellStartup.MGW@amJcUqec (B)
SentinelOne Static AI – Suspicious PE
eGambit Generic.Malware
Kingsoft Win32.Heur.KVMH005.a.(kcloud)
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm Trojan-Ransom.Win32.Blocker.gfph
GData Gen:Trojan.ShellStartup.MGW@amJcUqec
McAfee Artemis!BF050BCCB5A3
MAX malware (ai score=100)
VBA32 Trojan-Ransom.Winlock.gen
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.GenAsa!C7wzwI/l6tc
Ikarus Trojan.Win32.LockScreen
Fortinet W32/Ransom.IKUI!tr

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

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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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