Win32/LockScreen.YD

What is Win32/LockScreen.YD infection?

In this article you will certainly locate concerning the definition of Win32/LockScreen.YD as well as its adverse effect on your computer system. Such ransomware are a form of malware that is specified by on the internet scams to demand paying the ransom money by a target.

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Most of the instances, Win32/LockScreen.YD infection will instruct its targets to initiate funds move for the purpose of neutralizing the changes that the Trojan infection has actually introduced to the sufferer’s tool.

Win32/LockScreen.YD Summary

These alterations 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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: Arabic (Kuwait);
  • 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;
  • Executed a process and injected code into it, probably while unpacking;
  • A process attempted to delay the analysis task by a long amount of time.;
  • 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
  • Writes a potential ransom message to disk;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Ciphering the papers situated on the victim’s disk drive — so the target can no longer use the data;
  • Preventing normal 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.

Win32/LockScreen.YD

One of the most normal channels whereby Win32/LockScreen.YD Ransomware are injected are:

  • By means of phishing e-mails;
  • As a consequence of customer winding up on a resource that holds a malicious software application;

As quickly as the Trojan is efficiently injected, it will certainly either cipher the data on the target’s computer or stop the tool from working in a proper way – while likewise putting a ransom note that discusses the demand for the sufferers to effect the repayment for the objective of decrypting the files or recovering the file system back to the initial problem. In a lot of circumstances, the ransom money note will certainly show up when the customer restarts the COMPUTER after the system has already been damaged.

Win32/LockScreen.YD distribution channels.

In different corners of the world, Win32/LockScreen.YD grows by leaps as well as bounds. However, the ransom money notes as well as methods of obtaining the ransom quantity might vary relying on specific regional (local) setups. The ransom money notes and techniques of extorting the ransom money amount may differ depending on particular local (local) setups.

Ransomware injection

For example:

    Faulty notifies concerning unlicensed software program.

    In particular areas, the Trojans frequently wrongfully report having actually discovered some unlicensed applications made it possible for on the target’s tool. The sharp then requires the individual to pay the ransom.

    Faulty statements regarding illegal content.

    In nations where software application piracy is less popular, this approach is not as reliable for the cyber frauds. Alternatively, the Win32/LockScreen.YD popup alert may incorrectly assert to be stemming from a police establishment and also will certainly report having located child pornography or other illegal data on the tool.

    Win32/LockScreen.YD popup alert may wrongly declare to be deriving from a law enforcement establishment and also will certainly report having situated kid porn or various other illegal information on the device. The alert will in a similar way contain a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: E6ADD3D8
md5: fa10dcb984a45b35c46aba80698366ad
name: FA10DCB984A45B35C46ABA80698366AD.mlw
sha1: 1497aa5ae99220d5043a48318211d5e32a958b39
sha256: 0b8b5267fe7a6feee5f874054f5b3845f4b6e8b54ca13992d930bd2fe29a3bc5
sha512: b0ea2d82f4cf6fd43221d0c86448d3b5bc39165c6e5065873e23e544937ea59a4f7826443787228cd7aa7ba1319179ad74a52b7726e88cd78b30ee92d699200f
ssdeep: 3072:W9Lyeu5a7zgFczzGRlOwR3THxLmb/k/XMI1EYW2sRfHP:75SzhviZbxLcPNj2s
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: Russo Montreal Alexei Bragg Goldstin Elinor Scotty Chao Cobb
InternalName: toch
FileVersion: 3.08.00031
CompanyName: EsmarkLoireGermanicCherylTuscaloosaGullah Endicott DwightTruk Rutland
Comments: PlutoDanteCaesarian Conner VivaldiTempletonBernard Nehru
ProductName: Grendel EdinburghConstantine Pompeii Rafael BroadwayHawleyHeckmanHansenHesperus
ProductVersion: 3.08.00031
FileDescription: StanleyStevenDobbs AlfonsoWilfredAnnalenStephanie MaxineBathurst
OriginalFilename: toch.exe
Translation: 0x0409 0x04b0

Win32/LockScreen.YD also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0055e4091 )
DrWeb Trojan.Winlock.4233
Cynet Malicious (score: 100)
ALYac Gen:Variant.Barys.5646
Cylance Unsafe
Zillya Trojan.LockScreen.Win32.7967
Sangfor Trojan.Win32.Save.a
Alibaba Ransom:Win32/FSWarning.0a1a4bc3
K7GW Trojan ( 0055e4091 )
Cybereason malicious.984a45
Cyren W32/Trojan.EPZC-7401
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/LockScreen.YD
APEX Malicious
Avast FileRepMalware
ClamAV Win.Trojan.Fswarning-7455522-0
Kaspersky Trojan-Ransom.Win32.FSWarning.dh
BitDefender Gen:Variant.Barys.5646
NANO-Antivirus Trojan.Win32.Winlock.ebybkz
MicroWorld-eScan Gen:Variant.Barys.5646
Tencent Win32.Trojan.Fswarning.Ecjo
Ad-Aware Gen:Variant.Barys.5646
Sophos Troj/VB-FOQ
Comodo Malware@#2fct7jlj8fwtq
BitDefenderTheta Gen:NN.ZevbaF.34670.kmKfaKQg4yhG
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Trojan.ch
FireEye Generic.mg.fa10dcb984a45b35
Emsisoft Gen:Variant.Barys.5646 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan.FSWarning.d
Webroot W32.Trojan.Gen
Avira HEUR/AGEN.1115919
eGambit Generic.Malware
Microsoft Trojan:Win32/Occamy.C
ZoneAlarm Trojan-Ransom.Win32.FSWarning.dh
GData Gen:Variant.Barys.5646
AhnLab-V3 Trojan/Win32.HDC.C103410
McAfee Artemis!FA10DCB984A4
MAX malware (ai score=100)
VBA32 BScope.Trojan.VBKrypt
Malwarebytes Malware.Heuristic.1003
Panda Generic Malware
Rising Ransom.FSWarning!8.5CFE (CLOUD)
Yandex Trojan.LockScreen!lWgQIDI2cII
Ikarus Virus.Win32.Injector
Fortinet W32/FSWarning.DH!tr
AVG FileRepMalware
Qihoo-360 Win32/Trojan.Inject.HgAASRwA

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

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/products/

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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