Win32/LockScreen.YB

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

What is Win32/LockScreen.YB infection?

In this short article you will certainly find regarding the meaning of Win32/LockScreen.YB and its unfavorable effect on your computer system. Such ransomware are a form of malware that is specified by on-line scams to demand paying the ransom money by a sufferer.

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Most of the instances, Win32/LockScreen.YB ransomware will certainly advise its targets to start funds transfer for the function of reducing the effects of the amendments that the Trojan infection has presented to the target’s tool.

Win32/LockScreen.YB Summary

These modifications can be as complies with:

  • 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;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • Performs some HTTP requests;
  • Unconventionial language used in binary resources: Russian;
  • Uses Windows utilities for basic functionality;
  • Installs an hook procedure to monitor for mouse events;
  • Sniffs keystrokes;
  • Attempts to restart the guest VM;
  • 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.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the documents found on the sufferer’s disk drive — so the sufferer can no longer use the information;
  • 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.
Similar behavior
Related domains
z.whorecord.xyzW32/Ransom.E.gen!Eldorado
a.tomx.xyzW32/Ransom.E.gen!Eldorado
redirector.gvt1.comW32/Ransom.E.gen!Eldorado
r8—sn-bpb5oxu-3c2r.gvt1.comW32/Ransom.E.gen!Eldorado
update.googleapis.comW32/Ransom.E.gen!Eldorado

Win32/LockScreen.YB

The most normal channels where Win32/LockScreen.YB Ransomware are infused are:

  • By means of phishing emails;
  • As an effect of customer winding up on a source that holds a malicious software application;

As soon as the Trojan is successfully injected, it will certainly either cipher the data on the sufferer’s computer or avoid the tool from working in a proper way – while likewise positioning a ransom note that mentions the requirement for the targets to effect the settlement for the objective of decrypting the records or bring back the file system back to the first condition. In a lot of instances, the ransom note will show up when the client restarts the COMPUTER after the system has currently been damaged.

Win32/LockScreen.YB circulation channels.

In different edges of the globe, Win32/LockScreen.YB grows by jumps and also bounds. Nevertheless, the ransom money notes and also methods of extorting the ransom money amount may vary depending on certain local (regional) settings. The ransom money notes and methods of extorting the ransom money quantity may vary depending on specific regional (regional) settings.

Ransomware injection

As an example:

    Faulty signals regarding unlicensed software.

    In specific locations, the Trojans frequently wrongfully report having discovered some unlicensed applications enabled on the sufferer’s gadget. The sharp then requires the user to pay the ransom.

    Faulty statements regarding unlawful material.

    In countries where software application piracy is much less prominent, this approach is not as effective for the cyber scams. Additionally, the Win32/LockScreen.YB popup alert may wrongly declare to be originating from a police establishment and also will certainly report having located youngster porn or other unlawful data on the gadget.

    Win32/LockScreen.YB popup alert might falsely claim to be deriving from a regulation enforcement establishment and also will certainly report having situated child pornography or various other prohibited information on the tool. The alert will similarly have a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: CE4AACE8
md5: ec94f3b155556ee26897de77103263d2
name: EC94F3B155556EE26897DE77103263D2.mlw
sha1: bf81e0c07ff12140b9829cd698c6a28cc46ff62e
sha256: 10839eefe6d0b797ffd153687d53908e85eb509fa9011286f7eaa3e7bbe18381
sha512: 2e11e7607cf4d9d8e384e17c3c43f0d1242c2cb60a2d4a32a9d6b9f898905ef79633221546ea9850d00d348cd1ec2d3d4f6e40ccebdef4d30e38571d5f652f17
ssdeep: 768:w5zeX5cUo6Cg43B3KUEf8rKOFwbquxuzdB2jhbhikGyRvED/nUJgiTUA0O6a+s8:kqXoa4VKUrK8ouBB+tikiUJgFs4V
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/LockScreen.YB also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware2
K7AntiVirusTrojan ( 0055e4091 )
Elasticmalicious (high confidence)
DrWebTrojan.MulDrop2.63446
CynetMalicious (score: 100)
ALYacGen:Variant.Ser.Mikey.2065
CylanceUnsafe
ZillyaTrojan.LockScreen.Win32.7236
SangforTrojan.Win32.Save.a
AlibabaTrojan:Win32/LockScreen.52d2af1f
K7GWTrojan ( 0055e4091 )
Cybereasonmalicious.155556
CyrenW32/Ransom.E.gen!Eldorado
SymantecTrojan.Ransomlock.F
ESET-NOD32a variant of Win32/LockScreen.YB
APEXMalicious
AvastWin32:LockScreen-DE [Trj]
KasperskyHEUR:Trojan.Win32.Generic
BitDefenderGen:Variant.Ser.Mikey.2065
NANO-AntivirusTrojan.Win32.HmBlocker.cemlin
MicroWorld-eScanGen:Variant.Ser.Mikey.2065
TencentWin32.Trojan.Lockscreen.Anfo
Ad-AwareGen:Variant.Ser.Mikey.2065
SophosML/PE-A + Mal/EncPk-ZC
ComodoTrojWare.Win32.Trojan.Ransom.~C@465pdo
BitDefenderThetaAI:Packer.94EFE6EE1F
VIPRETrojan.Win32.Generic!BT
McAfee-GW-EditionBehavesLike.Win32.Generic.mm
FireEyeGeneric.mg.ec94f3b155556ee2
EmsisoftGen:Variant.Ser.Mikey.2065 (B)
SentinelOneStatic AI – Malicious PE
JiangminTrojan/HomoBlocker.bk
AviraTR/Dropper.Gen
eGambitUnsafe.AI_Score_99%
Antiy-AVLTrojan/Generic.ASMalwS.9A1B4C
MicrosoftTrojan:Win32/Occamy.C
AegisLabTrojan.Win32.Generic.4!c
GDataGen:Variant.Ser.Mikey.2065
AhnLab-V3Trojan/Win32.HmBlocker.C4096274
McAfeeArtemis!EC94F3B15555
MAXmalware (ai score=100)
VBA32BScope.TrojanPSW.Papras
PandaTrj/CI.A
RisingTrojan.Generic@ML.97 (RDML:0RWCiXUgiC/mjVlnNSTYOw)
YandexTrojan.GenAsa!66ZSSs8h8+Q
IkarusTrojan-Ransom.HmBlocker
MaxSecureTrojan.Malware.300983.susgen
FortinetW32/Agent.XOR!tr
AVGWin32:LockScreen-DE [Trj]
Paloaltogeneric.ml

How to remove Win32/LockScreen.YB ransomware?

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.YB 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.YB 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/comparison

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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