Win32/LockScreen.AFT

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

What is Win32/LockScreen.AFT infection?

In this short article you will certainly discover regarding the definition of Win32/LockScreen.AFT as well as its adverse effect on your computer. Such ransomware are a kind of malware that is clarified by on-line fraudulences to demand paying the ransom by a target.

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Most of the situations, Win32/LockScreen.AFT infection will instruct its sufferers to start funds move for the objective of reducing the effects of the modifications that the Trojan infection has actually presented to the target’s tool.

Win32/LockScreen.AFT 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.
  • A process created a hidden window;
  • 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
  • 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 papers located on the target’s hard drive — so the target 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.

Win32/LockScreen.AFT

One of the most common channels through which Win32/LockScreen.AFT are injected are:

  • By methods of phishing emails;
  • As a consequence of individual winding up on a source that organizes a destructive software;

As quickly as the Trojan is efficiently injected, it will certainly either cipher the data on the target’s PC or stop the gadget from working in a proper way – while likewise putting a ransom money note that discusses the demand for the targets to impact the payment for the purpose of decrypting the papers or bring back the data system back to the preliminary condition. In the majority of circumstances, the ransom note will certainly show up when the client restarts the PC after the system has actually currently been damaged.

Win32/LockScreen.AFT distribution channels.

In different edges of the world, Win32/LockScreen.AFT grows by jumps as well as bounds. Nevertheless, the ransom notes and also methods of extorting the ransom money quantity might differ depending upon certain local (local) setups. The ransom notes and also methods of obtaining the ransom quantity may vary depending on certain local (regional) setups.

Ransomware injection

As an example:

    Faulty notifies about unlicensed software application.

    In specific areas, the Trojans often wrongfully report having identified some unlicensed applications enabled on the target’s tool. The sharp then demands the user to pay the ransom.

    Faulty statements concerning illegal web content.

    In countries where software application piracy is less preferred, this technique is not as efficient for the cyber frauds. Conversely, the Win32/LockScreen.AFT popup alert may incorrectly assert to be stemming from a police organization and will report having situated youngster pornography or various other unlawful information on the tool.

    Win32/LockScreen.AFT popup alert might wrongly assert to be deriving from a regulation enforcement establishment as well as will certainly report having situated youngster pornography or other prohibited data on the gadget. The alert will similarly consist of a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: 6F6EB0AD
md5: 5180d59ea229e4c31135b4da17c28e45
name: 5180D59EA229E4C31135B4DA17C28E45.mlw
sha1: b887fd55a2ce69b452e55db3ed1e84bf8954c94f
sha256: a5e31bf8c2ff8d9c6ffc86f0d8886ce2f0d37e617aec937ea6c27909b0935e6f
sha512: c0be8dcb98e067d0fc10446a010f28d00e35fabd92c22e9751c3094e5b7a978f6a760ecc6ab5ef7893ae8469e5120292b75c94670d0d5e045bec0416857c166e
ssdeep: 6144:TkVcB5YK+DWO4qhlSt9pTdN9f8FNXT/D4Wt93ZSduD5wpvSlw:wV8YK+DWOjmeH/Dxsdkw
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/LockScreen.AFT also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 00235b871 )
Elastic malicious (high confidence)
DrWeb Trojan.Winlock.3256
Cynet Malicious (score: 100)
ALYac Gen:Trojan.ShellStartup.yGW@aCg3nVj
Cylance Unsafe
Zillya Trojan.Gimemo.Win32.531
Sangfor Trojan.Win32.Generic.ky
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Genasom.002070a9
K7GW Trojan ( 00235b871 )
Cybereason malicious.ea229e
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/LockScreen.AFT
APEX Malicious
Avast Win32:Trojan-gen
Kaspersky UDS:Trojan.Win32.Generic
BitDefender Gen:Trojan.ShellStartup.yGW@aCg3nVj
NANO-Antivirus Trojan.Win32.Gimemo.czrvc
MicroWorld-eScan Gen:Trojan.ShellStartup.yGW@aCg3nVj
Tencent Win32.Trojan.Gimemo.Suds
Ad-Aware Gen:Trojan.ShellStartup.yGW@aCg3nVj
Sophos Mal/Generic-S
Comodo Malware@#2kxxlyro3fmb5
BitDefenderTheta AI:Packer.219B17F421
VIPRE Trojan.Win32.Generic!BT
TrendMicro RANSOM_CRYPGENASOM_FE180033.UVPM
McAfee-GW-Edition BehavesLike.Win32.Generic.fh
FireEye Generic.mg.5180d59ea229e4c3
Emsisoft Gen:Trojan.ShellStartup.yGW@aCg3nVj (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan/Regrun.egv
Avira TR/Genasom.njug
eGambit Generic.Malware
Antiy-AVL Trojan/Generic.ASMalwS.EAEC36
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Ransom:Win32/Genasom.DK
Arcabit Trojan.ShellStartup.EA237A
GData Gen:Trojan.ShellStartup.yGW@aCg3nVj
AhnLab-V3 Trojan/Win32.Gimemo.C1959779
McAfee GenericR-HJM!5180D59EA229
MAX malware (ai score=100)
VBA32 TScope.Trojan.Delf
Panda Trj/CI.A
TrendMicro-HouseCall RANSOM_CRYPGENASOM_FE180033.UVPM
Rising [email protected] (RDML:+I0J2VrU1lfQkC7soTkKrQ)
Yandex Trojan.GenAsa!MWir3f/D3aI
Ikarus Trojan.Win32.Ransom
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Generic.AC.271017!tr
AVG Win32:Trojan-gen
Paloalto generic.ml

How to remove Win32/LockScreen.AFT virus?

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.AFT 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.AFT 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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