Win32/LockScreen.ASF

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

What is Win32/LockScreen.ASF infection?

In this short article you will locate concerning the interpretation of Win32/LockScreen.ASF as well as its unfavorable effect on your computer. Such ransomware are a kind of malware that is clarified by on the internet fraudulences to require paying the ransom by a target.

GridinSoft Anti-Malware Review
It is better to prevent, than repair and repent!
When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
Gridinsoft Anti-Malware 6-day trial available.
EULA | Privacy Policy | 10% Off Coupon
Subscribe to our Telegram channel to be the first to know about news and our exclusive materials on information security.

In the majority of the cases, Win32/LockScreen.ASF virus will certainly instruct its targets to launch funds move for the function of reducing the effects of the amendments that the Trojan infection has introduced to the sufferer’s gadget.

Win32/LockScreen.ASF Summary

These adjustments 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 attempted to delay the analysis task.;
  • Unconventionial language used in binary resources: Russian;
  • 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
  • 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 records situated on the target’s disk drive — so the sufferer can no more make use of 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.

Win32/LockScreen.ASF

The most normal networks where Win32/LockScreen.ASF Ransomware are infused are:

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

As soon as the Trojan is successfully infused, it will either cipher the data on the target’s PC or prevent the gadget from working in a correct way – while also positioning a ransom note that states the need for the victims to effect the repayment for the function of decrypting the records or recovering the documents system back to the preliminary condition. In most instances, the ransom note will show up when the customer restarts the COMPUTER after the system has currently been damaged.

Win32/LockScreen.ASF distribution networks.

In numerous corners of the globe, Win32/LockScreen.ASF grows by jumps and bounds. Nevertheless, the ransom money notes as well as methods of obtaining the ransom money amount might vary depending on certain neighborhood (regional) settings. The ransom money notes as well as tricks of extorting the ransom money quantity might vary depending on specific regional (regional) settings.

Ransomware injection

For example:

    Faulty informs concerning unlicensed software application.

    In specific locations, the Trojans usually wrongfully report having identified some unlicensed applications allowed on the target’s tool. The sharp then requires the individual to pay the ransom money.

    Faulty statements concerning unlawful material.

    In countries where software piracy is less prominent, this method is not as reliable for the cyber frauds. Conversely, the Win32/LockScreen.ASF popup alert might falsely claim to be deriving from a police organization as well as will certainly report having located youngster porn or other illegal data on the device.

    Win32/LockScreen.ASF popup alert may falsely claim to be acquiring from a regulation enforcement establishment as well as will certainly report having situated kid porn or other prohibited information on the device. The alert will in a similar way contain a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: 57812D4F
md5: 82b620a508a35eeac177085a14065fbb
name: 82B620A508A35EEAC177085A14065FBB.mlw
sha1: 73e4f81f51d07b4201803f285a2e10cc77a6cd09
sha256: 75d16fbad7459b3f0e5afbf9b5d154960cb32d1b4ba6049ed5bc1d571beba47f
sha512: 3e6735de7223319e04584d6c908c8f486523fbb093e09ffd21e1676745caa70f62e740bd5fd9c22117865e48168b2f0231e9abe9e17eec3aee15ac72202dc251
ssdeep: 12288:4GXNoSIUEuPj66GrlL+mgbd0cgRPA3iwueA:4QCSd26O1uhylTwO
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/LockScreen.ASF also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 0055e4091 )
Elastic malicious (high confidence)
DrWeb Trojan.KillProc.23006
Cynet Malicious (score: 99)
CAT-QuickHeal Trojan.Dynamer.26655
ALYac Gen:Trojan.ShellStartup.GGW@amkWoHnc
Cylance Unsafe
Zillya Trojan.HmBlocker.Win32.3867
Sangfor Trojan.Win32.Save.a
Alibaba Ransom:Win32/HmBlocker.b1f9c536
K7GW Trojan ( 0055e4091 )
Cybereason malicious.508a35
Baidu Win32.Trojan.LockScreen.bj
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/LockScreen.ASF
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Trojan.Agent-1178511
Kaspersky Trojan-Ransom.Win32.HmBlocker.nyty
BitDefender Gen:Trojan.ShellStartup.GGW@amkWoHnc
NANO-Antivirus Trojan.Win32.HmBlocker.brmegj
SUPERAntiSpyware Trojan.Agent/Gen-HmBlocker
MicroWorld-eScan Gen:Trojan.ShellStartup.GGW@amkWoHnc
Tencent Malware.Win32.Gencirc.10b3d782
Ad-Aware Gen:Trojan.ShellStartup.GGW@amkWoHnc
Sophos Mal/Generic-S
Comodo Malware@#m39wr6c9dc4q
BitDefenderTheta AI:Packer.FE07DC8B20
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition GenericR-APD!82B620A508A3
FireEye Generic.mg.82b620a508a35eea
Emsisoft Gen:Trojan.ShellStartup.GGW@amkWoHnc (B)
Jiangmin Trojan/HmBlocker.cma
Avira TR/Rogue.8898995.1
eGambit Unsafe.AI_Score_99%
Antiy-AVL Trojan[Ransom]/Win32.HmBlocker
Microsoft Backdoor:Win32/Bladabindi!ml
Arcabit Trojan.ShellStartup.E3DCB8
GData Gen:Trojan.ShellStartup.GGW@amkWoHnc
AhnLab-V3 Trojan/Win32.HmBlocker.R66949
McAfee GenericR-APD!82B620A508A3
MAX malware (ai score=100)
VBA32 Hoax.HmBlocker
Panda Trj/CI.A
Rising Ransom.HmBlocker!8.2A63 (CLOUD)
Ikarus Trojan.SuspectCRC
MaxSecure Trojan.Malware.5532116.susgen
Fortinet W32/LockScreen.ASF!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Generic.HwUBEpsA

How to remove Win32/LockScreen.ASF 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.ASF 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Win32/LockScreen.ASF you can always ask me in the comments for getting help.

Sending
User Review
0 (0 votes)
Comments Rating 0 (0 reviews)

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.

Leave a Reply

Sending