Win32/LockScreen.ASV

Written by Robert Bailey

What is Win32/LockScreen.ASV infection?

In this article you will locate concerning the definition of Win32/LockScreen.ASV as well as its unfavorable impact on your computer system. Such ransomware are a form of malware that is elaborated by on-line fraudulences to require paying the ransom money by a sufferer.

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Most of the situations, Win32/LockScreen.ASV infection will instruct its sufferers to launch funds move for the purpose of neutralizing the amendments that the Trojan infection has presented to the target’s tool.

Win32/LockScreen.ASV 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.
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • Unconventionial language used in binary resources: Russian;
  • 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.
  • Ciphering the papers found on the victim’s hard drive — so the sufferer can no more make use of the data;
  • Preventing normal accessibility to the victim’s workstation;

Win32/LockScreen.ASV

One of the most regular networks whereby Win32/LockScreen.ASV are injected are:

  • By means of phishing e-mails;
  • As an effect of customer winding up on a source that hosts a destructive software application;

As soon as the Trojan is successfully injected, it will either cipher the data on the sufferer’s PC or stop the device from operating in an appropriate manner – while additionally placing a ransom note that discusses the requirement for the sufferers to effect the payment for the function of decrypting the documents or restoring the file system back to the initial condition. In most instances, the ransom note will certainly come up when the client reboots the PC after the system has already been damaged.

Win32/LockScreen.ASV distribution channels.

In various corners of the world, Win32/LockScreen.ASV expands by jumps and bounds. Nonetheless, the ransom money notes as well as methods of obtaining the ransom money quantity may vary relying on specific neighborhood (regional) setups. The ransom notes as well as methods of extorting the ransom quantity might differ depending on particular local (regional) settings.

Ransomware injection

For example:

    Faulty notifies concerning unlicensed software program.

    In certain locations, the Trojans commonly wrongfully report having actually discovered some unlicensed applications enabled on the sufferer’s device. The sharp then demands the user to pay the ransom money.

    Faulty statements concerning prohibited material.

    In nations where software application piracy is less prominent, this technique is not as reliable for the cyber scams. Additionally, the Win32/LockScreen.ASV popup alert might wrongly claim to be deriving from a law enforcement organization as well as will report having located kid porn or various other prohibited data on the tool.

    Win32/LockScreen.ASV popup alert might falsely claim to be deriving from a regulation enforcement institution as well as will report having located kid porn or other prohibited data on the device. The alert will similarly contain a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: C97D802B
md5: 63970c5530ff10732c67420c41508384
name: 63970C5530FF10732C67420C41508384.mlw
sha1: af844fba9e4507b23682312f6562909cf9c527ae
sha256: 804bdea255b4d15ea9295013b6677c968b97b31743651cafa812498a364948b0
sha512: 94694b65610ad3a415bb734fabb745c5936a239d9e0017bc0105878ac11dcf6f12879e254ffadf926c1d7092560090f06ca56b545e4cebe140c40cd41bd14f72
ssdeep: 24576:4+ez/NFhW/AkVH+gN3nVNWqrlVyIv1TEG36:v6QVeYv9ld1TEG3
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/LockScreen.ASV also known as:

GridinSoft Trojan.Ransom.Gen
DrWeb Trojan.AVKill.23914
Cynet Malicious (score: 100)
ALYac Gen:Trojan.RegistryDisabler.9GW@aGEoAgoI
Cylance Unsafe
Zillya Trojan.Gimemo.Win32.6201
Sangfor Trojan.Win32.Save.a
Alibaba Ransom:Win32/Gimemo.477f56d7
K7GW Trojan ( 004bf8bf1 )
K7AntiVirus Trojan ( 004bf8bf1 )
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/LockScreen.ASV
APEX Malicious
Avast Win32:Trojan-gen
Kaspersky Trojan-Ransom.Win32.Gimemo.azpb
BitDefender Gen:Trojan.RegistryDisabler.9GW@aGEoAgoI
NANO-Antivirus Trojan.Win32.Gimemo.bsjttk
MicroWorld-eScan Gen:Trojan.RegistryDisabler.9GW@aGEoAgoI
Tencent Win32.Trojan.Gimemo.Wogd
Ad-Aware Gen:Trojan.RegistryDisabler.9GW@aGEoAgoI
Sophos Mal/Generic-S
Comodo Malware@#1ws9yau9eetot
BitDefenderTheta AI:Packer.8F8B71BE21
VIPRE Trojan.Win32.Generic!BT
TrendMicro Mal_LockScreen
McAfee-GW-Edition BehavesLike.Win32.Dropper.dh
FireEye Generic.mg.63970c5530ff1073
Emsisoft Gen:Trojan.RegistryDisabler.9GW@aGEoAgoI (B)
Jiangmin Trojan/Gimemo.fyn
Webroot W32.Trojan.Registrydisabler.9gw
Avira HEUR/AGEN.1117464
eGambit Unsafe.AI_Score_100%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Trojan:Win32/Wacatac.B!ml
Arcabit Trojan.RegistryDisabler.E4B518
AegisLab Trojan.Win32.Gimemo.j!c
ZoneAlarm Trojan-Ransom.Win32.Gimemo.azpb
GData Gen:Trojan.RegistryDisabler.9GW@aGEoAgoI
McAfee Artemis!63970C5530FF
MAX malware (ai score=89)
VBA32 TScope.Trojan.Delf
Panda Generic Malware
TrendMicro-HouseCall Mal_LockScreen
Rising Ransom.Gimemo!8.306 (CLOUD)
Yandex Trojan.Gimemo!7ptYiRT7kOU
Ikarus Packed.Win32.Katusha
Fortinet W32/Gimemo.AZPB!tr
AVG Win32:Trojan-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Gimemo.HwUBOBkB

How to remove Win32/LockScreen.ASV 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.ASV 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.ASV 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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