Win32/LockScreen.AHM

What is Win32/LockScreen.AHM infection?

In this post you will certainly locate concerning the definition of Win32/LockScreen.AHM and its adverse effect on your computer. Such ransomware are a form of malware that is elaborated by online frauds to demand paying the ransom by a victim.

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In the majority of the cases, Win32/LockScreen.AHM virus will certainly instruct its sufferers to initiate funds move for the function of reducing the effects of the changes that the Trojan infection has presented to the target’s device.

Win32/LockScreen.AHM Summary

These adjustments 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.
  • 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.
  • 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;
  • 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
  • Ciphering the records situated on the victim’s hard drive — so the victim can no more use the information;
  • Preventing routine 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.AHM

The most typical networks whereby Win32/LockScreen.AHM Ransomware Trojans are injected are:

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

As quickly as the Trojan is successfully injected, it will certainly either cipher the data on the target’s PC or stop the gadget from functioning in a proper fashion – while also positioning a ransom money note that discusses the requirement for the victims to effect the repayment for the function of decrypting the papers or restoring the data system back to the preliminary condition. In many instances, the ransom money note will turn up when the client restarts the COMPUTER after the system has actually currently been harmed.

Win32/LockScreen.AHM distribution networks.

In numerous corners of the world, Win32/LockScreen.AHM expands by jumps as well as bounds. Nonetheless, the ransom money notes and also methods of extorting the ransom quantity might vary depending upon specific neighborhood (local) settings. The ransom notes as well as methods of extorting the ransom amount may differ depending on particular local (regional) settings.

Ransomware injection

For instance:

    Faulty alerts about unlicensed software program.

    In specific areas, the Trojans often wrongfully report having detected some unlicensed applications made it possible for on the target’s device. The alert after that requires the user to pay the ransom money.

    Faulty declarations regarding illegal material.

    In nations where software application piracy is much less popular, this technique is not as efficient for the cyber fraudulences. Additionally, the Win32/LockScreen.AHM popup alert might falsely declare to be originating from a police organization as well as will certainly report having situated youngster porn or various other unlawful information on the gadget.

    Win32/LockScreen.AHM popup alert might wrongly assert to be acquiring from a regulation enforcement institution and also will report having situated child porn or various other prohibited data on the device. The alert will similarly include a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: 8FC59C02
md5: 099923485f53b520947293618cb13ba9
name: 099923485F53B520947293618CB13BA9.mlw
sha1: f850ef71f85a38758f24acb0563e35b235b19f4a
sha256: ca77f739f23423fc177f33a5b0af93b17d08d421e5189edcddb2cdc561c14f8a
sha512: 7efdde1b70a43aebba7c1fc10df3dea40e05ad9c514cfedc55881e7c1700ecf0076782fcdf16a9fe2278773d8186d49e9dd82bea8f25449b285636c595d52550
ssdeep: 1536:leMDn/a8bM3kDN4jCIwO+fT77BTHZJla6ifi9woC9DlHSMn49Eb2eGF:leeiZMN4+IwO+fzBT5Jg6i+wHDHSM49
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

0: [No Data]

Win32/LockScreen.AHM also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 0055e4091 )
Elastic malicious (high confidence)
DrWeb Trojan.Siggen2.47853
Cynet Malicious (score: 100)
ALYac Gen:Variant.Symmi.86576
Cylance Unsafe
Zillya Trojan.ChameleonUnlicence.Win32.1
Sangfor Trojan.Win32.Save.a
Alibaba Ransom:Win32/Obfuscator.7db39fd4
K7GW Trojan ( 0055e4091 )
Cybereason malicious.85f53b
Symantec Trojan.Gen
ESET-NOD32 Win32/LockScreen.AHM
APEX Malicious
Avast FileRepMalware
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Symmi.86576
NANO-Antivirus Trojan.Win32.Chameleon.dzzwm
MicroWorld-eScan Gen:Variant.Symmi.86576
Tencent Win32.Trojan.Chameleonunlice.dqn
Ad-Aware Gen:Variant.Symmi.86576
Sophos Mal/Generic-S + Mal/EncPk-AAT
Comodo TrojWare.Win32.Trojan.XPACK.Gen@2ho5ur
BitDefenderTheta AI:Packer.73C455EC1F
VIPRE Trojan.Win32.Generic!BT
TrendMicro TROJ_RANSOM.JAP
McAfee-GW-Edition BehavesLike.Win32.PWSZbot.mc
FireEye Generic.mg.099923485f53b520
Emsisoft Gen:Variant.Symmi.86576 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan.ChameleonUnlicence.b
Webroot W32.Trojan.Gen
Avira TR/Crypt.ULPM.Gen
Kingsoft Win32.HeurC.KVM007.a.(kcloud)
Microsoft Ransom:Win32/Loktrom.B
GData Gen:Variant.Symmi.86576
McAfee Artemis!099923485F53
MAX malware (ai score=100)
VBA32 Trojan.Zeus.EA.0999
Malwarebytes Malware.Heuristic.1003
Panda Generic Malware
TrendMicro-HouseCall TROJ_RANSOM.JAP
Rising Ransom.Loktrom!8.B04 (CLOUD)
Yandex Trojan.Chameleon!0xk5Q9/q+Es
Ikarus Trojan-Ransom.ChameleonUnlicence
MaxSecure Trojan.Malware.7164915.susgen
Fortinet W32/Kryptik.NAS!tr
AVG FileRepMalware
Qihoo-360 Win32/Trojan.Generic.HwsBL0QA

How to remove Win32/LockScreen.AHM ransomware?

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.

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Press “Install” button.

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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.AHM 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.AHM 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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