Win32/LockScreen.AMA

What is Win32/LockScreen.AMA infection?

In this short article you will certainly discover about the interpretation of Win32/LockScreen.AMA and also its adverse influence on your computer. Such ransomware are a kind of malware that is specified by on-line fraudulences to require paying the ransom by a sufferer.

In the majority of the cases, Win32/LockScreen.AMA ransomware will certainly instruct its targets to initiate funds transfer for the objective of reducing the effects of the modifications that the Trojan infection has actually introduced to the victim’s tool.

Win32/LockScreen.AMA Summary

These modifications can be as follows:

  • 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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.
  • Possible date expiration check, exits too soon after checking local time;
  • A process attempted to delay the analysis task.;
  • 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.
  • Executed a process and injected code into it, probably while unpacking;
  • Deletes its original binary from disk;
  • 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
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers found on the victim’s disk drive — so the target can no longer use the data;
  • 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
cdnexits.com Gen:Variant.Ransom.Cryak.55

Win32/LockScreen.AMA

The most common channels whereby Win32/LockScreen.AMA Ransomware Trojans are injected are:

  • By ways of phishing emails;
  • As a repercussion of user winding up on a resource that hosts a malicious software;

As soon as the Trojan is successfully injected, it will either cipher the information on the victim’s computer or protect against the tool from operating in a proper manner – while likewise positioning a ransom note that points out the demand for the targets to effect the settlement for the objective of decrypting the files or restoring the file system back to the preliminary condition. In most circumstances, the ransom money note will certainly come up when the client reboots the PC after the system has already been damaged.

Win32/LockScreen.AMA distribution networks.

In various edges of the world, Win32/LockScreen.AMA grows by leaps and bounds. Nevertheless, the ransom notes and also techniques of obtaining the ransom quantity may differ depending upon particular local (local) settings. The ransom money notes as well as methods of obtaining the ransom money quantity might differ depending on certain neighborhood (regional) setups.

Ransomware injection

For instance:

    Faulty signals concerning unlicensed software.

    In particular areas, the Trojans often wrongfully report having actually discovered some unlicensed applications enabled on the target’s tool. The sharp after that demands the individual to pay the ransom.

    Faulty statements about unlawful web content.

    In nations where software program piracy is less prominent, this approach is not as reliable for the cyber scams. Conversely, the Win32/LockScreen.AMA popup alert may falsely declare to be originating from a law enforcement establishment and also will certainly report having situated child porn or various other unlawful data on the gadget.

    Win32/LockScreen.AMA popup alert may incorrectly claim to be obtaining from a regulation enforcement organization and also will certainly report having situated youngster pornography or other prohibited information on the device. The alert will in a similar way have a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: 07CA5181md5: 4455922b28a51e82f25274d9e08fb32aname: 4455922B28A51E82F25274D9E08FB32A.mlwsha1: f918ea5f5309158f64ac006d9f6a5a0bfdd2185asha256: a959efe4eb0327dae60635c9879a5de4bce3a5f046fbe6da29a049b01915af50sha512: b25d557624a4f98e08e21dafbaf8a87869c6fef31f02d9ebba7551d2e76df2613390b0ddd5fb0389e0251755c447619a48720ab450d18d73da47b3272324e5e4ssdeep: 3072:+LZUAnPtl3LoSNQ39ULcymRBxQ/x+AOPrigbtfqi4Yhksx:KpD7o3smRBxQ/6P3Vtype: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/LockScreen.AMA also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Riskware ( 0040eff71 )
Elastic malicious (high confidence)
Cynet Malicious (score: 100)
ALYac Gen:Variant.Ransom.Cryak.55
Cylance Unsafe
Zillya Trojan.LockScreen.Win32.7923
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Trojan:Win32/LockScreen.a57c036a
K7GW Riskware ( 0040eff71 )
Cybereason malicious.b28a51
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/LockScreen.AMA
APEX Malicious
Avast Win32:Malware-gen
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Ransom.Cryak.55
NANO-Antivirus Trojan.Win32.Yakes.yrrma
ViRobot Trojan.Win32.A.Yakes.135680.E
MicroWorld-eScan Gen:Variant.Ransom.Cryak.55
Tencent Win32.Trojan.Lockscreen.Pbfh
Ad-Aware Gen:Variant.Ransom.Cryak.55
Comodo Malware@#38xltyhelpv33
BitDefenderTheta AI:Packer.E8874D0921
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Sytro.ch
FireEye Generic.mg.4455922b28a51e82
Emsisoft Gen:Variant.Ransom.Cryak.55 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan/Yakes.equ
Antiy-AVL Trojan/Generic.ASMalwS.18955E7
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft VirTool:Win32/DelfInject
AegisLab Trojan.Win32.Delf.lEHx
GData Gen:Variant.Ransom.Cryak.55
McAfee Artemis!4455922B28A5
MAX malware (ai score=98)
Panda Trj/CI.A
Rising [email protected] (RDML:9TJcw3PCli4WsuY8ku1R0g)
Yandex Trojan.Agent!OtFAh9RSYAY
Ikarus Trojan.Win32.Pincav
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Simda.B!tr
AVG Win32:Malware-gen
Paloalto generic.ml

How to remove Win32/LockScreen.AMA virus?

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

Run the setup file.

Run Setup.exe
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 Scanning

Click on “Clean Now”.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

Full version of GridinSoft

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

References

    About the author

    Robert Bailey

    Security engineer focused on malware behavior, removal workflows, and Windows hardening. Robert reviews threat articles for practical accuracy, checking detection names, symptoms, and cleanup steps before publication.

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