Written by Robert Bailey

What is Ransom:Win32/Loktrom infection?

In this post you will certainly find about the interpretation of Ransom:Win32/Loktrom as well as its adverse influence on your computer. Such ransomware are a form of malware that is clarified by on-line frauds to require paying the ransom by a sufferer.

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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.
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In the majority of the cases, Ransom:Win32/Loktrom infection will certainly instruct its targets to start funds transfer for the function of reducing the effects of the modifications that the Trojan infection has actually introduced to the target’s device.

Ransom:Win32/Loktrom Summary

These alterations 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.
  • 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.;
  • 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;
  • 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.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the papers found on the sufferer’s hard disk — so the victim can no longer utilize the data;
  • Preventing normal access 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.
Similar behavior
Related domains
z.whorecord.xyz Trojan-Ransom.Win32.Blocker.knyf
a.tomx.xyz Trojan-Ransom.Win32.Blocker.knyf


One of the most common channels whereby Ransom:Win32/Loktrom are injected are:

  • By ways of phishing emails;
  • As a repercussion of individual winding up on a source that holds a malicious software application;

As quickly as the Trojan is effectively injected, it will certainly either cipher the information on the victim’s PC or stop the gadget from operating in a correct way – while also putting a ransom note that discusses the need for the sufferers to impact the settlement for the function of decrypting the files or restoring the documents system back to the first condition. In most circumstances, the ransom money note will certainly turn up when the client restarts the COMPUTER after the system has actually already been harmed.

Ransom:Win32/Loktrom circulation channels.

In different corners of the world, Ransom:Win32/Loktrom grows by jumps and bounds. However, the ransom money notes and methods of obtaining the ransom money amount might vary depending upon specific regional (local) settings. The ransom notes as well as methods of extorting the ransom money amount may vary depending on certain local (local) setups.

Ransomware injection

For example:

    Faulty alerts concerning unlicensed software application.

    In particular locations, the Trojans typically wrongfully report having actually identified some unlicensed applications enabled on the target’s tool. The sharp after that demands the user to pay the ransom money.

    Faulty statements about illegal web content.

    In countries where software piracy is much less preferred, this technique is not as reliable for the cyber frauds. Additionally, the Ransom:Win32/Loktrom popup alert may incorrectly assert to be deriving from a law enforcement institution and also will report having situated kid porn or other illegal information on the device.

    Ransom:Win32/Loktrom popup alert might wrongly assert to be deriving from a legislation enforcement establishment and will certainly report having situated kid pornography or other prohibited data on the device. The alert will likewise contain a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 998C92FA
md5: 4758d1d424632679b0a4e6635a0084e6
name: 4758D1D424632679B0A4E6635A0084E6.mlw
sha1: 1f1bba0acec5c0c3d7d1e281c0fa69720539dfdf
sha256: 95edadc448921b48e7fdf654aa428afe9e7fc06651888e6332c3737602ff987b
sha512: cd80c08366239c4044d2cabec7d1812c11c976c80635d5b30757752b24379941795d888c981234d6c968f06dc7b3cba8783bc741728ef9c0ec2092a0a4c1e3b8
ssdeep: 3072:/DjKCU8joR5MYNT6glr0go8m8s8YtOb3LAKqjx2roTQ:bhEroglr89xty3E1
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

ProductName: Xvii Grout Exam Batch Derby Leers
FileDescription: Wharf
FileVersion: 7, 10, 5
OriginalFilename: Theme.exe
CompanyName: Apew
Translation: 0x0409 0x04b0

Ransom:Win32/Loktrom also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Riskware ( 0040eff71 )
Elastic malicious (high confidence)
DrWeb Trojan.Winlock.7048
Cynet Malicious (score: 100)
ALYac Gen:Variant.Ser.Razy.14015
Cylance Unsafe
Zillya Trojan.PornoAsset.Win32.12655
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_70% (D)
K7GW Riskware ( 0040eff71 )
Cybereason malicious.424632
Cyren W32/Yakes.K.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Kryptik.AUHL
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.knyf
BitDefender Gen:Variant.Ser.Razy.14015
NANO-Antivirus Trojan.Win32.Winlock.bgfjez
MicroWorld-eScan Gen:Variant.Ser.Razy.14015
Tencent Win32.Trojan.Pornoasset.bbam
Ad-Aware Gen:Variant.Ser.Razy.14015
Sophos Mal/Generic-S + Mal/Zbot-LB
Comodo Suspicious@#3bi2u9li0sxch
BitDefenderTheta Gen:NN.ZexaF.34684.gmKfamIroDhi
VIPRE Trojan.Win32.Zbocheman.fb (v)
McAfee-GW-Edition BehavesLike.Win32.Trojan.cc
FireEye Generic.mg.4758d1d424632679
Emsisoft Gen:Variant.Ser.Razy.14015 (B)
SentinelOne Static AI – Malicious PE
Webroot W32.Malware.Gen
Avira HEUR/AGEN.1101738
Antiy-AVL Trojan[Ransom]/Win32.PornoAsset
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Ransom:Win32/Loktrom
AegisLab Trojan.Win32.Generic.lpuy
GData Gen:Variant.Ser.Razy.14015
Acronis suspicious
McAfee Artemis!4758D1D42463
MAX malware (ai score=84)
VBA32 BScope.Trojan.KillAV
Panda Bck/Qbot.AO
Rising Trojan.Win32.Generic.14192643 (C64:YzY0OgJXlX7Saw8Y)
Yandex Trojan.PornoAsset!PHPmgIeug0U
Ikarus Trojan-Ransom.PornoAsset
Fortinet W32/Yakes.B!tr
AVG Win32:Malware-gen
Paloalto generic.ml

How to remove Ransom:Win32/Loktrom 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

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 Ransom:Win32/Loktrom 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 Ransom:Win32/Loktrom you can always ask me in the comments for getting help.

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  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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