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

What is VirTool:Win32/Obfuscator.KH infection?

In this post you will certainly discover about the interpretation of VirTool:Win32/Obfuscator.KH as well as its negative influence on your computer system. 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 situations, VirTool:Win32/Obfuscator.KH virus will instruct its victims to start funds transfer for the function of reducing the effects of the modifications that the Trojan infection has introduced to the victim’s gadget.

VirTool:Win32/Obfuscator.KH Summary

These alterations 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.
  • Unconventionial language used in binary resources: Russian;
  • 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.
  • Ciphering the records found on the sufferer’s disk drive — so the target can no more use the data;
  • Preventing regular accessibility to the sufferer’s workstation;


One of the most regular channels where VirTool:Win32/Obfuscator.KH are injected are:

  • By ways of phishing emails;
  • As an effect of individual ending up on a resource that holds a harmful software program;

As quickly as the Trojan is efficiently injected, it will certainly either cipher the data on the victim’s computer or avoid the gadget from functioning in an appropriate fashion – while likewise placing a ransom money note that states the requirement for the targets to impact the settlement for the function of decrypting the records or restoring the data system back to the preliminary condition. In many circumstances, the ransom money note will certainly come up when the customer reboots the COMPUTER after the system has currently been harmed.

VirTool:Win32/Obfuscator.KH circulation channels.

In different edges of the globe, VirTool:Win32/Obfuscator.KH grows by leaps as well as bounds. Nonetheless, the ransom money notes and tricks of obtaining the ransom money amount may differ depending on specific neighborhood (local) setups. The ransom money notes as well as methods of extorting the ransom money amount might vary depending on particular local (regional) settings.

Ransomware injection

As an example:

    Faulty signals concerning unlicensed software.

    In specific areas, the Trojans commonly wrongfully report having identified some unlicensed applications enabled on the target’s gadget. The alert then demands the individual to pay the ransom money.

    Faulty declarations about prohibited web content.

    In nations where software piracy is much less popular, this approach is not as effective for the cyber frauds. Conversely, the VirTool:Win32/Obfuscator.KH popup alert might incorrectly claim to be deriving from a law enforcement organization as well as will certainly report having located youngster pornography or various other illegal information on the device.

    VirTool:Win32/Obfuscator.KH popup alert might falsely declare to be deriving from a law enforcement institution as well as will certainly report having situated youngster porn or other illegal information on the gadget. The alert will likewise include a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: 3834A1F4
md5: bc91c089315c35ce7ec7efef2f0d84d6
name: BC91C089315C35CE7EC7EFEF2F0D84D6.mlw
sha1: 4a20c6dcfe1cced47d7ee717f66266778d76d1ec
sha256: 481d67ebd05d7ff566c9fb3fba76d9d0a28420d88b1a010a4727f0fbb151e152
sha512: b83e2af33623baef3607279e59ff70358a03fb9eefe6e325802f2296d10ad5cd161d70fa462b49c8b72f8a86e17957857dfcb1b629b35b0133de8f211f7d76bd
ssdeep: 6144:fAt5FuFGQHoUORMn59jVe2KzYEOr9kPg8/1Fhq:g5wFGQHoUOynjVeBzYW/1
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: 2000-
Web: kjtlael
FileVersion: 9.36.11
Author: rsumfoq
CompanyName: sysiv
File Description: wbxv
Comments: gdxmycn
Internal Name: knwr
Translation: 0x0409 0x04b0

VirTool:Win32/Obfuscator.KH also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 005223351 )
Elastic malicious (high confidence)
Cynet Malicious (score: 100)
ALYac Trojan.Generic.4733074
Cylance Unsafe
Zillya Trojan.LockScreen.Win32.8491
Sangfor Trojan.Win32.Save.a
Alibaba Ransom:Win32/PinkBlocker.1af3cc85
K7GW Trojan ( 005223351 )
Cybereason malicious.9315c3
Symantec Trojan.Zbot!gen9
ESET-NOD32 Win32/LockScreen.UK
APEX Malicious
Avast Win32:Trojan-gen
Kaspersky Trojan-Ransom.Win32.PinkBlocker.clc
BitDefender Trojan.Generic.4733074
NANO-Antivirus Trojan.Win32.Winlock.bdusf
MicroWorld-eScan Trojan.Generic.4733074
Tencent Win32.Trojan.Pinkblocker.Pijp
Ad-Aware Trojan.Generic.4733074
Sophos ML/PE-A + Mal/FakeAV-BW
Comodo MalCrypt.Indus!@1qrzi1
BitDefenderTheta AI:Packer.B119D3FD1F
VIPRE Trojan.Win32.Kryptik.fte (v)
McAfee-GW-Edition BehavesLike.Win32.PWSZbot.dh
Emsisoft Trojan.Generic.4733074 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan/PinkBlocker.amg
Avira TR/Crypt.XPACK.Gen8
eGambit Generic.Malware
Antiy-AVL Trojan/Generic.ASMalwS.1887F77
Microsoft VirTool:Win32/Obfuscator.KH
AegisLab Trojan.Win32.PinkBlocker.j!c
GData Trojan.Generic.4733074
Acronis suspicious
McAfee Artemis!BC91C089315C
MAX malware (ai score=100)
VBA32 BScope.TrojanPSW.Tinba
Panda Trj/Genetic.gen
Rising [email protected] (RDML:YX90sMXX8aD+U8r/v7bkjw)
Ikarus Worm.Win32.Ramnit
Fortinet W32/Krypt.A!tr.dldr
AVG Win32:Trojan-gen

How to remove VirTool:Win32/Obfuscator.KH 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 VirTool:Win32/Obfuscator.KH 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 VirTool:Win32/Obfuscator.KH you can always ask me in the comments for getting help.

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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.

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