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

What is VirTool:Win32/Obfuscator.ACV infection?

In this post you will discover about the meaning of VirTool:Win32/Obfuscator.ACV and its adverse effect on your computer. Such ransomware are a type of malware that is elaborated by on the internet frauds to require paying the ransom by a target.

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Most of the instances, VirTool:Win32/Obfuscator.ACV virus will certainly advise its victims to launch funds move for the purpose of neutralizing the changes that the Trojan infection has presented to the sufferer’s gadget.

VirTool:Win32/Obfuscator.ACV Summary

These alterations can be as complies with:

  • 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);
  • Compression (or decompression);
  • 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.;
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • Executed a process and injected code into it, probably while unpacking;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • 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
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Creates a slightly modified copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files found on the sufferer’s hard drive — so the target can no longer make use of the data;
  • Preventing normal accessibility 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


The most typical networks through which VirTool:Win32/Obfuscator.ACV Trojans are infused are:

  • By ways of phishing emails;
  • As an effect of user winding up on a source that organizes a malicious software program;

As soon as the Trojan is successfully injected, it will certainly either cipher the data on the sufferer’s computer or protect against the device from operating in a proper way – while also positioning a ransom note that mentions the requirement for the victims to impact the payment for the function of decrypting the files or bring back the documents system back to the first condition. In most instances, the ransom money note will certainly come up when the customer reboots the COMPUTER after the system has actually currently been harmed.

VirTool:Win32/Obfuscator.ACV circulation channels.

In different corners of the globe, VirTool:Win32/Obfuscator.ACV expands by jumps and also bounds. However, the ransom notes and methods of extorting the ransom amount might vary depending on particular neighborhood (local) setups. The ransom money notes and techniques of obtaining the ransom amount may vary depending on particular regional (regional) settings.

Ransomware injection

As an example:

    Faulty informs concerning unlicensed software program.

    In particular locations, the Trojans commonly wrongfully report having found some unlicensed applications made it possible for on the target’s device. The sharp after that requires the customer to pay the ransom.

    Faulty declarations concerning illegal content.

    In nations where software piracy is less preferred, this technique is not as effective for the cyber frauds. Alternatively, the VirTool:Win32/Obfuscator.ACV popup alert might wrongly assert to be originating from a law enforcement organization and will report having situated youngster porn or various other prohibited information on the gadget.

    VirTool:Win32/Obfuscator.ACV popup alert may falsely claim to be obtaining from a regulation enforcement institution as well as will certainly report having located kid pornography or other prohibited data on the gadget. The alert will likewise have a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: 9D9FD929
md5: e63b8f84c8073980a7c14abec9880c72
name: E63B8F84C8073980A7C14ABEC9880C72.mlw
sha1: ef29117427e148ad9978d8e39f41d3d57e48a913
sha256: de876b492f109ae9b15e70766e6be7c29865eb0a845d6413aa65f5ca8a0f21c5
sha512: 9cbf83637ddc8ad37d45f61dcf80a1cef5cca2dccdda6288519863185d76e5ab863541f07f9f93311981d597ea83b474d02607bd3b83b982cbc700b28f433135
ssdeep: 3072:+S/G6ixzPXPQLgggggggggggghdeBPw9IrdcV4LNFYohi:+S+6SXPigrrq2FBi
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: xa9 Microsoft Corporation. All rights reserved.
InternalName: MSHTMLED.DLL
FileVersion: 7.00.6001.18000 (longhorn_rtm.080118-1840)
CompanyName: Microsoft Corporation
ProductName: Windowsxae Internet Explorer
ProductVersion: 7.00.6001.18000
FileDescription: Microsoftxae HTML Editing Component
OriginalFilename: MSHTMLED.DLL
Translation: 0x0409 0x04b0

VirTool:Win32/Obfuscator.ACV also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
DrWeb Trojan.AVKill.34819
MicroWorld-eScan Trojan.Snifula.Gen.1
ALYac Trojan.Snifula.Gen.1
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
K7AntiVirus Trojan ( 0055dd191 )
BitDefender Trojan.Snifula.Gen.1
K7GW Trojan ( 0055dd191 )
Cybereason malicious.4c8073
BitDefenderTheta Gen:NN.ZexaF.34804.jq3@ayB90adi
Symantec ML.Attribute.HighConfidence
TrendMicro-HouseCall BKDR_VAWTRAK.SM3
Avast Win32:Reveton-AAH [Trj]
Kaspersky HEUR:Trojan.Win32.Generic
NANO-Antivirus Trojan.Win32.Inject.crjbon
Rising Trojan.Generic!8.C3 (CLOUD)
Ad-Aware Trojan.Snifula.Gen.1
Emsisoft Trojan.Snifula.Gen.1 (B)
Comodo Malware@#1hfqtlmvas535
F-Secure Trojan.TR/Crypt.ZPACK.Gen4
Zillya Trojan.Sasfis.Win32.34254
Sophos Mal/Generic-S + Mal/Vawtrak-H
Ikarus Trojan.Snifula
Avira TR/Crypt.ZPACK.Gen4
MAX malware (ai score=85)
Antiy-AVL Trojan/Win32.Tgenic
Kingsoft Win32.Troj.Injector.jr.(kcloud)
Microsoft VirTool:Win32/Obfuscator.ACV
Arcabit Trojan.Snifula.Gen.1
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.Snifula.Gen.1
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Injector.R89175
Acronis suspicious
McAfee FakeSecTool-FCR!E63B8F84C807
VBA32 Trojan.Sasfis
Malwarebytes Generic.Malware/Suspicious
APEX Malicious
ESET-NOD32 a variant of Win32/Kryptik.BOXO
Tencent Malware.Win32.Gencirc.11498d19
Yandex Trojan.Sasfis!zoCAjB77S3A
SentinelOne Static AI – Malicious PE
Fortinet W32/LockScreen.AZN!tr
Webroot Trojan.Dropper.Gen
AVG Win32:Reveton-AAH [Trj]
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 Win32/Trojan.BO.84d

How to remove VirTool:Win32/Obfuscator.ACV 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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The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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.ACV 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.ACV you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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