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

What is VirTool:Win32/Obfuscator.ACK infection?

In this post you will certainly locate about the interpretation of VirTool:Win32/Obfuscator.ACK as well as its negative impact on your computer system. Such ransomware are a form of malware that is specified by on-line scams to require paying the ransom by a sufferer.

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In the majority of the cases, VirTool:Win32/Obfuscator.ACK virus will certainly instruct its targets to initiate funds move for the function of counteracting the changes that the Trojan infection has actually presented to the sufferer’s device.

VirTool:Win32/Obfuscator.ACK Summary

These adjustments can be as complies with:

  • The binary contains an unknown PE section name indicative of packing;
  • Authenticode signature is invalid;
  • Anomalous binary characteristics;
  • Ciphering the files situated on the victim’s hard disk drive — so the target can no longer use the data;
  • Preventing normal access to the sufferer’s workstation;


The most common channels whereby VirTool:Win32/Obfuscator.ACK Ransomware are injected are:

  • By methods of phishing emails;
  • As a consequence of individual ending up on a resource that hosts a destructive software;

As soon as the Trojan is successfully infused, it will certainly either cipher the information on the victim’s PC or stop the tool from working in an appropriate way – while also positioning a ransom note that discusses the need for the sufferers to effect the payment for the function of decrypting the files or bring back the file system back to the first condition. In most instances, the ransom money note will turn up when the client reboots the COMPUTER after the system has currently been harmed.

VirTool:Win32/Obfuscator.ACK circulation channels.

In different edges of the world, VirTool:Win32/Obfuscator.ACK expands by jumps as well as bounds. Nevertheless, the ransom money notes and also techniques of obtaining the ransom money quantity may vary depending upon specific neighborhood (local) setups. The ransom notes as well as methods of obtaining the ransom money amount might differ depending on certain local (regional) settings.

Ransomware injection

As an example:

    Faulty informs regarding unlicensed software application.

    In certain locations, the Trojans commonly wrongfully report having actually discovered some unlicensed applications made it possible for on the victim’s device. The sharp after that demands the user to pay the ransom.

    Faulty statements concerning illegal material.

    In countries where software application piracy is less prominent, this method is not as effective for the cyber fraudulences. Alternatively, the VirTool:Win32/Obfuscator.ACK popup alert may wrongly declare to be deriving from a law enforcement establishment and also will certainly report having situated kid pornography or various other prohibited data on the gadget.

    VirTool:Win32/Obfuscator.ACK popup alert may wrongly claim to be obtaining from a legislation enforcement institution as well as will certainly report having located child porn or other prohibited information on the device. The alert will likewise include a need for the customer to pay the ransom money.

Technical details

File Info:

name: CA9CA0867ED54731F8F4.mlw
path: /opt/CAPEv2/storage/binaries/87a66bf421c4fb852faa4cf0ded38bbbf5a31fd55b21b59c4c431fb54b4468b3
crc32: 2C0E2D3A
md5: ca9ca0867ed54731f8f44fc15785f909
sha1: 749b5d8624db870b3d5e6723afc87ca9ab79eef4
sha256: 87a66bf421c4fb852faa4cf0ded38bbbf5a31fd55b21b59c4c431fb54b4468b3
sha512: ff65e5d8a424c940677c43e7e1e4cdc29bc1c179c9fa12ec78ebb55e3c7a2fecd538b47655c37b3ba77263c0c2cf7bf5af8d908456f408b684dfabdb391eb384
ssdeep: 3072:k72WcW+C36WJ6TPostpg0kQ5EnBU7fqH9l5Es:Q2WcW5J2ospsEyH9li
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T10804D06292E3511AE2FF433206A3B28E49763F26596DB2C6E7849DC92B31944FD31713
sha3_384: 007917cf487a29b410f5edc6c59d836eedc8c7cccab3e96ab259954daca7d10280401cc67f58e1ea7f723e55ac8b6247
ep_bytes: 00000000000000000000000000000000
timestamp: 2011-03-26 07:06:26

Version Info:

0: [No Data]

VirTool:Win32/Obfuscator.ACK also known as:

K7AntiVirusRiskware ( 0040eff71 )
K7GWRiskware ( 0040eff71 )
AvastWin32:Crypt-OBL [Trj]
RisingTrojan.Generic@ML.93 (RDMK:bKjFghK7yfTJOJZZRu5LbA)
EmsisoftTrojan.GenericKD.38088772 (B)
MAXmalware (ai score=89)
CynetMalicious (score: 100)
SentinelOneStatic AI – Suspicious PE
AVGWin32:Crypt-OBL [Trj]
CrowdStrikewin/malicious_confidence_100% (W)

How to remove VirTool:Win32/Obfuscator.ACK 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.ACK 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.ACK 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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