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

What is VirTool:Win32/Ymacco infection?

In this article you will certainly find regarding the meaning of VirTool:Win32/Ymacco as well as its negative effect on your computer system. Such ransomware are a kind of malware that is clarified by on-line frauds to demand paying the ransom money by a victim.

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Most of the cases, VirTool:Win32/Ymacco ransomware will instruct its sufferers to launch funds transfer for the function of counteracting the amendments that the Trojan infection has introduced to the sufferer’s gadget.

VirTool:Win32/Ymacco Summary

These adjustments 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.
  • 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.
  • 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.

  • 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.
  • 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 papers located on the victim’s disk drive — so the sufferer can no more use the information;
  • Preventing regular accessibility to the sufferer’s workstation;


The most regular networks where VirTool:Win32/Ymacco Trojans are injected are:

  • By ways of phishing emails;
  • As a consequence of user winding up on a resource that organizes a harmful software program;

As quickly as the Trojan is effectively infused, it will certainly either cipher the information on the sufferer’s computer or protect against the tool from working in a correct fashion – while likewise positioning a ransom money note that states the need for the targets to effect the repayment for the objective of decrypting the documents or bring back the data system back to the preliminary condition. In the majority of instances, the ransom note will come up when the customer reboots the COMPUTER after the system has actually currently been damaged.

VirTool:Win32/Ymacco distribution networks.

In different corners of the globe, VirTool:Win32/Ymacco grows by leaps and bounds. However, the ransom money notes as well as tricks of obtaining the ransom quantity may differ relying on certain local (regional) settings. The ransom money notes and also techniques of obtaining the ransom money amount might vary depending on certain local (local) settings.

Ransomware injection

As an example:

    Faulty signals concerning unlicensed software application.

    In particular areas, the Trojans commonly wrongfully report having identified some unlicensed applications enabled on the victim’s device. The sharp after that demands the customer to pay the ransom.

    Faulty statements about illegal material.

    In nations where software application piracy is less prominent, this method is not as reliable for the cyber fraudulences. Alternatively, the VirTool:Win32/Ymacco popup alert may wrongly declare to be stemming from a police organization and also will report having situated child pornography or various other unlawful information on the gadget.

    VirTool:Win32/Ymacco popup alert may wrongly declare to be acquiring from a regulation enforcement organization as well as will report having located child porn or various other illegal data on the device. The alert will in a similar way contain a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: 7FB1B24F
md5: 5fa8e60c26591356b8974ab975dce5ff
name: 5FA8E60C26591356B8974AB975DCE5FF.mlw
sha1: c4ccc9f15a777ecb0611f27f2abc6f40cadf8daf
sha256: 11e4fe567e9f09e81d87a199b3ed94dffaf1a099a2e2c3ae3949bfdb9851655e
sha512: 06da311778444053a86eed48755ec3fdbe53ec2bc32d26a090849abe9d99a4b447657149ac414a9e6e4a04e607a409a97c090c2a77f62b0eb60150b2ebcab052
ssdeep: 6144:mAimdYNHquiwwiXNctNy+1Oi/mPjb8y9Vcd+74S/o1Xrch0N+LDgiIxwQW5nY3Gv:m1NjHLXNkQ+cLwld4h6N+vgi7Znoip
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 2012
Assembly Version:
InternalName: exeBase.exe
ProductName: exeBase
FileDescription: exeBase
OriginalFilename: exeBase.exe

VirTool:Win32/Ymacco also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 700000121 )
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop.65449
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.YakbeexMSIL.ZZ4
ALYac Gen:Variant.MSILPerseus.10871
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
K7GW Trojan ( 700000121 )
Cybereason malicious.c26591
Cyren W32/Trojan.DPKM-3815
Symantec ML.Attribute.HighConfidence
ESET-NOD32 MSIL/TrojanDropper.Agent.SE
Zoner Trojan.Win32.87151
APEX Malicious
Avast Win32:CrypterX-gen [Trj]
ClamAV Win.Malware.Msilperseus-6838278-0
Kaspersky HEUR:Backdoor.Win32.Generic
BitDefender Gen:Variant.MSILPerseus.10871
NANO-Antivirus Trojan.Win32.Agent.cxeaac
SUPERAntiSpyware Trojan.Agent/Gen-Kazy
MicroWorld-eScan Gen:Variant.MSILPerseus.10871
Tencent Backdoor.Win32.Generic.b
Ad-Aware Gen:Variant.MSILPerseus.10871
Sophos ML/PE-A + Mal/Mdrop-KN
BitDefenderTheta Gen:NN.ZemsilF.34686.Dm3@a8!LW7c
Emsisoft Gen:Variant.MSILPerseus.10871 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Backdoor/DarkKomet.amb
Avira TR/Dropper.Gen
Kingsoft Heur.SSC.2693581.1216.(kcloud)
Microsoft VirTool:Win32/Ymacco
GData Gen:Variant.MSILPerseus.10871
AhnLab-V3 Trojan/Win32.Agent.R88538
McAfee Ransom-FJB!5FA8E60C2659
MAX malware (ai score=86)
VBA32 TScope.Trojan.MSIL
Malwarebytes Trojan.FileCrypt
Panda Trj/Dropper.JUW
Yandex Trojan.Agent!qpJG+/H79Bk
Ikarus Backdoor.Win32.SuspectCRC
MaxSecure Trojan.Malware.121218.susgen
Fortinet MSIL/TrojanDropper.SE!tr
AVG Win32:CrypterX-gen [Trj]

How to remove VirTool:Win32/Ymacco 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/Ymacco 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/Ymacco 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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