Ymacco Trojan


Ymacco is a representative of the infamous malware class of Trojan horse viruses. This makes Ymacco highly dangerous and if you’ve detected it in your system, you should see to its removal as soon as possible.

Ymacco Trojan

The Ymacco Trojan detected by multiple antivirus programs on VirusTotal

Trojan horse viruses like Ymacco, SAntivirusKD.sys, Wup.exe are capable of a wide range of different malicious tasks. This is one of the main qualities that sets these particular pieces of malicious code apart from others. And it is also one of the main reasons why Trojans are the dominating category of computer viruses. They by far outnumber any other malware type, and according to some sources they’re even responsible for as much as 90% of all malware attacks that occur via the internet.

That’s certainly saying something. So, their versatility and multifaceted nature is without doubt what makes them a preferred weapon for millions of hackers and cybercriminals out there.

But another thing that makes variants like Ymacco so popular within these circles is the fact that they’re also incredibly stealthy. A single Trojan horse virus can sneak into your system without being noticed. And it can remain there, hidden deep in it, performing whatever is on its agenda, for up to years on end.

It’s not unusual for many Trojan horse viruses to even have the capacity to disable your antivirus software after they’ve invaded the machine. So, if you have discovered Ymacco on your PC, you may want to check if that may have happened in your case. But even if it hasn’t, it’s still a great thing that you’ve managed to detect this malware and can, therefore, now remove it from your computer to prevent it from causing any further harm.

In fact, to help you with this task, our team of professionals has designed a special removal guide for Ymacco, which is available to use, free of charge, just below this current post. But a word of caution is that the steps in the guide do require dealing with system files. So it’s important that you stick the instructions as closely as you can to avoid potentially damaging your own OS. And if you would rather leave this job to a specialized malware removal program, we can offer you one of those as well.

How Trojans operate

Once Ymacco has invaded your system, it could be up to a large variety of different malicious tasks – all at once. Unfortunately, due to its novelty, we don’t have enough information at this time to pinpoint what the hackers behind it are using it for exactly.

But we can give you an idea of some of the most popular usages for Trojans. And these mainly revolve around theft of sensitive information for all sorts of purposes and resource exploitation. Now, the former should be relatively clear. The latter, if you’re unfamiliar with the subject, is when the Trojan basically uses your computer’s processing power and storage to execute various processes on behalf of the criminals. Typically this would be for the goal of mining cryptocurrencies on the infected computer, or it may be to launch DDoS attacks and include your PC in botnets.


Name Ymacco
Type Trojan
Danger Level  High (Trojans are often used as a backdoor for Ransomware)
Symptoms  Trojan horse infections usually do not have any symptoms at all. 
Distribution Method  Spam messages are among the leading distribution channels for Trojans, particularly included in attached files or embedded in links.
Detection Tool

Remove Ymacco Virus

If you are looking for a way to remove Ymacco you can try this:

  1. Click on the Start button in the bottom left corner of your Windows OS.
  2. Go to Control Panel -> Programs and Features -> Uninstall a Program.
  3. Search for Ymacco and any other unfamiliar programs.
  4. Uninstall Ymacco as well as other suspicious programs.

Note that this might not get rid of Ymacco completely. For more detailed removal instructions follow the guide below.

If you have a Windows virus, continue with the guide below.

If you have a Mac virus, please use our How to remove Ads on Mac guide.

If you have an Android virus, please use our Android Malware Removal guide.

If you have an iPhone virus, please use our iPhone Virus Removal guide

Ymacco Trojan

Some of the steps will likely require you to exit the page. Bookmark it for later reference.

Reboot in Safe Mode (use this guide if you don’t know how to do it).

Ymacco Trojan


Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab. Try to determine which processes are dangerous. 

Ymacco Trojan

Right click on each of them and select Open File Location. Then scan the files with our free online virus scanner:

Ymacco Trojan
Drag and Drop Files Here to Scan
Maximum file size: 128MB.

This scanner is free and will always remain free for our website's users. You can find its full-page version at: https://howtoremove.guide/online-virus-scanner/

Scan Results

Virus Scanner Result
Ymacco TrojanClamAV
Ymacco TrojanAVG AV
Ymacco TrojanMaldet

After you open their folder, end the processes that are infected, then delete their folders. 

Note: If you are sure something is part of the infection – delete it, even if the scanner doesn’t flag it. No anti-virus program can detect all infections. 

Ymacco Trojan

Hold together the Start Key and R. Type appwiz.cpl –> OK.

Ymacco Trojan

You are now in the Control Panel. Look for suspicious entries. Uninstall it/them. If you see a screen like this when you click Uninstall, choose NO:

Ymacco Trojan

Ymacco Trojan

Type msconfig in the search field and hit enter. A window will pop-up:

Ymacco Trojan

Startup —> Uncheck entries that have “Unknown” as Manufacturer or otherwise look suspicious.

  • Remember this step – if you have reason to believe a bigger threat (like ransomware) is on your PC, check everything here.

Hold the Start Key and R –  copy + paste the following and click OK:

notepad %windir%/system32/Drivers/etc/hosts

A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

Ymacco Trojan

If there are suspicious IPs below “Localhost” – write to us in the comments.

Ymacco Trojan

Type Regedit in the windows search field and press Enter.

Once inside, press CTRL and F together and type the virus’s Name. Right click and delete any entries you find with a similar name. If they don’t show up this way, go manually to these directories and delete/uninstall them:

  • HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious.
    HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
    HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random

If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!


About the author


Violet George

Violet is an active writer with a passion for all things cyber security. She enjoys helping victims of computer virus infections remove them and successfully deal with the aftermath of the attacks. But most importantly, Violet makes it her priority to spend time educating people on privacy issues and maintaining the safety of their computers. It is her firm belief that by spreading this information, she can empower web users to effectively protect their personal data and their devices from hackers and cybercriminals.

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