Ymacco Trojan — Trojan:Win32/Ymacco.AADC

Trojan:Win32/Ymacco.AADC virus
Written by Robert Bailey

What is Ymacco trojan infection?

In this article, you will find out the meaning of Trojan:Win32/Ymacco.AADC as well as its negative effect on your computer system. This trojan virus is a kind of malware that is used by cybercriminals to disable antivirus solutions and infect your system with much more dangerous malware

In the majority of cases, Trojan:Win32/Ymacco.AADC virus shows no strict signs of its presence in your system. However, the attentive user will definitely see something wrong with Microsoft Defender and several other system elements.

Today, Windows Defender found a PUP in the C:/Windows/Temp folder, and it can’t remove it. When I press the start action button, remove or quarantine button, the tab refreshes, and nothing happens (it sometimes says that manual action is needed, but again, when I press the button, nothing happens). I scanned my PC with Malwarebytes Anti-Malware Premium(Trial), Rkill, Adwcleaner, JRT, MBAR, Eset Online Scanner, Hitman Pro, NPE, and I even got ESET Smart Security Premium!! The other programs didn’t find anything, but windows defender still detects it and does nothing. Trojan name (Windows Defender): Win32/Ymacco.AADC
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Trojan:Win32/Ymacco.AADC Summary

The changes done by this virus are:

  • Editing the Group Policies in order to disable the Microsoft Defender
  • Editing the registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dnscache;
  • Adding its own registry key to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run.
Similar behavior
Related domains

Trojan:Win32/Ymacco.AADC distribution ways

The most common channels through which Trojan:Win32/Ymacco.AADC Ransomware Trojans are injected are:

  • Malvertising in the Internet;
  • E-mail spamming; the virus is hidden inside of the attached item
  • Software bundles, i.e. situations when there is several programs distributed as a single one, without the primary notifying the user.

To avoid the Ymacco.AADC penetration into your computer, be very careful while browsing the dubious websites and installing the programs you got from them. These sites often have no HTTPS certificate and also have a lot of blinking ads with questionable content. E-mail spamming is harder to avoid. However, it is easier to check if the sender is really a person he introduced as.

Trojan:Win32/Ymacco.AADC visible effects.

After the successful injection into the system, Trojan:Win32/Ymacco.AADC virus makes your system more vulnerable to malware attacks. First of all, it adds itself into HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run registry hive, which allows it to load together with the system. Then, Group Policy changes are done. That step is targeted on the Microsoft Defender, which can be disabled in such away. Finally, Ymacco.AADC downloads other viruses that are stored on the server, which malware distributors handle.

Ransomware injection

Possible visible signs of virus presence are next:

  • Spontaneouly appearing console windows, which disappear in less than a second;
  • Performance plummence;
  • High CPU/RAM load, strange processes in the Task Manager.

Technical details

File Info:

crc32: 89031271
md5: 23e7e8bddbf8e7cca793bec406ec9088
name: injector_v3.sfx.exe
sha1: b16243cf9c046a160d254776659ae975d043509d
sha256: ec1219ac45929d41e0c4ae31603fa00bf42db1ae64456c2c3f9d01bd90a446f9
sha512: 87a9ae4490774e2a883e676b32fd24719e83ce4e7c2ad7d5a3e4bf127a8fad2b84c30daca80d4c26b00687abf0a58ee32bc013f64c1693790106ee616e0a5d86
ssdeep: 12288:0Qnk3GDYKGcblwtX+t4Y8EHTUFxCLthfdG:IAOcZwXYxHTUFoLtxdG
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Ymacco.AADC also known as:

K7AntiVirusTrojan ( 004fbb2b1 )
K7GWTrojan ( 004fbb2b1 )
CrowdStrikewin/malicious_confidence_70% (W)
EmsisoftTrojan.Ransom.GenericKD.33961951 (B)
MAXmalware (ai score=83)

How to remove Trojan:Win32/Ymacco.AADC ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
Reasons why I would recommend GridinSoft1

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 the 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 Trojan:Win32/Ymacco.AADC files and other malicious programs. This process can take 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 the 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 Trojan:Win32/Ymacco.AADC you can always ask me in the comments to get help.

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  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/products/

About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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