Trojan:Win32/Wacatac.B!ml (Trojan Wacatac)

Written by Robert Bailey

What is Trojan:Win32/Wacatac.B!ml infection?

In this post you will certainly find about the definition of Trojan:Win32/Wacatac.B!ml and its adverse influence on your computer. That trojan virus is noted as a “preparing virus” for the further ransomware attack. DeathRansom ransomware is an example of ransomware that is distributed in pair with Wacatac.B!ml trojan

Robert Bailey
Robert Bailey
IT Security Expert

It is better to prevent, than repair and repent!

When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
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In the majority of the situations, Trojan:Win32/Wacatac.B!ml infection will not try to show its presence in your system. The more time that virus will be active, the more data it will steal from the user’s PC.

Trojan:Win32/Wacatac.B!ml Summary

These modifications 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 a shellcode isn’t a big deal. It’s just data. The problem arises when the attacker can control the instruction pointer (EIP), usually by corrupting a function’s stack frame using a stack-based buffer overflow and then changing the execution flow by assigning this pointer to the address of the shellcode.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • 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.
  • Changes in networking settings. The virus makes several additional entries in the HOSTS file and also modifies various registry keys.
Similar behavior
Related domains

Trojan:Win32/Wacatac.B!ml distribution methods

The biggest share of Trojan:Win32/Wacatac.B!ml virus distribution is after these methods:

  • Email spam
  • Unlicensed software usage
  • Malvertising on the Web
  • Email spamming became a prevalent malware distribution method since the users do not raise suspicion on notifications from DHL or Amazon about the incoming delivery. However, it is quite easy to distinguish the malevolent email from the original one. One which is sent by cybercriminals has a strange sender address – something like At the same time, the original email address has a specific domain name ( or and can also be seen on the official website in the “Contact us” tab.

    Malicious advertisements on the web, however, is an old-timer of malware distribution. And the advice to stop clicking the blinking advertisements on untrustworthy websites exists as long as the ads on the Internet. You can also install ad-blocking plugins for your web browser – they will deal with any ads. However, if they are generated by adware already present on your PC, ad blockers will be useless.

    Software bundling is a widespread practice among the virus developers. Users who hack the programs to make them usable without purchasing a license approve any offer to include another program in the pack because they are gaining money in such a way. Check precisely the installation window for signs like “Advanced installation settings” or so. The ability to switch off the malware installation often hides under such items.

    Signs of Trojan:Win32/Wacatac.B!ml presence.

    In different edges of the world, victims of the Trojan:Win32/Wacatac.B!ml say about different signs of virus activity. Nonetheless, the common sign that your PC was infected is that its behavior differs from the one you used to.

    Ransomware injection

    Trojan:Win32/Wacatac.B!ml activity is quite hard to detect. And it is not a thing you need to wonder about – viruses like this one must stay undetected to be more effective and bring more effects. All changes it does are far away from the places where the user works. Group Policies, notifications settings, registry, Task Scheduler – these parts of the operating system are visited only when something goes wrong. And users get the fact that something is wrong only after the successful Wacatac activity.

    It is quite hard to detect the changes done in registry and Group Policies because of the huge amount of entries in these system elements. But the notifications settings, and, especially, Task Scheduler, are elementary to control. If you see that the programs you are used to receiving notifications have stopped sending them to you or several programs added to the list, it is better to raise suspicion. The scheduler is a rare-used application, so if you had nothing scheduled and now see that something appeared in it, launch the anti-malware program.

    Technical details

    File Info:

    crc32: 7E4A5970
    md5: a2ef611a5cccdb910b6f7d6b756f5051
    name: email.bin
    sha1: 9ad3c640bdd9350337fd62b7720e32a994878d95
    sha256: dd03a74de9be01ec502643c8e81b894bac31d59d95ab5ee8325197b18d676482
    sha512: 62b33eb2e500c4a83c4600e84aac5bc79f006942d291f4356c6b50d9094c072cad10e8e6b0ca94ac2e3f620673c6bbdd1d63f8f9fd88e9ef14e3116950a36cc6
    ssdeep: 3072:2KlOD7pXVeQMrCe4/Hn2qnTPDLEj7iXFU6AAqeNPremW0W1DJHtRzLyIVO:2Ui7pXkcZ/LTPUqFDqeNPremStR/
    type: PE32 executable (GUI) Intel 80386, for MS Windows

    Version Info:

    LegalCopyright: Copyright (C) 1998 - 2003 GTek Technologies Ltd.
    InternalName: glfman
    FileVersion: 1, 0, 0, 10
    CompanyName: GTek Technologies Ltd.
    ProductName: GTCoach
    ProductVersion: 3, 0, 0, 1
    Translation: 0x0409 0x04b0

    Trojan:Win32/Wacatac.B!ml also known as:

    K7AntiVirusTrojan ( 005485311 )
    K7GWTrojan ( 005485311 )
    Endgamemalicious (high confidence)
    MAXmalware (ai score=81)
    SentinelOneDFI – Suspicious PE
    CrowdStrikewin/malicious_confidence_100% (D)

    How to remove Trojan:Win32/Wacatac.B!ml virus?

    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 install-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/Wacatac.B!ml 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 offers real-time protection for the first 2 days. If you want to be fully protected at all times – I can recommend you to purchase a full version:

    Full version of GridinSoft

    Full version of GridinSoft Anti-Malware

    If the guide doesn’t help you remove Trojan:Win32/Wacatac.B!ml, you can always ask me in the comments to get help.

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    1. GridinSoft Anti-Malware Review from HowToFix site:
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    About the author

    Robert Bailey

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


    1. Max R January 8, 2020
      • Robert Bailey January 8, 2020
    2. khoa May 28, 2022

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