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

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

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

Trojan:Win32/Wacatac.C!ml is a type of trojan infection that targets Windows operating systems. It belongs to the Win32/Wacatac family of trojans, known for their ability to compromise the security of affected systems.

Trojans like Trojan:Win32/Wacatac.C!ml are designed to enter a system discreetly, often through deceptive methods such as email attachments, malicious downloads, or exploiting software vulnerabilities. Once inside, they can perform various malicious activities, such as stealing sensitive information, compromising system security, or providing unauthorized access to remote attackers.

It is important to note that Trojan:Win32/Wacatac.C!ml may exhibit different behaviors depending on its specific variant or the intentions of the attacker. Common signs of infection include system slowdowns, unusual network activity, unauthorized changes to files or settings, or the presence of unfamiliar programs or processes running in the background.

To protect your system from Trojan:Win32/Wacatac.C!ml and other similar threats, it is crucial to follow best practices for computer security, such as:

  • Keep your operating system and software up to date with the latest security patches.
  • Be cautious when opening email attachments or downloading files from untrusted sources.
  • Use reputable antivirus or anti-malware software and keep it regularly updated.
  • Enable firewalls and configure them to block unauthorized network connections.
  • Exercise caution when visiting unfamiliar websites or clicking on suspicious links.

If you suspect that your system is infected with Trojan:Win32/Wacatac.C!ml, it is crucial to take immediate action. Scan your system with reliable security software to detect and remove the trojan. In severe cases, you may need to seek assistance from a professional computer security service.

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Most of the instances, Trojan:Win32/Wacatac.C!ml virus will advise its targets to launch funds move for the objective of reducing the effects of the changes that the Trojan infection has actually introduced to the target’s tool.

Trojan:Win32/Wacatac.C!ml Summary

These modifications can be as follows:

  • 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.
  • Possible date expiration check, exits too soon after checking local time;
  • Mimics the system’s user agent string for its own requests;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • 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.
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • Deletes its original binary from disk;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Installs itself for autorun at Windows startup.

    There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers located on the sufferer’s hard disk drive — so the target can no longer utilize the data;
  • Preventing regular access to the sufferer’s workstation;

Similar behavior
Related domains


One of the most regular networks through which Trojan:Win32/Wacatac.C!ml Trojans are infused are:

  • By methods of phishing emails;
  • As an effect of customer winding up on a resource that organizes a harmful software;

As soon as the Trojan is successfully infused, it will either cipher the data on the sufferer’s PC or prevent the device from functioning in a correct fashion – while additionally placing a ransom money note that states the need for the sufferers to impact the payment to decrypt the records or bring back the file system to the preliminary problem. In many instances, the ransom note will come up when the customer restarts the COMPUTER after the system has already been damaged.

Trojan:Win32/Wacatac.C!ml circulation networks.

In various corners of the globe, Trojan:Win32/Wacatac.C!ml grows by leaps and also bounds. Nonetheless, the ransom money notes and techniques of extorting the ransom quantity may vary relying on particular regional (local) settings. The ransom notes and tricks of extorting the ransom money amount might differ depending on specific local (local) setups.

Ransomware injection

As an example:

    Faulty signals about unlicensed software.

    In particular locations, the Trojans commonly wrongfully report having discovered some unlicensed applications made it possible for on the victim’s tool. The sharp then requires the user to pay the ransom money.

    Faulty statements concerning illegal content.

    In nations where software piracy is much less popular, this approach is not as efficient for the cyber scams. Conversely, the Trojan:Win32/Wacatac.C!ml popup alert might falsely declare to be stemming from a law enforcement institution as well as will report having located kid pornography or various other illegal information on the gadget.

    Trojan:Win32/Wacatac.C!ml popup alert might falsely declare to be deriving from a legislation enforcement institution and also will report having situated kid pornography or various other prohibited information on the tool. The alert will in a similar way contain a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: 19B7F805
md5: 1ceff7b90c3718c1c434896a1fde5c51
name: u6j70.exe
sha1: 237873c8c93992635ffa8048172828df274f1e1e
sha256: 3b908103f66e2925d0458787b6c66ad14ce5b050fdc8982ce637d3cd14c9cf35
sha512: f6a51fd344dca82edb9878e6f710686971cce30aae74d1a8eec3e9199394990866b7a490b5a0f5568c702a2d9c9d102af6935088246fc4a42385c50dcd800aba
ssdeep: 6144:sK1TL+6Rexa9WSU/BV5qVqc03x60Dhm+kEuS6QoJx5Xphqn3BTZeW7tbiSL:smZ9WSlk13xRDhoS8x50BUWJiSL
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright (C) 2001
InternalName: WBP
FileVersion: 1, 0, 0, 1
ProductName: WBP Application
ProductVersion: 1, 0, 0, 1
FileDescription: WBP MFC Application
OriginalFilename: WBP.EXE
Translation: 0x0409 0x04b0

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

K7GWRiskware ( 0040eff71 )
EmsisoftTrojan.Emotet (A)
Endgamemalicious (high confidence)
MAXmalware (ai score=86)
ESET-NOD32a variant of Win32/GenKryptik.EBYL
RisingTrojan.GenKryptik!8.AA55 (CLOUD)
SentinelOneDFI – Suspicious PE
CrowdStrikewin/malicious_confidence_90% (W)

How to remove Trojan:Win32/Wacatac.C!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 use GridinSoft: 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.1.

Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

Run the setup file.

When the setup file download is complete, double-click the install-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.

Run Setup.exe

A User Account Control that asks if GridinSoft Anti-Malware can make changes to your device. Therefore, click “Yes” to continue with the installation.

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Click the “Install” button.

GridinSoft Anti-Malware Install

Anti-Malware will run automatically after installation.

GridinSoft Anti-Malware Splash-Screen

Wait for the anti-malware scan to complete.

GridinSoft Anti-Malware will automatically scan your system for Trojan:Win32/Wacatac.C!Ml files and other malware. This process can take 20 to 30 minutes. I recommend checking the status of the scanning process regularly.

GridinSoft Anti-Malware Scanning

Click “Clean Now”.

When the scan is complete, the list of infections detected by GridinSoft Anti-Malware is displayed. To remove them, click the “Clean Now” button in the right corner.

GridinSoft Anti-Malware Scan Result

Are you protected?

GridinSoft Anti-Malware scans and cleans your PC for free during the test period. The free version offers real-time protection for the first 2 days. If you want to be completely protected at all times, I can recommend buying a full version:

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If the manual doesn’t help you to remove Trojan Wacatac, you can always ask me for help in the comments.

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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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