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

Remove Trojan:Win32/Wacatac.D!ml
Written by Robert Bailey

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

In this article you will certainly find concerning the definition of Trojan:Win32/Wacatac.D!ml as well as its negative influence on your computer. This virus can be correctly identified as spyware – virus that steals your credentials, information about your PC and installed programs.

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.
Gridinsoft Anti-Malware 6-day trial available.
EULA | Privacy Policy | 10% Off Coupon
Subscribe to our Telegram channel to be the first to know about news and our exclusive materials on information security.

In the majority of the situations, Trojan:Win32/Wacatac.D!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.D!ml Summary

These alterations can be as follows:

  • A process attempted to delay the analysis task.;
  • Attempts to connect to a dead IP:Port (1565 unique times);
  • 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.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • Uses Windows utilities for basic functionality;

Trojan:Win32/Wacatac.D!ml visible effects

After being successfully injected, Wacatac Trojan changes your hosts file. This file contains the data about priority DNS addresses for specified websites. Trojan adds anti-malware forums, anti-malware software vendors sites, and advisory sites, like this one, to the hosts, specifying DNS-address of (the address of your PC in the local network). Hence, every time you’d try to open these sites, your browser will try to connect to and show that there is no connection to the server.

Here is the list of the websites which are usually added to the hosts file by Wacatac Trojan :


Fortunately, hosts file may be easily fixed manually. It is located at %SystemRoot%\drivers\etc\ and may be opened with a Notepad.

This malware can also disable Windows updates. The mechanism is the same as for anti-malware sites: Wacatac adds a Microsoft update server to the host’s file, and then your PC will not have the ability to connect to this server and get any updates.

The trojan-activity may be spotted in the Task Manager. Wacatac Trojan runs the following processes :

  • “%User Temp%\2ce0441691b70fb6a6a53618c1e7590c54f00a10.exe”
  • %System%\lsass.exe
  • %Windows%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe

All these processes consume a lot of your PC’s resources, so you will find them easily in Task Manager. And they are quite hard to stop: every time you try to stop them with the proper Task Manager button, they will disappear for several seconds, then appear again.

The reason for such immortality is that Wacatac Trojan creates several scripts, which are tracking the correct execution of mentioned processes. And these scripts are hidden somewhere deep in your file system. Every time one of the processes disappears, these scripts start again. That’s why it’s better to use the method we are offering below than to try to deal with Wacatac by yourself.

In process of it’s activity, Wacatac connects to “http://{BLOCKED}”. We have no information about this URL’s purpose, but it looks like the Trojan collects some of your data and then sends it to this website.

Trojan:Win32/Wacatac.D!ml creates several additional folders in your file system. These folders are usually located through Windows files on the C disc, so it can be quite hard to find them, especially considering the usual amount of folders created by Windows.

The Wacatac Trojan can also delete some of your system files! The most frequent action is lastgood.tmp file removal. This file is created by Windows every time you are installing the program, which changes the system files (i.e., registry or so) and contains the backup of system files changed. If something goes wrong, your system will perform self-repairing using this file. And since the Wacatac Trojan deleted this file, no restoration appears to be available.

Registry editing usually contains of creating the additional entry to the RunOnce key. After this operation, Wacatac Trojan will launch together with your system, regardless of the trojan’s manual launch. The malware, which is launching in such a way, maybe stopped only with safe mode launch with command prompt support.

Besides the RunOnce key, Wacatac also changes the following registry key :

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dnscache Type = "16"

The profit which trojan gets by editing this key is unknown. However, the possible effects for the Windows functionality are unknown, too.

Any registry changes are dangerous at all if a professional user does not implement them. And these changes may be especially dangerous if malicious programs do them. Trojan’s target is not only your data: it also tries to create chaos and make it impossible to do any actions on your PC. So, it may break your registry purposely.

Trojan:Win32/Wacatac.D!ml has several habits that are more typical for browser hijacker than for trojan. Wacatac usually changes your browser settings, setting your homepage to Yahoo, for example, and redirecting your search queries to the doorway websites.

Ransomware injection

Trojan:Win32/Wacatac.D!ml distribution networks.

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

  • Email spam
  • Unlicensed software usage
  • Malvertising on the Web

For example:

    Popular ways of the Trojan:Win32/Wacatac.D!ml injection

    You can get the Trojan:Win32/Wacatac.D!ml on your PC in different ways. But one of the most popular ways of Wacatac injection is crackware. No one can warrant that the user who cracked the program hasn’t added any additional and undeclared programs to the installation file.

    Besides an injection as a pack with crack, Trojan:Win32/Wacatac.D!m can also arrive in your system after other malware dropped a file. This file is run autonomously. Hence the Wacatac trojan will get to your PC without any signs.

    We also got several reports about Wacatac injection from doorway/advertisement website. Adware, which is guilty of this website’s opening, may show you the ad that has a link to Wacatac Trojan downloading. All these actions look easy to avoid, but these advertisements may appear every moment, overlaying all other windows, so you can just misclick and start downloading an unwanted application.

    Due to the statistic, there is one adware that will surely show you an ad with the link to Wacatac downloading. We are talking about Uwasson adware. That is the “classic” adware, which changes your search engine, opens additional windows with advertisements, and redirects your search query to the doorway websites.

    Faulty notifies about unlicensed software.

    In certain areas, the Trojans usually wrongfully report having detected some unlicensed applications allowed on the victim’s gadget. The sharp after that demands the customer to pay the ransom.

    Faulty declarations regarding prohibited content.

    In countries where software piracy is much less preferred, this technique is not as reliable for cyber frauds. Additionally, the Trojan:Win32/Wacatac.D!ml popup alert may incorrectly claim to originate from a law enforcement organization and report having situated kid pornography or other prohibited data on the device.

    Trojan:Win32/Wacatac.D!ml popup alert might incorrectly claim to be deriving from a regulation enforcement organization and also will report having located youngster porn or various other unlawful information on the device. The alert will likewise consist of a requirement for the individual to pay the ransom.

Technical details

File Info:

crc32: 166ADDAF
md5: 01a9b1f9a9db526a54a64e39a605dd30
name: c.dat
sha1: a436e3f5a9ee5e88671823b43fa77ed871c1475b
sha256: 9a1365c42f4aca3e9c1c5dcf38b967b73ab56e4af0b4a4380af7e2bf185478bc
sha512: 5e9bb40b47c3a1a036ede25b3d1b7bbb4da2f048145fa1f3aaeccca11df88c108429b5bb859ab6da888c9e8ee6da2b1040d7341426e5776dbf5c3fa8ab9dd90f
ssdeep: 49152:HukzsCYr5TZNnFiL/FUEA0x2YBp4j8VThthc48Lezv:Ok4CwJsL/HAFYBp4jMM48Le
type: MS-DOS executable, MZ for MS-DOS

Version Info:

0: [No Data]

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

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware
MicroWorld-eScan Dropped:Trojan.GenericKD.32937697
CAT-QuickHeal Trojan.Agent
ALYac Trojan.Ransom.Satan
Cylance Unsafe
AegisLab Trojan.Win32.Eb.4!c
Sangfor Malware
K7AntiVirus Trojan ( 004f40381 )
BitDefender Dropped:Trojan.GenericKD.32937697
K7GW Trojan ( 004f40381 )
Cybereason malicious.5a9ee5
TrendMicro TROJ_GEN.R002C0WAD20
BitDefenderTheta Gen:NN.ZexaF.34082.koqaaevOgYoi
Symantec Trojan.Gen.2
ESET-NOD32 a variant of Win64/Riskware.Mimikatz.B
TrendMicro-HouseCall TROJ_GEN.R002C0WAD20
Avast Win32:Malware-gen
GData Dropped:Trojan.GenericKD.32937697
Kaspersky Trojan.Win32.Eb.acs
Alibaba Trojan:Win32/Mimikatz.f53cba30
APEX Malicious
Rising Trojan.Eb!8.10DCC (CLOUD)
Ad-Aware Dropped:Trojan.GenericKD.32937697
Sophos Mal/Generic-S
F-Secure Trojan.TR/Crypt.XPACK.Gen
DrWeb BackDoor.Siggen2.2089
Invincea heuristic
CMC Virus.Win32.Sality!O
Emsisoft Dropped:Trojan.GenericKD.32937697 (B)
SentinelOne DFI – Malicious PE
Cyren W32/Trojan.CHUK-0891
Avira TR/Crypt.XPACK.Gen
MAX malware (ai score=85)
Endgame malicious (high confidence)
Arcabit Trojan.Generic.D1F696E1
ZoneAlarm Trojan.Win32.Eb.acs
Microsoft Trojan:Win32/Wacatac.D!ml
Acronis suspicious
McAfee Artemis!01A9B1F9A9DB
VBA32 Trojan.Eb
Malwarebytes Trojan.MalPack.MPRESS
Panda Trj/CI.A
Tencent Win32.Trojan.Eb.Eer
Fortinet Riskware/Mimikatz
AVG Win32:Malware-gen
CrowdStrike win/malicious_confidence_100% (W)
Qihoo-360 Win32/Trojan.113

How to remove Trojan:Win32/Wacatac.D!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.D!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 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

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

User Review
0 (0 votes)
Comments Rating 0 (0 reviews)


  1. GridinSoft Anti-Malware Review from HowToFix site:
  2. More information about GridinSoft products:

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.

Leave a Reply