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. Such ransomware are a type of malware that is elaborated by on-line scams to require paying the ransom by a target.

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In the majority of the situations, Trojan:Win32/Wacatac.D!ml infection will advise its victims to launch funds transfer for the function of counteracting the amendments that the Trojan infection has presented to the sufferer’s gadget.

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;
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • The binary likely contains encrypted or compressed data.;
  • Uses Windows utilities for basic functionality;
  • Ciphering the documents situated on the target’s disk drive — so the sufferer can no more use the information;
  • Preventing normal accessibility to the target’s workstation;

Trojan:Win32/Wacatac.D!ml

The most typical channels whereby Trojan:Win32/Wacatac.D!ml Ransomware are infused are:

  • By methods of phishing e-mails;
  • As a consequence of user winding up on a source that organizes a malicious software application;

As quickly as the Trojan is efficiently infused, it will either cipher the information on the victim’s PC or avoid the device from functioning in a correct manner – while also placing a ransom money note that points out the requirement for the victims to effect the repayment for the purpose of decrypting the files or restoring the documents system back to the initial problem. In a lot of instances, the ransom note will certainly show up when the client reboots the PC after the system has actually already been harmed.

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 127.0.0.1 (the adress of your PC in the local network). Hence, every time you’d try to open these sites, your browser will try to connect to 127.0.0.1 and show that there is no connection to the server.

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

  • kaspersky.com
  • bleepingcomputer.com
  • howtofix.guide
  • malwarebytes.com
  • norton.com
  • mcafee.com

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 Microsoft update server to hosts file, and then your PC will not have an 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 this 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 proper Task Manager button, they will disappear for several seconds, then appear again.

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

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

Trojan:Win32/Wacatac.D!ml creates several additional folders in your file system. This 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 often 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 avaliable.

Registry editing usually contains of creating the addtional entry to the RunOnce key. After this operation, Wacatac Trojan will launch together with your system, regardless of manual launch of the trojan. The malware, which is launching in such way, may be 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 they are not implemented by a professional user. And this changes may be especially dangerous if they’re done by malicious program. Trojan’s target is not only your data : it also tries to create chaos and make impossible doing 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, then for trojan. Wacatac usually changes your browser settings, setting your homepage to Yahoo, for example, and redirecting your search queries to the doorway websites.

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

In numerous corners of the globe, Trojan:Win32/Wacatac.D!ml grows by jumps and bounds. Nonetheless, the ransom money notes and also methods of obtaining the ransom money quantity might differ relying on certain regional (local) setups. The ransom money notes as well as tricks of obtaining the ransom money quantity might differ depending on certain neighborhood (regional) setups.

Ransomware injection

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 haven’t add any additional and undeclared programs to the installation file.

    Besides an injection as a pack with crackware, Trojan:Win32/Wacatac.D!m can also arrive to you 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 for this websites opening, may show you the ad, that have a link to Wacatac Trojan downloading. All this actions looks like easy to avoid, but this 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 you search engine, opens additional windows with advetiserments 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 the cyber frauds. Additionally, the Trojan:Win32/Wacatac.D!ml popup alert may incorrectly claim to be originating from a law enforcement organization and also will 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
FireEye Generic.mg.01a9b1f9a9db526a
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
McAfee-GW-Edition BehavesLike.Win32.VTFlooder.vc
CMC Virus.Win32.Sality!O
Emsisoft Dropped:Trojan.GenericKD.32937697 (B)
SentinelOne DFI – Malicious PE
Cyren W32/Trojan.CHUK-0891
Jiangmin Trojan.Crypmod.vn
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
Paloalto generic.ml
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.
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There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft2.

Download GridinSoft Anti-Malware.

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

Run the setup file.

When 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 a 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 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/Wacatac.D!ml you can always ask me in the comments for getting help.

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References

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