How to uninstall Strigoi Master RAT?

Also Known As: Strigoi Master remote access trojan
Type: Trojan
Damage level: Severe

What is Strigoi Master?

A Remote Access Trojan (RAT) is a malicious software that allows the attackers to monitor and control infected computers (or networks). They can open documents or any other files, download and install software, access webcam, microphone, etc.

Usually, cybercriminals use RATs to infect computers with malware and (or) to obtain sensitive information that could be used for malicious purposes. Strigoi Master is written in Java programming language. It can be purchased on hacker forums, its monthly subscription costs $80, and its 3-month subscription costs $200.

Strigoi Master malware

Research shows that Strigoi Master can restart and shut down the infected machine, execute commands via Command Prompt and PowerShell, manage files (e.g., rename, delete, move, duplicate), log keystrokes (record keyboard input), download and execute various files.

Usually, cybercriminals use the aforementioned features to download and install cryptocurrency miners, ransomware, or other malware. Also, they use them to obtain login credentials (usernames, email addresses, passwords), credit card details, bank account numbers, social security numbers, and other sensitive information.

It is important to mention that they often use obtained credentials to steal personal accounts that could be used to send phishing emails, trick other users into making money transactions, make fraudulent transactions, purchases, and for other purposes. It is also possible that Strigoi Master could be used to access webcam and record videos that could be used to blackmail victims.

In conclusion, Strigoi Master is RAT that can be the reason behind monetary and data loss, identity theft, loss of access to personal accounts, computer, problems with online privacy, and other issues. Users who suspect its presence should remove it from the operating system immediately.

Threat Summary:
Name Strigoi Master remote access trojan
Threat Type Remote Access Trojan, Spyware, Keylogger
Detection Names Arcabit (Java.Trojan.GenericGB.D71E2), BitDefender (Java.Trojan.GenericGB.29154), Emsisoft (Java.Trojan.GenericGB.29154 (B)), Kaspersky (HEUR:Trojan.Java.Agent.gen), Microsoft (Trojan:Script/Wacatac.B!ml), Full List (VirusTotal)
Payload $80 (monthly), $200 (three-month subscription)
Symptoms Remote Administration Trojans are designed to stealthily infiltrate the victim's computer and remain silent, and thus no particular symptoms are clearly visible on an infected machine.
Distribution methods Infected email attachments, malicious online advertisements, social engineering, software 'cracks'.
Damage Stolen passwords and banking information, identity theft, the victim's computer added to a botnet.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
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There are many different RATs. Some examples are ObliqueRAT, Elephant RAT, Orcus RAT, ViperSoftX RAT. It is common that the attackers have anonymous control over infected computers - victims are not aware that they have a RAT installed on their machines.

It is worthwhile to mention that RATs can be used to perform DDoS attacks and the infected network as a proxy server for fraudulent activities. In one way or another, when there is any reason to suspect that a system is infected with a RAT, then it should be scanned with a security suite, and all detected threats should be removed as soon as possible.

How did Strigoi Master infiltrate my computer?

Typically, cybercriminals use malspam, questionasble channels for downloading software, certain Trojans, fake software updaters, and 'cracking' tools (unofficial activators) to distribute malware. It is common that the attackers send emails containing malicious attachments that, if opened, install malicious software.

Examples of files that cybercriminals attach to their malspam emails are malicious Microsoft Office documents, PDF documents, ZIP, RAR and other archive files, JavaScript files, executable files (like .exe). Their emails can contain download links for malicious files as well.

Another way to distribute malware is to trick users into downloading malicious files via Peer-to-Peer networks (e.g., torrent clients, eMule), freeware download websites, third-party downloaders, free file hosting pages and other similar tools. In order to trick users into downloading (and opening) those file cybercriminals design them to look like legitimate files.

Trojans can be designed to open function as backdoor malware. Once they are injected into the system, they can start causing chain infections/installing additional malware. Fake updaters, if used, cause damage in one of these ways: by installing malicious programs instead of updating, fixing installed programs, or by exploiting bugs, flaws of installed programs that are not up to date.

Software 'cracking' tools are illegal programs that are supposed to activate licensed software (bypass its activation). Sometimes these tools work as they are expected to, however, not always. It is common for them to be bundled with malware.

How to avoid installation of malware?

Received emails that are not relevant, and sent from suspicious addresses should be ignored. Especially if these emails have some file attached to them, or include a website link. Very often, such emails are used by cybercriminals as channels to deliver malicious programs.

Programs (and files) should be downloaded from legitimate, reliable sources such as official websites and direct links. It is not safe to open downloads that came from unofficial pages, third party downloaders, Peer-to-Peer networks, free file hosting sites, and so on.

Moreover  installed software has to be updated or activated with tools or using functions that the official developers provide (have designed). Third-party activation or updating tools tend to be used to trick users into installing malware - those tools often are bundled with malicious software.

Another problem with unofficial tools that are supposed to activate software is that it is not legal to use them to activate software. One more way to protect computers is to scan them with a reputable antivirus or anti-spyware software.

It is to run system scans regularly. If you believe that your computer is already infected, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.

Screenshots of images used to advertise Strigoi Master:

strigoi master rat image used for strigoi master promotion 1 strigoi master rat image used for strigoi master promotion 2

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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How to remove malware manually?

Manual malware removal is a complicated task - usually it is best to allow antivirus or anti-malware programs to do this automatically. To remove this malware we recommend using Combo Cleaner Antivirus for Windows.

If you wish to remove malware manually, the first step is to identify the name of the malware that you are trying to remove. Here is an example of a suspicious program running on a user's computer:

malicious process running on user's computer sample

If you checked the list of programs running on your computer, for example, using task manager, and identified a program that looks suspicious, you should continue with these steps:

manual malware removal step 1Download a program called Autoruns. This program shows auto-start applications, Registry, and file system locations:

screenshot of autoruns application

manual malware removal step 2Restart your computer into Safe Mode:

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu".

Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options".

In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":


manual malware removal step 3Extract the downloaded archive and run the Autoruns.exe file.

extract autoruns.zip and run autoruns.exe

manual malware removal step 4In the Autoruns application, click "Options" at the top and uncheck "Hide Empty Locations" and "Hide Windows Entries" options. After this procedure, click the "Refresh" icon.

Click 'Options' at the top and uncheck 'Hide Empty Locations' and 'Hide Windows Entries' options

manual malware removal step 5Check the list provided by the Autoruns application and locate the malware file that you want to eliminate.

You should write down its full path and name. Note that some malware hides process names under legitimate Windows process names. At this stage, it is very important to avoid removing system files. After you locate the suspicious program you wish to remove, right click your mouse over its name and choose "Delete".

locate the malware file you want to remove

After removing the malware through the Autoruns application (this ensures that the malware will not run automatically on the next system startup), you should search for the malware name on your computer. Be sure to enable hidden files and folders before proceeding. If you find the filename of the malware, be sure to remove it.

searching for malware file on your computer

Reboot your computer in normal mode. Following these steps should remove any malware from your computer. Note that manual threat removal requires advanced computer skills. If you do not have these skills, leave malware removal to antivirus and anti-malware programs.

These steps might not work with advanced malware infections. As always it is best to prevent infection than try to remove malware later. To keep your computer safe, install the latest operating system updates and use antivirus software.

To be sure your computer is free of malware infections, we recommend scanning it with Combo Cleaner Antivirus for Windows.

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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

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