TISAK Virus ๐Ÿ” (.TISAK Files) โ€” How to Remove?

Written by Brendan Smith

The Tisak virus belongs to the ransomware type of malicious agent. A harmful program of this type encrypts all user’s data on the computer (photos, documents, excel tables, music, videos, etc) and appends its own extension to every file, leaving the Tisak_Help.txt text files in each directory which contains the encrypted files.

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Tisak virus: what is known so far?

Tisak will append its own .Tisak extension to every file’s name. For instance, an image named “photo.jpg” will be renamed to “photo.jpg.Tisak”. Just like the Excel table named “table.xlsx” will end up as “table.xlsx.Tisak”, and so forth.

In each directory containing the encoded files, a Tisak_Help.txt text file will appear. It is a ransom money memo. Therein you can find information about the ways of contacting the racketeers and some other remarks. The ransom note usually contains instructions on how to buy the decryption tool from the racketeers. You can get this decrypting software after contacting [email protected] by email. That is it.

Tisak Summary:

Name Tisak Virus
Extension .Tisak
Ransomware note Tisak_Help.txt
Contact [email protected]
Detection TrojanDownloader:Win32/Dalexis, Win32/GenCBL.DKX, Virlock.Ransom.FileInfector.DDS
Symptoms Your files (photos, videos, documents) get a .Tisak extension and you can’t open them.
Fix Tool See If Your System Has Been Affected by Tisak virus

The Tisak_Help.txt file coming in package with the Tisak malware provides the following frustrating information:

Your Network and your ESXI servers has been Encrypted by Tisak Ransomware V3.0

Your machine Id : 6C4E6C0DD6CD8727

Contact us:
Email 1 : [email protected]
Email 2 : [email protected]

This is our communication emails :
use above ID as the title of your email

Your ESXI machine which encrypted by our Dedicated Esxi-Ransomware:
a51-esx-01
a51-esx-02
a51-esx-03
a51-esx-04
a51-esx-05
a51-esx-09
a51-esx-10
a51-esx-11
a51-esx-12
and some others by windows Versions

Your ESXI encrypted By our Uniq Linux ransomware
and also after payment you will get ESXI decryptor compatible

If you don\'t pay the ransom, the data will be published on our TOR darknet sites.
Keep in mind that once your data appears on our leak site, it could be bought by your competitors at any second
so don\'t hesitate for a long time.
The sooner you pay the ransom, the sooner your company will be safe.

To confirm our honest intentions.Send 2 different random files and you will get it decrypted.
It can be from different computers on your network to be sure that one key decrypts everything.
2 files we unlock for free

You will receive btc address for payment in the reply letter

Tisak

In the image below, you can see what a directory with files encrypted by the Tisak looks like. Each filename has the “.Tisak” extension added to it.

Tisak Virus - encrypted .Tisak files

That is how encrypted “.Tisak” files look.

How did my machine catch Tisak ransomware?

There are many possible ways of ransomware infiltration.

Nowadays, there are three most popular methods for malefactors to have ransomware working in your digital environment. These are email spam, Trojan infiltration and peer-to-peer file transfer.

  • If you open your mailbox and see emails that look just like notifications from utility services providers, postal agencies like FedEx, web-access providers, and whatnot, but whose mailer is unknown to you, beware of opening those emails. They are very likely to have a ransomware item enclosed in them. Therefore, it is even riskier to download any attachments that come with emails like these.
  • Another option for ransom hunters is a Trojan virus scheme. A Trojan is an object that infiltrates into your computer pretending to be something legal. For example, you download an installer for some program you need or an update for some service. However, what is unpacked reveals itself a harmful agent that encrypts your data. Since the update wizard can have any name and any icon, you’d better be sure that you can trust the resource of the things you’re downloading. The best thing is to trust the software developers’ official websites.
  • As for the peer-to-peer networks like torrent trackers or eMule, the threat is that they are even more trust-based than the rest of the Internet. You can never know what you download until you get it. Our suggestion is that you use trustworthy websites. Also, it is reasonable to scan the directory containing the downloaded objects with the anti-malware utility as soon as the downloading is done.

How to remove ransomware?

It is important to inform you that besides encrypting your files, the Tisak virus will most likely install Vidar Stealer on your computer to get access to credentials to different accounts (including cryptocurrency wallets). That program can derive your logins and passwords from your browser’s auto-filling data.

Remove Tisak with Gridinsoft Anti-Malware

We have also been using this software on our systems ever since, and it has always been successful in detecting viruses. It has blocked the most common Ransomware as shown from our tests with the software, and we assure you that it can remove Tisak as well as other malware hiding on your computer.

Gridinsoft Anti-Malware - Main Screen

To use Gridinsoft for remove malicious threats, follow the steps below:

1. Begin by downloading Gridinsoft Anti-Malware, accessible via the blue button below or directly from the official website gridinsoft.com.

2.Once the Gridinsoft setup file (setup-gridinsoft-fix.exe) is downloaded, execute it by clicking on the file.

setup-gridinsoft-fix.exe

3.Follow the installation setup wizard's instructions diligently.

Gridinsoft Setup Wizard

4. Access the "Scan Tab" on the application's start screen and launch a comprehensive "Full Scan" to examine your entire computer. This inclusive scan encompasses the memory, startup items, the registry, services, drivers, and all files, ensuring that it detects malware hidden in all possible locations.

Scan for Tisak Ransomware

Be patient, as the scan duration depends on the number of files and your computer's hardware capabilities. Use this time to relax or attend to other tasks.

5. Upon completion, Anti-Malware will present a detailed report containing all the detected malicious items and threats on your PC.

The Tisak was Found

6. Select all the identified items from the report and confidently click the "Clean Now" button. This action will safely remove the malicious files from your computer, transferring them to the secure quarantine zone of the anti-malware program to prevent any further harmful actions.

The Tisak has been removed

8. If prompted, restart your computer to finalize the full system scan procedure. This step is crucial to ensure thorough removal of any remaining threats. After the restart, Gridinsoft Anti-Malware will open and display a message confirming the completion of the scan.

Remember Gridinsoft offers a 6-day free trial. This means you can take advantage of the trial period at no cost to experience the full benefits of the software and prevent any future malware infections on your system. Embrace this opportunity to fortify your computer's security without any financial commitment.

Trojan Killer for “Tisak” removal on locked PC

In situations where it becomes impossible to download antivirus applications directly onto the infected computer due to malware blocking access to websites, an alternative solution is to utilize the Trojan Killer application.

Trojan Killer - Main View

There is a really little number of security tools that are able to be set up on the USB drives, and antiviruses that can do so in most cases require to obtain quite an expensive license. For this instance, I can recommend you to use another solution of GridinSoft - Trojan Killer Portable. It has a 14-days cost-free trial mode that offers the entire features of the paid version. This term will definitely be 100% enough to wipe malware out.

Trojan Killer is a valuable tool in your cybersecurity arsenal, helping you to effectively remove malware from infected computers. Now, we will walk you through the process of using Trojan Killer from a USB flash drive to scan and remove malware on an infected PC. Remember, always obtain permission to scan and remove malware from a computer that you do not own.

Step 1: Download & Install Trojan Killer on a Clean Computer:

1. Go to the official GridinSoft website (gridinsoft.com) and download Trojan Killer to a computer that is not infected.

Download Trojan Killer

2. Insert a USB flash drive into this computer.

3. Install Trojan Killer to the "removable drive" following the on-screen instructions.

Install Trojan Killer to Removable Drive

4. Once the installation is complete, launch Trojan Killer.

Step 2: Update Signature Databases:

5. After launching Trojan Killer, ensure that your computer is connected to the Internet.

6. Click "Update" icon to download the latest signature databases, which will ensure the tool can detect the most recent threats.

Click Update Button

Step 3: Scan the Infected PC:

7. Safely eject the USB flash drive from the clean computer.

8. Boot the infected computer to the Safe Mode.

9. Insert the USB flash drive.

10. Run tk.exe

11. Once the program is open, click on "Full Scan" to begin the malware scanning process.

Searching Tisak Virus

Step 4: Remove Found Threats:

12. After the scan is complete, Trojan Killer will display a list of detected threats.

Searching Tisak Finished

13. Click on "Cure PC!" to remove the identified malware from the infected PC.

14. Follow any additional on-screen prompts to complete the removal process.

Restart needed

Step 5: Restart Your Computer:

15. Once the threats are removed, click on "Restart PC" to reboot your computer.

16. Remove the USB flash drive from the infected computer.

Congratulations on effectively removing Tisak and the concealed threats from your computer! You can now have peace of mind, knowing that they won't resurface again. Thanks to Gridinsoft's capabilities and commitment to cybersecurity, your system is now protected.

Often criminals would unblock some of your files so you know that they do have the decryption program. As Tisak virus is a relatively new ransomware, anti-malware designers have not yet found a method to reverse its work. Nevertheless, the decryption instruments are constantly upgraded, so the solution may soon arrive.

Of course, if the criminals succeed in encrypting victim’s critical files, the desperate person will most likely fulfill their demands. Despite that, paying a ransom gives no guarantee that you’re getting your files back. It is still risky. After getting the money, the racketeers may send a wrong decryption code to the victim. There were reports about criminals just vanishing after getting the ransom without even bothering to reply.

The best safety measure against ransomware is to have a system restore point or the copies of your essential files in the cloud drive or at least on an external storage. Surely, that might be insufficient. The most crucial thing could be that one you were working upon when it all went down. Nevertheless, it is something. It is also wise to scan your PC for viruses with the antivirus program after the OS is rolled back.

Tisak is not the only ransomware of its kind, since there are other specimens of ransomware out there that act in the same manner. For instance, Chocvm, Cdmx, Cdqw, and some others. The two major differences between them and the Tisak are the ransom amount and the method of encryption. The rest is the same: files become encoded, their extensions changed, ransom notes are created in each folder containing encrypted files.

Some fortunate people were able to decrypt the blocked files with the aid of the free software provided by anti-ransomware specialists. Sometimes the racketeers accidentally send the decryption key to the wronged in the ransom readme. Such an extraordinary fail allows the victim to restore the files. But obviously, one should never rely on such a chance. Make no mistake, ransomware is a criminals’ technology to lay their hands on the money of their victims.

How to avert ransomware injection?

Tisak ransomware doesnโ€™t have a superpower, neither does any similar malware.

You can protect your PC from its infiltration in several easy steps:

  • Never open any emails from unknown mailboxes with unknown addresses, or with content that has nothing to do with something you are waiting for (can you win in a lottery without participating in it?). If the email subject is more or less something you are expecting, scrutinize all elements of the questionable email carefully. A hoax letter will surely have a mistake.
  • Avoid using cracked or untrusted programs. Trojan viruses are often shared as an element of cracked products, possibly as a โ€œpatchโ€ which prevents the license check. But potentially dangerous programs are very hard to tell from reliable software, as trojans may also have the functionality you need. You can try to find information about this program on the anti-malware message boards, but the optimal solution is not to use such software.
  • And finally, to be sure about the safety of the objects you downloaded, use GridinSoft Anti-Malware. This software will be a powerful armor for your PC.

Frequently Asked Questions

๐Ÿค” How can I open “.Tisak” files?Is it possible to openโ€œ.Tisakโ€ files?

There’s no way to do it, unless the files “.Tisak” files are decrypted.

๐Ÿค” The encrypted files are very important to me. How can I decrypt them quickly?

Hopefully, you have made a copy of those important files. In case you haven’t, there is still a chance that you do have a Restore Point from some time ago to roll back the whole system to the moment when it had no virus yet, but already had your files. The rest of the methods require patience.

๐Ÿค” Will GridinSoft Anti-Malware remove all the encrypted files alongside the Tisak virus?

Of course not. The encrypted files are not harmful, so they won’t be deleted.

GridinSoft Anti-Malware only deals with real viruses. The virus that has infected your device is probably still functional and it scans your system from time to time to encode any new files you might create on your PC after the attack. As it has been mentioned above, the Tisak virus comes with the company. It installs backdoors and keyloggers that can take your account passwords by trespass and provide hackers with easy access to your computer after some time.

๐Ÿค” What should I do if the Tisak ransomware has blocked my PC and I can’t get the activation key.

If that happened, you need to have a flash memory card with a previously installed Trojan Killer. Use Safe Mode to execute the procedure. You see, the ransomware runs automatically as the system launches and encrypts any new files created or imported into your computer. To stop this function – use Safe Mode, which allows only the vital programs to run upon system boot. Consider reading our manual on booting Windows in Safe Mode.

๐Ÿค” What could help the situation right now?

Some of the blocked files can be located elsewhere.

  • If you exchanged your important files by email, you could still download them from your online mail server.
  • You may have shared images or videos with your friends or family members. Simply ask them to post those pictures back to you.
  • If you have initially downloaded any of your files from the Internet, you can try doing it again.
  • Your messengers, social networks pages, and cloud disks might have all those files too.
  • It might be that you still have the needed files on your old computer, a portable device, phone, external storage, etc.

USEFUL TIP: You can use data recovery programs1 to retrieve your lost information since ransomware encodes the copies of your files, removing the original ones. In the video below, you can learn how to use PhotoRec for such a restoration, but be advised: you won’t be able to do it before you kill the virus with an anti-malware program.

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Brendan Smith
How to Remove TISAK Ransomware & Recover PC

Name: TISAK Virus

Description: TISAK Virus is a ransomware-type infections. This virus encrypts important personal files (video, photos, documents). The encrypted files can be tracked by a specific .Tisak extension. So, you can't use them at all.

Operating System: Windows

Application Category: Virus

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References

  1. Here are Top 10 Data Recovery Software Of 2023.

About the author

Brendan Smith

I'm Brendan Smith, a passionate journalist, researcher, and web content developer. With a keen interest in computer technology and security, I specialize in delivering high-quality content that educates and empowers readers in navigating the digital landscape.

With a focus on computer technology and security, I am committed to sharing my knowledge and insights to help individuals and organizations protect themselves in the digital age. My expertise in cybersecurity principles, data privacy, and best practices allows me to provide practical tips and advice that readers can implement to enhance their online security.

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