Jigsaw Ransomware: A Dangerous Game You Don't Want to Play
If you are a fan of horror movies, you might have heard of the Saw franchise, where a serial killer named Jigsaw traps his victims in deadly games and forces them to make gruesome choices to survive. Well, there is a ransomware that is inspired by this character and uses his image and voice to taunt its victims. It is called Jigsaw ransomware, and it is one of the most malicious and destructive ransomware out there.
In this article, we will explain what Jigsaw ransomware is, how it works, how it spreads, and how you can protect yourself from it. We will also show you how to remove Jigsaw ransomware and decrypt your files if you are unlucky enough to get infected by it.
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What is Jigsaw Ransomware?
Jigsaw ransomware is a form of encrypting ransomware malware that was created in 2016. It was initially titled "BitcoinBlackmailer", but later came to be known as "Jigsaw" due to featuring an image of Billy the Puppet from the Saw film franchise.
The malware encrypts computer files and gradually deletes them, demanding payment of a ransom to decrypt the files and halt the deletion. The ransom amount varies from $20 to $300, and it has to be paid in Bitcoin. The ransom note also provides a link on where to buy Bitcoin, but no instructions on how to decrypt the files.
What makes Jigsaw ransomware different from other ransomware is its unique way of persuading victims to comply. If the ransom is not paid within one hour, one file will be deleted. Following this, for each hour without a ransom payment, the amount of files deleted is exponentially increased each time from a few hundred to thousands of files until the computer is wiped after 72 hours. Any attempt to reboot the computer or terminate the process will result in 1,000 files being deleted.
A further updated version of Jigsaw ransomware also makes threats to dox the victim by revealing their personal information online.
How Does Jigsaw Ransomware Work?
How Does Jigsaw Ransomware Encrypt Files?
Jigsaw ransomware scans your computer for images, videos, documents, and other important files and encrypts them with AES encryption. It also changes their extensions to random ones, such as .FUN, .BTC, .YOLO, or .GWS. It does not encrypt executable files or system files.
Jigsaw ransomware also encrypts your master boot record (MBR), which prevents your computer from booting normally. It then displays a full-screen window with a countdown timer, a picture of Billy the Puppet, and a message that explains the situation and demands the ransom.
The message also includes an audio file that plays the voice of Jigsaw saying "I want to play a game" and other phrases from the Saw movies.
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How Does Jigsaw Ransomware Delete Files?
Jigsaw ransomware deletes files by overwriting them with random data and then deleting them permanently. This makes it impossible to recover them with data recovery software.
Jigsaw ransomware deletes files according to a schedule that depends on the time elapsed since the infection. The schedule is as follows:
Time elapsedFiles deleted
1-2 hours1 file
2-3 hours2 files
3-4 hours4 files
4-5 hours8 files
5-6 hours16 files
6-7 hours32 files
7-8 hours64 files
8-9 hours128 files
9-10 hours256 files
10-11 hours512 files
11-12 hours1,024 files
12-24 hours2,000 files every hour
24-48 hours4,000 files every hour
48-72 hoursAll remaining files
How Does Jigsaw Ransomware Spread?
Jigsaw ransomware spreads mainly through spam emails that contain malicious attachments or links. The attachments are usually disguised as invoices, receipts, resumes, or other documents that might trick the user into opening them. The links are usually shortened or obfuscated to hide their true destination.
Jigsaw ransomware can also spread through peer-to-peer networks, such as BitTorrent, where it can be downloaded as a fake or cracked software. It can also infect computers through exploit kits, which are malicious web pages that exploit vulnerabilities in browsers or plugins.
How to Protect Yourself from Jigsaw Ransomware?
Use a Reliable Antivirus Software
The best way to protect yourself from Jigsaw ransomware is to use a reliable antivirus software that can detect and block malicious files and processes. You should also keep your antivirus software updated with the latest virus definitions and patches.
You should also enable the real-time protection feature of your antivirus software, which can scan and monitor your system for any suspicious activity. You should also perform regular scans of your computer and removable devices for any potential threats.
Avoid Opening Suspicious Email Attachments
Another way to protect yourself from Jigsaw ransomware is to avoid opening suspicious email attachments or clicking on unknown links. You should always check the sender's address, the subject line, and the message body for any signs of phishing or spam. You should also hover over the links to see where they lead before clicking on them.
If you are not sure about the legitimacy of an email attachment or link, you should delete it or report it as spam. You should also never enable macros or scripts in documents that you receive via email, as they can execute malicious code on your computer.
Backup Your Data Regularly
The last way to protect yourself from Jigsaw ransomware is to backup your data regularly to an external device or a cloud service. This way, even if your computer gets infected by Jigsaw ransomware, you can still restore your files from a backup without paying the ransom.
You should also disconnect your backup device or service from your computer when not in use, as Jigsaw ransomware can also encrypt and delete your backup files if they are connected to your computer.
How to Remove Jigsaw Ransomware and Decrypt Your Files?
Use a Decryption Tool
If you are infected by Jigsaw ransomware, you might be able to decrypt your files using a decryption tool that was created by security researchers. The decryption tool can be downloaded from [here].
The decryption tool works by finding the encryption key that Jigsaw ransomware uses to encrypt your files. The encryption key is stored in a file named "EncryptedFileList.txt" in the same folder as the ransomware executable. The decryption tool can scan your computer for this file and use it to decrypt your files.
Use a Malware Removal Tool
To remove Jigsaw ransomware from your computer, you need to use a malware removal tool that can scan and remove Jigsaw ransomware and other malware from your system. You can download a free malware removal tool from [here](^2^) or [here](^4^).
A malware removal tool can also help you restore your MBR and fix any other system issues caused by Jigsaw ransomware. You should run a full system scan with the malware removal tool and follow the instructions to remove Jigsaw ransomware and any other threats.
Restore Your Files from a Backup
If you have a backup of your files that was not affected by Jigsaw ransomware, you can restore your files from it after removing the malware from your computer. You can use a backup device or a cloud service to restore your files, depending on where you stored your backup.
You should also make sure that your backup is clean and does not contain any traces of Jigsaw ransomware or other malware. You can scan your backup with a malware removal tool before restoring your files.
Conclusion
Jigsaw ransomware is a dangerous and destructive malware that encrypts and deletes your files while taunting you with the image and voice of Jigsaw from the Saw movies. It spreads mainly through spam emails, peer-to-peer networks, and exploit kits.
To protect yourself from Jigsaw ransomware, you should use a reliable antivirus software, avoid opening suspicious email attachments or links, and backup your data regularly. To remove Jigsaw ransomware and decrypt your files, you should use a decryption tool, a malware removal tool, and a backup.
We hope this article has helped you understand what Jigsaw ransomware is, how it works, how it spreads, and how you can protect yourself from it. If you have any questions or comments, please feel free to leave them below.
FAQs
What is the difference between encryption and deletion?
Encryption is the process of transforming data into an unreadable format using a secret key. Deletion is the process of removing data from a storage device. Encryption does not erase data, but makes it inaccessible without the key. Deletion does not make data inaccessible, but makes it recoverable with special software.
How can I tell if my computer is infected by Jigsaw ransomware?
Some signs that your computer is infected by Jigsaw ransomware are:
Your files have random extensions, such as .FUN, .BTC, .YOLO, or .GWS.
Your computer does not boot normally and shows a full-screen window with a countdown timer, a picture of Billy the Puppet, and a ransom note.
You hear the voice of Jigsaw saying "I want to play a game" and other phrases from the Saw movies.
Your files are gradually deleted every hour or every time you reboot or terminate the process.
Can I trust Jigsaw ransomware to decrypt my files after paying the ransom?
No, you cannot trust Jigsaw ransomware to decrypt your files after paying the ransom. There is no guarantee that the hackers behind Jigsaw ransomware will provide you with the decryption key or tool after receiving your payment. They might also demand more money or infect your computer with more malware. Therefore, we do not recommend paying the ransom to Jigsaw ransomware.
Can I prevent Jigsaw ransomware from deleting my files?
No, you cannot prevent Jigsaw ransomware from deleting your files once it has infected your computer. The only way to stop the deletion process is to pay the ransom or remove the malware from your system. However, paying the ransom is not advised, as it does not guarantee decryption or removal. Therefore, the best way to prevent Jigsaw ransomware from deleting your files is to protect yourself from getting infected in the first place.
Where can I download Jigsaw ransomware?
You should not download Jigsaw ransomware or any other malware for any reason. Downloading Jigsaw ransomware will only harm your computer and data, and expose you to cybercriminals. If you are looking for educational or research purposes, you should use a safe and isolated environment, such as a virtual machine or a sandbox. However, we do not recommend downloading Jigsaw ransomware at all. 44f88ac181
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