Ransomware | 06/07/2019

Poret ransomware – A new threat for internet users

About: Poret ransomware is a newly discovered threat for computer users. It encrypts the file using ‘poret’ extension and makes them unusable. The newbie ransomware will ask for large ransom, in order to decrypt your data.

| Ransomware | Poret ransomware – A new threat for internet users

Guide to remove Poret Ransomware

The Poret ransomware is a new strain of ‘Djvu ransomware family’. Discovered by Michael Gillespie, this new ransomware is a high-risk file encrypting infection. The recent ransomware attacks the following versions of Windows OS:

  • Windows 7
  • Windows 8
  • Windows 10



Threat Summary

Name Poret
Type Ransomware
Category Malware
Targeted OS Windows
Targeted Browser Internet Explorer, Google Chrome, Firefox


Understanding Poret ransomware

The Poret ransomware aims to extort money in tricky way. It encrypts your important files/documents and makes them inaccessible. Ransom in the form of bitcoins (crypto currency) is demanded in exchange of your data.

‘.poret’ extension is attached by Poret ransomware to the encrypted files. The additional extension makes the files unusable.  At the same time, a document named ‘readme.txt’ is created in folders containing encrypted files.

This document contains the ransom demanding message and notifies the victim about the ransomware attack. This ransomware creates a unique key to restore the encrypted files. Unfortunately, the key is created on the server of cyber criminals.

Hence, the victims believe that the only way out is to pay the ransom. However the reality is different! There is no guarantee that your data will be decrypted, even after paying the asked ransom. So, if you do not want to waste money, you should delete Poret ransomware from your system.

Threat Behavior

  • Symptoms:

Once the Poret ransomware infects your files, it changes their extensions. The corrupted files are no longer accessible by you. Whenever you try to open the files, it will display a ransom demanding message on your screen. In order to access your encrypted files, you have to pay the asked ransom.

  • Targeted Files:

The list of file that Poret ransomware targets include –

  1. Document Files (.docx, .doc, .odt, .rtf, .txt, .pdf, .htm, .ppt)
  2. Audio Files (.mp3, .aif, .iff, .m3u, .m4u, .mid, .mpa, .wma, .ra, .avi, .mov, .mp4)
  3. Images (.jpg, .jpg, .raw, .tif, .gif, .png)
  4. Video Files (.3gp, .mpeg, .3g2, .asf, .asx, .flv, .mpg, .wmv, .vob)
  • Ransom Note:

After encrypting your files, the Poret ransomware virus leaves a ransom note text file. Usually named as ‘readme.txt’, this file displays a message demanding ransom, every time you try to open the encrypted file. It offers the users on how to get the decryption key in exchange of ransom.

Ransom-Demanding Message:

Ransom Note

  • Payment Method:

There are numerous methods available for hackers to collect the ransom. A few of them are Litcoin, Zcash, Dash, Bitcoin and Peercoin. Among all the crypto currencies available, Bitcoin is the most used method for ransom collection. Bitcoins are a form of electronic cash and these are easier than any other form.

  • Ransom Amount:

A sum of 0.13 bitcoin ($980) is demanded for the decryption key. However, the victim can reduce the sum to half i.e. 0.063 bitcoin ($490) if the ransom is paid within 72 hours after the attack.


Distribution Techniques

This latest ransomware is usually distributed via spam e-mails with malicious attachments. Cyber-criminals send the e-mails with a catchy subject lines. Such header information is given to trick the user into believing that the e-mail is from a shipping company. These e-mails notify about an undelivered package or a shipment that have been made. One cannot resist being curious on such e-mails. As soon as you open the attachment in the e-mail, the Poret ransomware will infiltrate your system.

Apart from e-mails, it also exploits the vulnerabilities in the Operating System. It has been observed that, Poret attacks the victims by hacking Remote Desktop Services (RDP) ports.

However, if you want to recover your encrypted data, you should try the following steps. Here are all the possible ways you can try to stop Poret ransomware:

Removal Guide for Poret ransomware

STEP A: Reboot your system to Safe Mode with Networking

Windows 7/ Vista/ XP

  1. Click on Windows icon present in the lower left corner of the computer screen.
  2. Select and click  Restart.
  3. When the screen goes blank, Keep tapping  F8  Key until you see the Advanced Boot Options window.
  4. With the help of arrow keys on keyboard, Select Safe Mode with Networking  option from the list and press the Enter Key. The system will then restart to Safe Mode with Networking.

5 Click on the username and enter the password (if any).

Windows 10 / Windows 8

  1. Press and hold the Shift Key and simultaneously click on the windows icon present in the lower left corner of your computer screen.
  2. While the Shift key is still pressed click on the Power button and then click on Restart.
  3. Now select Troubleshoot → Advanced options → Startup Settings.
  4. When the Startup Settings screen appears which is the first screen to appear after restart, select and click on Enable Safe Mode with Networking. The system will then restart to Safe Mode with Networking.
  5. Click on the username and enter the password.

If this step didn’t work, and the suspicious file remains in your system, you can try the next step.

STEP B: How to delete suspicious file in system Configuration settings

  1. Type “Msconfig” in search box / Run Box, select it and press Enter.
  2. Click on “Services” Tab and click on “Hide all Microsoft services”.
  3. Select the service showing a connection to Poret Ransomware.

Windows 7

  1. Click on the next tab – “Startup”.
  2. Find any blank or suspicious entry or the entry with Poret Ransomware mentioned and remove the check mark.
  3. Click on Apply button and then click on OK.

Windows 10

  1. Click on the next tab – “Startup”.
  2. Take the mouse cursor to ‘Open task Manager‘ link and click on it.  This opens the Task Manager window.
  3. Find any blank or suspicious entry or the entry with Poret Ransomware mentioned and click on it.
  4. Then click on Disable button.

If you are unable to remove the ransomware in configuration settings, you can try removing the malicious file using command prompt.

STEP C:  Delete suspicious file using Command Prompt

Once the system starts, ensure to use an account with administrative privilege to access Safe Mode with Command Prompt.

After the user enters admin credentials, Command prompt window is displayed wherein you are entitled to enter the below commands:

  1. Sc Delete Command Prompt. This service should be the one corresponding with Poret Ransomware
  2. Type “exit” to exit the command prompt and restart the system in safe mode with command prompt.

If command prompt also fails, the final step is restoring your system files and folders.

STEP D: Restore system Files and Folders

Method 1 using Control Panel

  1. Click on the ‘Start’ button on the taskbar. This will open the Start menu.
  2. Click on the ‘Control Panel’ button in the Start menu. This will open the control panel window.
  3. In the Control Panel window, click on the ‘View by:’ button on the top right. Select the Large Icon option
  4. In the control Panel window click on the ‘Recovery Icon’. This will open a window that will ask ‘Restore the computer to an earlier point in time’.
  5. Click on the ‘Open system restore’ button. This will open the ‘system restore ’window where you need to click on the Next Button.
  6.  Select the restore point that is prior the infiltration of Poret Ransomware. After doing that, click Next.
  7. This will open the ‘Confirm your restore point’ dialog box. Click on Finish button. This will restore your system to a previous restore point before your system was infected by Poret Ransomware.


Method 2 using Command Prompt

  1. Type cmd in the search box and click on the command prompt to open the Command Prompt window. box and clicking on it.
  2. Once the Command Prompt window shows up, enter cd restore and click Enter.(Ensure that you in the system32 directory of Windows folder in C Drive)
  3. Now type rstrui and press Enter again.
  4. When a new window shows up, click Next and select your restore point that is prior the infiltration of Poret Ransomware. After doing that, click Next.
  5. This will open the ‘Confirm your restore point’ dialog box. Click on Finish button. This will restore your system to a previous restore point before your system was infected by Poret Ransomware.



Method 3 : Directly type 'rstrui' in the search box

  1. Type ‘Rstrui’ in the search box present on the task bar. This will open the System restore dialog box.

Continue to follow steps 4 & 5 of Method 2 to restore the System Files and settings.

Tips to prevent your system from Poret ransomware

  1. Keeping the Operating System Updated- In order to remain protected and avoid such infections, it is recommended to keep your Operating System updated by enabling the automatic update on your system. The systems with outdated or older versions of Operating System become an easy target for the attackers.
  2. Resist clicking on spam emails – One of the major techniques used for malware distribution is forwarding spam emails to the user. The system gets infected as soon as the user clicks on the attachment. These mails appear to be genuine, so be aware and resist falling for these tricks.
  3. Keep an eye on third party installations- It is quite important that you take due care while installing any third party applications for they are major source of such infections. Such malware programs come bundled with the free applications thereby requiring the user to remain cautious.
  4. Regular periodical backup- In order to keep your data and files safe, it is recommended to take regular back up of all your data and files either on an external drive or cloud.
  5. Use Anti-Virus Protection- We strongly recommend the use of antivirus protection/internet security in your PC like Vipre and Hitman so that it remains safe.
  6. Enable the Ad Blocker/Popup Blocker in your browser- Enabling the popup blocker/ ad blocker in your chosen browser will help you to stay protected from annoying adware.

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