Removing WannaCry/DoublePulsar: A Step-by-Step Guide
In the wake of the WannaCry ransomware attack in 2017, which exploited a vulnerability known as EternalBlue, it's crucial to understand how to remove its remnants, including the DoublePulsar backdoor. This guide will walk you through the process, ensuring your system is secure and free from these malicious components.
Understanding WannaCry and DoublePulsar
WannaCry is a ransomware worm that encrypts a victim's files and demands payment in Bitcoin in exchange for the decryption key. DoublePulsar, on the other hand, is a backdoor that allows attackers to remotely execute code on infected systems. It was used by the WannaCry attackers to spread the ransomware.
Before You Begin
Before starting the removal process, ensure you have a reliable antivirus software installed and up-to-date. Also, create a system restore point to safeguard your data in case something goes wrong during the process.

Manual Removal
While it's recommended to use professional antivirus software for removal, you can attempt manual removal if you're tech-savvy. Here's how:
- Open Command Prompt as an administrator.
- Type the following command and press Enter to check if your system is infected with DoublePulsar:
netstat -ano | findstr :4444
- If the command returns a process ID (PID), note it down.
- Kill the process using the following command, replacing <PID> with the actual PID:
taskkill /PID <PID> /F
- Delete the associated files. They are usually located in the following directories:
- C:\Windows\System32\Tasks\
- C:\Windows\System32\Tasks\Microsoft\Windows\
Using Professional Antivirus Software
Using professional antivirus software is the recommended method for removing WannaCry and DoublePulsar. Here's how to do it using some popular options:
| Antivirus Software | Removal Steps |
|---|---|
| Malwarebytes |
|
| Kaspersky |
|
Preventing Future Infections
To prevent future infections, ensure your system is always up-to-date with the latest security patches. Also, use a reliable antivirus software, avoid downloading files from untrusted sources, and be cautious of phishing emails.

In conclusion, removing WannaCry and DoublePulsar involves a systematic approach, whether you choose to do it manually or use professional antivirus software. Always prioritize your system's security to protect your data and privacy.