How To Stop and Safely Remove Pomoch Ransomware

Pomoch ransomware, a newly identified variant of the MedusaLocker ransomware family, represents a significant threat to businesses worldwide. This malicious software encrypts files on the infected system, rendering them inaccessible without the decryption key. The ransomware appends a ".pomoch45" extension to the filenames, making it easy to spot the compromised files. For instance, a file named "example.jpg" would become "example.jpg.pomoch45" after encryption.

Once the encryption process is complete, a ransom note titled "How_to_back_files.html" is created. This note is specifically tailored to target companies rather than individual users, employing a tactic known as double extortion.

The Ransom Note and Extortion Tactics

The ransom note delivered by Pomoch ransomware informs the victim that their network has been breached, and files have been encrypted using a combination of RSA and AES cryptographic algorithms. The note further reveals that sensitive and confidential data has been exfiltrated from the network, adding another layer of pressure on the victim. The attackers demand a ransom in exchange for the decryption key and threaten to leak the stolen data if their demands are not met.

Victims are given a 72-hour window to contact the attackers. If they fail to do so, the ransom amount is set to increase. The attackers offer a small concession by allowing the victim to decrypt up to three non-essential files as proof of their ability to restore the data. However, paying the ransom is risky, as victims often do not receive the promised decryption tools, even after making the payment.

The Reality of Ransomware Attacks

Our extensive experience with ransomware has shown that decryption is rarely possible without the attackers' assistance unless the ransomware is poorly designed. Even in cases where the ransom is paid, there's no guarantee that the attackers will provide the necessary decryption keys. Furthermore, paying the ransom only fuels the criminal enterprise behind these attacks, encouraging them to continue targeting more victims.

Removing Pomoch ransomware from the system will stop further encryption but will not recover the already encrypted files. The best course of action is to restore data from a backup that was made prior to the infection and stored in a secure, separate location.

Preventing Ransomware Infections

To protect yourself from ransomware like Pomoch, it’s crucial to adopt strong cybersecurity practices. Here are some key recommendations:

1. Download Only from Trusted Sources: Ensure that you only download software and files from official and verified sources. Third-party downloads often contain hidden malware.
2. Exercise Caution with Emails: Be wary of unsolicited emails, especially those containing attachments or links. Phishing is a common method used to spread ransomware.
3. Use Reliable Security Software: Install a reputable anti-virus program and keep it updated. Regularly scan your system for threats and remove any detected issues promptly.
4. Maintain Regular Backups: Regularly back up your data to multiple locations, including remote servers and offline storage devices. This practice ensures that you can recover your files even if they are encrypted by ransomware.

Pomoch ransomware is a dangerous and sophisticated threat that underscores the importance of robust cybersecurity measures. By staying vigilant and following best practices, you can significantly reduce the risk of falling victim to such attacks. If your system has already been infected, it’s essential to remove the ransomware immediately and consult with cybersecurity professionals to mitigate further damage.