Prey Ransomware

Protecting personal and corporate devices from malware is no longer optional, it's essential. Cybercriminals continually develop more advanced tools to compromise data, and ransomware remains one of the most destructive threats. One of the latest examples of this type of malware is Prey Ransomware, a malicious program identified as a variant of the notorious MedusaLocker family. This threat is specifically designed to encrypt files, extort victims for ransom, and potentially leak stolen data if demands are not met.

A Relentless Attack on Data

Once executed on a targeted system, Prey Ransomware begins encrypting files using a combination of RSA and AES cryptographic algorithms, which are nearly impossible to break without the attackers' decryption keys. The malware appends the '.prey35' extension to each encrypted file, transforming names such as'photo.png' into 'photo.png.prey35.'

Following the encryption process, the ransomware alters the desktop wallpaper and drops a ransom note titled 'HOW_TO_RECOVER_DATA.html.' The message informs the victim that their company's network has been compromised, files encrypted, and sensitive information exfiltrated. Victims are instructed to contact the attackers within 72 hours or face increased ransom demands and the public exposure of stolen data.

The Deceptive Promise of Decryption

The ransom note claims that victims can test decryption on up to three non-essential files before payment. However, such claims are meant to build false trust. Cybersecurity experts emphasize that paying the ransom does not guarantee file recovery, in many cases, the attackers never provide the promised decryption key or tool. Moreover, paying only fuels further criminal operations and encourages new attacks.

Decryption without the attacker's involvement is typically impossible unless the ransomware is poorly coded or already decrypted by researchers. For most victims, recovery relies solely on the availability of secure, pre-existing backups.

Distribution Methods and Infection Vectors

Like most ransomware, Prey is distributed through phishing, social engineering, and malicious downloads. The infection often begins when unsuspecting users open deceptive attachments or links. The files may come in numerous formats, including ZIP, RAR, PDF, EXE, or Microsoft Office documents containing malicious macros. Simply opening these files can initiate the infection chain.

The threat may also spread through:

• Trojans and loaders that install ransomware in the background.
• Drive-by downloads or malvertising campaigns.
• Spam emails containing infected attachments or links.
• Fake software updates or pirated software activators ('cracks').
• Peer-to-peer (P2P) networks and unreliable freeware sites.
• Network propagation, where ransomware moves laterally across connected systems or external storage devices.

Removing the Threat and Recovering Files

If Prey Ransomware infects a system, immediate action is required. The malware must be completely removed to prevent further encryption. While removal stops additional damage, it will not decrypt affected files. The safest recovery method is restoring data from clean, offline backups created before the infection occurred.

Victims should avoid interacting with the ransom note and instead seek assistance from reputable cybersecurity professionals or incident response teams. It is also important to report the incident to local cybercrime authorities.

Building a Strong Defense: Essential Security Practices

Preventing ransomware infections like Prey requires a combination of awareness, good digital hygiene, and technical safeguards. Users can significantly reduce risk by implementing the following security measures:

1. Proactive Protection Steps

• Keep operating systems, software, and antivirus tools up to date.
• Enable multi-factor authentication (MFA) wherever possible.
• Use a reliable security suite with real-time threat monitoring.
• Disable macros in Microsoft Office and block automatic downloads.
• Avoid opening unexpected attachments or clicking links from unknown senders.

2. Backup and Data Management Practices

• Maintain multiple data backups, one on a remote server (cloud) and another on a disconnected physical device (external hard drive, USB).
• Regularly verify backup integrity to ensure files are restorable.
• Isolate backup systems from the main network to prevent cross-infection.

Conclusion: Vigilance Is the Best Defense

The rise of Prey Ransomware highlights the continuous evolution of cyber threats and the need for constant vigilance. Paying the ransom only deepens the problem, while prevention and preparedness remain the most effective defense. By practicing strong cybersecurity habits, maintaining regular backups, and avoiding risky online behavior, users can greatly reduce the chances of falling victim to ransomware like Prey.