Advanced Malware Threats Found Across Multiple Operating Systems
Cybersecurity experts have found two new malicious software threats: CHILLYHELL and ZynorRAT. CHILLYHELL targets macOS and is designed to secretly control infected devices. It can steal data, crack passwords, and run hidden commands. It connects to a remote server and stays hidden using multiple tricks. This malware was notarized by Apple in 2021, which made it harder to detect, but its certificate has now been revoked. It's believed to be linked to a hacking group active since 2022.
ZynorRAT targets Windows and Linux systems and is controlled through a Telegram bot. It can steal files, take screenshots, run commands, and stay active on the device. It first appeared in July 2025 and may still be under development. It spreads through file-sharing sites and may have been tested by its own creator, possibly a lone hacker.
Simple Safety Tips:
- Avoid downloading unknown files from file-sharing or suspicious websites.
- Avoid opening links or attachments from emails, messages, or chats unless you're sure they're safe.
- Keep your system and apps updated to patch known weaknesses.
- Use a reliable antivirus or security suite that can detect unusual activity, including fileless malware.
- Monitor system behavior, like sudden slowdowns or unknown processes, which may indicate infection.
- Be cautious—even trusted-looking apps can be harmful.
Source: https://thehackernews.com/2025/09/chillyhell-macos-backdoor-and-zynorrat.html