The HoneyMyte APT evolves with a kernel-mode rootkit and a ToneShell backdoor

Securelist

December 29, 2025 at 10:00 AM

Actively Exploited

Overview

Kaspersky has reported on a new campaign from the HoneyMyte APT group, also known as Mustang Panda or Bronze President, which has evolved to use a sophisticated kernel-mode rootkit. This rootkit is designed to deploy and secure a backdoor known as ToneShell, which allows attackers to maintain persistent access to compromised systems. The implications of this development are significant, as it enhances the group’s ability to infiltrate networks and evade detection. Organizations need to be vigilant against these advanced tactics to protect sensitive data and maintain system integrity. This campaign highlights the ongoing threats posed by state-sponsored hacking groups and the need for robust cybersecurity measures.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: Kernel-mode rootkit, ToneShell backdoor, potentially various operating systems affected by the rootkit.
Action Required: Organizations should implement advanced endpoint detection and response solutions, regularly update their systems, and conduct thorough security audits to detect and mitigate such threats.
Timeline: Disclosed on 2025

Original Article Summary

Kaspersky discloses a 2025 HoneyMyte (aka Mustang Panda or Bronze President) APT campaign, which uses a kernel-mode rootkit to deliver and protect a ToneShell backdoor.

Impact

Kernel-mode rootkit, ToneShell backdoor, potentially various operating systems affected by the rootkit.

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Disclosed on 2025

Remediation

Organizations should implement advanced endpoint detection and response solutions, regularly update their systems, and conduct thorough security audits to detect and mitigate such threats.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to APT, Kaspersky.

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