A new threat intelligence report from CloudSEK has been published. Their research team has uncovered how the MuddyWater APT group—a known state-linked threat actor—has significantly evolved its attack tooling by deploying a new Rust-based implant, which we’ve named “RustyWater.”
The report details an ongoing spear-phishing campaign targeting government, diplomatic, telecom, financial, and maritime organisations across the Middle East. What makes this campaign noteworthy is the group’s move away from its traditional PowerShell and VBS-based tools to a more stealthy, modular, and resilient Rust implant that enables long-term persistence and low-noise espionage—making detection and response far more challenging for defenders.
They break down both the technical mechanics and the broader security implications in a way that highlights why this evolution matters, especially for organisations relying on conventional security controls.
You can read the full report here:
https://www.cloudsek.com/blog/reborn-in-rust-muddywater-evolves-tooling-with-rustywater-implant
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This entry was posted on January 9, 2026 at 8:43 am and is filed under Commentary with tags CloudSEK. You can follow any responses to this entry through the RSS 2.0 feed.
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CloudSEK Report Reveals MuddyWater’s Shift to Advanced Rust-Based Cyber Espionage
A new threat intelligence report from CloudSEK has been published. Their research team has uncovered how the MuddyWater APT group—a known state-linked threat actor—has significantly evolved its attack tooling by deploying a new Rust-based implant, which we’ve named “RustyWater.”
The report details an ongoing spear-phishing campaign targeting government, diplomatic, telecom, financial, and maritime organisations across the Middle East. What makes this campaign noteworthy is the group’s move away from its traditional PowerShell and VBS-based tools to a more stealthy, modular, and resilient Rust implant that enables long-term persistence and low-noise espionage—making detection and response far more challenging for defenders.
They break down both the technical mechanics and the broader security implications in a way that highlights why this evolution matters, especially for organisations relying on conventional security controls.
You can read the full report here:
https://www.cloudsek.com/blog/reborn-in-rust-muddywater-evolves-tooling-with-rustywater-implant
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This entry was posted on January 9, 2026 at 8:43 am and is filed under Commentary with tags CloudSEK. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.