Why Secure Boot is Your Network’s Best Friend (And What BlackTech Taught Us)

By David Haslam, Head of Software Engineering

December 20, 2024

In the ever-evolving world of cybersecurity, some lessons are best learned from others’ mistakes. As reported in Dark Reading, the 2023 BlackTech cyberattacks, in which threat-actors replaced the firmware in Cisco routers their own malicious versions, serves as a stark reminder that attackers are getting smarter, and the stakes are higher than ever. Their tactics shine a spotlight on why technologies like secure boot are no longer optional in securing network infrastructure.

BlackTech, a group linked to state-sponsored espionage, infiltrated corporate networks by replacing router firmware with malicious versions. These modified firmware files provided a backdoor for attackers, enabling them to spy on network traffic, move laterally within the network, and hide their tracks for long periods.

One of their most alarming techniques involved bypassing standard security checks. By downgrading router firmware to older versions, they exploited devices that lacked mechanisms to verify the integrity of the software. As a result, the group created persistent, hard-to-detect backdoors on critical network devices.

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