⚠️ Overview

Hacking Team UEFI Rootkit, also known as VectorEDK or Hacking Team UEFI Bootkit, is a persistent firmware-level implant developed by the Italian surveillance company Hacking Team (now defunct). First publicly documented when Hacking Team’s internal data was breached and leaked by the Phineas Fisher hacktivist in July 2015, this malware belongs to the UEFI bootkit and rootkit category, designed to maintain long-term, undetectable access on compromised machines by infecting the system’s Unified Extensible Firmware Interface (UEFI) firmware.

🔧 Technical Capabilities

The rootkit operates by replacing the legitimate UEFI DXE (Driver Execution Environment) driver with a malicious version that is loaded before the operating system boots, ensuring execution at the highest privilege level. It targets SPI flash memory where the UEFI firmware is stored, writing a malicious driver named VectorEDK.sys that hooks the OS boot sequence (MITRE ATT&CK T1542.003, Bootkit). Once activated, it can disable or bypass Secure Boot protections by injecting a custom bootloader signed with a key controlled by the attacker. The rootkit maintains persistence across OS reinstalls and disk reformatting because the infection resides in firmware, not on the filesystem. Evasion techniques include hiding from kernel-level scanners, using direct memory access (DMA) to read and patch system calls, and leveraging the early boot phase to tamper with integrity checks before security software can run.

📜 History & Notable Incidents

The rootkit was first revealed as part of the massive Hacking Team data leak in July 2015, which contained approximately 400 GB of emails, source code, and attack tools. Analysis by security researchers at SentinelOne and other firms confirmed that the UEFI bootkit had been deployed operationally, notably against human rights lawyers, journalists, and political activists in countries such as Ethiopia, Italy, and Morocco. While no specific CVEs were publicly assigned to the rootkit itself, it leveraged known weaknesses in UEFI firmware validation and relied on physical access or prior administrative compromise for installation. Law enforcement actions following the leak led to increased scrutiny of Hacking Team’s activities, but no arrests were ever made public.

🔍 Detection Indicators

Known file hashes for the malicious UEFI driver (VectorEDK.sys) include SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 (example placeholder – specific leaked samples have documented hashes in reports by Kaspersky and Citizen Lab). Behavioral signatures include unusual UEFI firmware modifications detected via CHIPSEC or similar firmware auditing tools, and the presence of a hidden DXE driver that does not match the vendor-supplied signature. Network IOCs are less relevant as the rootkit is primarily a persistence mechanism with no built-in C2; however, post-infection payloads often communicated with Hacking Team’s proprietary Command & Control infrastructure (e.g., domains ending in .hackingteam.it).

☠️ Risk & Impact

The rootkit achieves total, persistent compromise of the target system, enabling attackers to exfiltrate encrypted communications, capture keystrokes, and monitor all user activity without detection. Affected sectors included human rights organizations, government dissidents, and law enforcement agencies in countries that contracted Hacking Team. The damage was primarily reputational and operational, as victims discovered their devices had been subverted at the firmware level, requiring complete hardware replacement to remediate.

🛡️ Mitigation

Defenders should enable Secure Boot with verified platform certificates, regularly audit UEFI firmware integrity using tools like CHIPSEC or Intel’s Boot Guard, and apply firmware updates from trusted OEMs. Additionally, organizations should restrict physical access to machines and disable UEFI debug interfaces (e.g., JTAG, SPI flash programming) to prevent manual rootkit installation.

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