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Microsoft has announced a new free-to-use initiative aimed at uncovering forensic evidence of sabotage on Linux systems, including rootkits and intrusive malware that may otherwise go undetected.

OS X 10.11 (El Capitan) or higher. Windows 7 with Service Pack 1 or higher. Chrome OS with Google Play access. Mobile users will need: Android 4.4 (KitKat) or higher. IOS 11 or higher. For the older version of Malwarebytes (version 3.9.32), you’ll need to have: OS X 10.10 (Yosemite) or higher. Windows XP (32-bit) with Service Pack 3 or higher.

The cloud offering, dubbed Project Freta, is a snapshot-based memory forensic mechanism that aims to provide automated full-system volatile memory inspection of virtual machine (VM) snapshots, with capabilities to spot malicious software, kernel rootkits, and other stealthy malware techniques such as process hiding.

The project is named after Warsaw’s Freta Street, the birthplace of Marie Curie, the famous French physicist who brought X-ray medical imaging to the battlefield during World War I.

“Modern malware is complex, sophisticated, and designed with non-discoverability as a core tenet,” said Mike Walker, Microsoft’s senior director of New Security Ventures. “Project Freta intends to automate and democratize VM forensics to a point where every user and every enterprise can sweep volatile memory for unknown malware with the push of a button — no setup required.”

The objective is to infer the presence of malware from memory, at the same time gain the upper hand in the fight against threat actors who deploy and reuse stealthy malware on target systems for ulterior motives, and more importantly, render evasion infeasible and increase the development cost of undiscoverable cloud malware.

To that effect, the “trusted sensing system” works by tackling four different aspects that would make systems immune to such attacks in the first place by preventing any program from: Linux or macos for programming download.

• Detecting the presence of a security sensor prior to installing itself
• Residing in an area that’s out of view of the sensor
• Detecting the sensor’s operation and accordingly erasing or modifying itself to escape detection, and
• Tampering with the sensor’s functions to cause sabotage

“When attackers and defenders share a microarchitecture, every detection move a defender makes disturbs the environment in a way that is eventually discoverable by an attacker invested in secrecy,” Walker noted. “The only way to discover such attackers is to remove their insight into defense.”

Open to anyone with a Microsoft Account (MSA) or Azure Active Directory (AAD) account, Project Freta lets users submit memory images (.vmrs, .lime, .core, or .raw files) via an online portal or an API, post which a detailed report is generated that delves into different sections (kernel modules, in-memory files, potential rootkits, processes, and more) that can be exported via JSON format.

Microsoft said it focused on Linux due to the need for fingerprinting operating systems in the cloud in a platform-agnostic manner from a scrambled memory image. The increased complexity is given the large number of publicly available kernels for Linux. This initial release version of Project Freta supports over 4,000 Linux kernels, with Windows support in the pipeline.

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It’s also in the process of adding a sensor capability that allows users to migrate the volatile memory of live VMs to an offline environment for further analysis and more AI-based decision-making tools for threat detection.

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“The goal of this democratization effort is to increase the development cost of undiscoverable cloud malware toward its theoretical maximum,” Walker said. “Producers of stealthy malware would then be locked into an expensive cycle of complete re-invention, rendering such a cloud an unsuitable place for cyberattacks.”

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The online analysis portal can be accessed here. The full documentation for Project Freta is available here.