Inside Akira Ransomware’s Rust Experiment

Category	Details
Threat Actors	Akira ransomware group, affiliates operating ransomware-as-a-service (RaaS) targeting ESXi servers.
Campaign Overview	Early 2024 campaign experimenting with Akira v2, a Rust-based ransomware targeting ESXi servers. Analyzed for its control flow, design choices, and unique characteristics.
Target Regions/Victims	Organizations using ESXi bare-metal hypervisor servers, Linux environments targeted as a secondary feature.
Methodology	Multithreaded design using Rust, command-line interface for operator control, in-depth use of Rust libraries like indicatif and seahorse for functionality and visual feedback.
Product Targeted	ESXi servers, Linux systems (with /vmfs/volumes as the default directory for targeting), general-purpose file encryption capabilities.
Malware Reference	Akira ransomware v2, SOSEMANUK stream cipher, curve25519 cryptographic library for asymmetric encryption.
Tools Used	Rust language features and libraries (indicatif, seahorse), compiled in Release mode, leveraging third-party crates for cryptography and control flow.
Vulnerabilities Exploited	Not directly exploiting vulnerabilities but instead focusing on file encryption and VM targeting using built-in tools like vim-cmd for ESXi VMs.
TTPs	Hybrid encryption with asymmetric and symmetric ciphers, use of Rust’s multithreading and CLI capabilities, in-depth analysis evasion through aggressive inlining of library functions.
Attribution	Akira ransomware group and affiliates utilizing Rust for a cross-platform and efficient ransomware deployment.
Recommendations	- Update and secure ESXi environments. - Monitor for suspicious processes and CLI usage. - Employ strong encryption for backups. - Implement proactive defenses against RaaS attacks.
Source	Check Point Research analysis of Akira ransomware, 2024.

Disclaimer: The above summary has been generated by an AI language model.