The Evolution of Akira Ransomware

Written by The Hivemind | Nov 1, 2024 4:21:19 PM

Verticals Targeted: Aerospace, Manufacturing, Professional Services, Scientific and Technical Services, Retail, Construction, Insurance, Telecommunications, Hospitality, and Legal Services

Executive Summary

Akira ransomware is one of the most prolific ransomware families of 2024. Active in the wild since April 2023, Akira has continued to evolve, maintaining its relevance on the threat landscape.

Key Takeaways

Active since 2023, Akira ransomware is one of the most prolific ransomware families of 2024.
In 2024, Akira has exhibited an evolution that includes a new encryptor, exploiting new CVEs for initial access, and a shift in extortion tactics.
Verticals targeted by Akira in recent months include aerospace, manufacturing, professional services, scientific and technical services, retail, construction, insurance, telecommunications, hospitality, and legal services.
Due to its change in TTPs, adaptability, and its continued relevance on the threat landscape, PolySwarm analysts consider Akira to be an evolving threat.

What is Akira?

Akira ransomware is one of the most prolific ransomware families of 2024. Active in the wild since April 2023, Akira has continued to evolve, maintaining its relevance on the threat landscape. Earlier this year, Akira released an updated version of its encryptor. More recently, Akira released yet another updated ransomware encryptor, which is capable of targeting both Windows and Linux systems. Cisco Talos recently reported on this activity.

2024 has seen the evolution of Akira, with new TTPs and exploits being used to keep it relevant on the threat landscape. Akira was originally written in C++, but this year, a new Rust-based variant of its ESXi encryptor was released. The developers appear to be experimenting with new programming techniques and iteratively building the payload’s functions. This variant was followed by yet another retooling, reverting back to C++ based ransomware.

The threat actors behind Akira are known to exploit common infection vectors to obtain initial access to the victim network. This has often included using compromised VPN credentials. More recently, the threat actors have been observed targeting network appliances that are vulnerable to CVE-2024-40766, which is an exploit facilitating remote code execution (RCE) on certain SonicWall SonicOS devices. The threat actors have also been observed exploiting CVE-2020-3259, CVE-2023-20263, and CVE-2023-48788. Once the threat actors have established a foothold in the victim network, they use PowerShell scripts for credential harvesting and privilege escalation. They also delete system shadow copies to hinter data recovery. They use RDP connections for lateral movement and use a variety of techniques to evade detection.

Akira’s extortion-focused TTPs have also evolved. Historically, the threat actors behind Akira used a double extortion model, demanding a ransom payment to decrypt files and leveraging the threat of public release of stolen data to coerce payment. Earlier this year, Akira began to discard the encryption tactics, focusing primarily on data exfiltration, likely while its encryptor was being reworked. Following the release of the new encryptor, the threat actors again began to use double extortion tactics.

Akira was observed targeting a Latin American aerospace entity in June 2024. Other verticals targeted by Akira in recent months include manufacturing, professional services, scientific and technical services, retail, construction, insurance, telecommunications, hospitality, and legal services. Due to its change in TTPs, adaptability, and its continued relevance on the threat landscape, PolySwarm analysts consider Akira to be an evolving threat.

IOCs

PolySwarm has multiple samples of Akira.

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