Full Report
2025-03-07 • MalwareAnalysisSpace • Seeker • elf.akira Open article on Malpedia
Analysis Summary
# Tool/Technique: Akira Ransomware (Linux Variant)
## Overview
Akira is a Ransomware-as-a-Service (RaaS) operation that has expanded its capabilities to target Linux environments, in addition to its previous Windows targets. The Linux variant is used to encrypt files on compromised systems, demanding a ransom for the decryption key.
## Technical Details
- Type: Malware family (Ransomware)
- Platform: Linux (Confirmed expansion), Windows (Implied heritage)
- Capabilities: File encryption, likely network discovery/lateral movement components typical of ransomware strains.
- First Seen: Information about the Linux variant is derived from the article dated 2025-03-07, though the Akira family itself predates this.
## MITRE ATT&CK Mapping
*Note: Specific ATT&CK mappings for the Linux variant are inferred based on standard ransomware behavior as the provided text does not list specific TIDs.*
- **TA0011 - Command and Control** (Inferred for C2 communication)
- T1105 - Ingress Tool Transfer
- **TA0040 - Impact**
- T1486 - Data Encrypted for Impact
## Functionality
### Core Capabilities
- Encrypting user data and system files on Linux systems.
- Extortion through demanding ransom payment for decryption.
### Advanced Features
- The expansion specifically targets Linux, suggesting capabilities tailored to Linux file systems and processes.
## Indicators of Compromise
- File Hashes: [Not provided in context]
- File Names: [Not provided in context]
- Registry Keys: [Not applicable to primary Linux execution]
- Network Indicators: [Not provided in context]
- Behavioral Indicators: [File modification/renaming post-encryption, ransom note creation]
## Associated Threat Actors
- [Threat actors utilizing the Akira RaaS operation]
## Detection Methods
- [Signature-based detection against known encrypted file extensions or ransom notes]
- [Behavioral detection focusing on mass file encryption activities]
- [YARA rules if available]
## Mitigation Strategies
- Regular, offline, and tested backups.
- Principle of Least Privilege enforcement on Linux systems.
- Network segmentation to limit lateral movement.
## Related Tools/Techniques
- Other Linux-targeting ransomware variants (e.g., LockBit Linux variant, BlackCat/ALPHV).