Full Report
2025-04-02 • Intel 471 • Intel 471 • elf.blackbasta, win.blackbasta Open article on Malpedia
Analysis Summary
The provided context is an entry description pointing to an article about Black Basta's TTPs but does not contain the actual technical content (malware samples, specific hashes, C2s, or detailed techniques) necessary to fully populate the summary template.
Therefore, the summary will be based on the known identity of Black Basta, its general characterization as known from industry reporting (as suggested by the source metadata), and the assumption that the linked article details its operations. Specific, extracted technical details like hashes or exact MITRE mappings cannot be provided without the full article text.
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# Tool/Technique: Black Basta Ransomware
## Overview
Black Basta is an active Ransomware-as-a-Service (RaaS) operation that emerged around April 2022. It is known for employing a "double extortion" model, stealing data before encrypting systems. Threat actors affiliated with Black Basta typically gain access via compromised legitimate remote access solutions or through purchasing initial access from initial access brokers.
## Technical Details
- Type: Malware family (Ransomware)
- Platform: Windows (implied by context linking to `win.blackbasta`) and potentially Linux/VMware (implied by ELF capability mentioned in the link `elf.blackbasta`)
- Capabilities: Encryption of files, data exfiltration, double extortion tactics.
- First Seen: Approximately April 2022
## MITRE ATT&CK Mapping
*Note: Specific mappings require the full article content. These are general mappings for ransomware operations.*
- [TA0011 - Command and Control]
- [TA0012 - Impact]
- [T1486 - Data Encrypted for Impact]
- [T1071 - Application Layer Protocol]
## Functionality
### Core Capabilities
- Encrypts files on targeted systems using strong cryptographic standards.
- Performs data exfiltration prior to encryption (double extortion).
- Utilizes custom tools or established techniques for lateral movement and privilege escalation post-initial compromise.
### Advanced Features
- Potential use of custom encryption binaries (`win.blackbasta`, sometimes referred to as Baka).
- Known to exploit vulnerabilities in legitimate tools (like CVE-2023-27350 for PaperCut) for initial access or privilege escalation.
- Operates a dedicated leak site (DLS) for negotiation and publicizing victims.
## Indicators of Compromise
*Note: Specific IoCs were not extracted from the provided description, only hyperlinks to potential malware variants.*
- File Hashes: [Not available in context]
- File Names: [Not available in context]
- Registry Keys: [Not available in context]
- Network Indicators: [Not available in context - All C2/domains must be defanged]
- Behavioral Indicators: [Rapid file renaming/modification, high CPU utilization during encryption]
## Associated Threat Actors
- Black Basta affiliates (Varies, often leveraging initial access brokers).
## Detection Methods
- Signature-based detection: Signatures for the main ransomware executable.
- Behavioral detection: Monitoring for mass file encryption activity, suspicious use of cryptographic APIs, and remote service creation.
- YARA rules: [Not available in context]
## Mitigation Strategies
- Robust backup and recovery strategy (offline/immutable backups).
- Strict segmentation to limit lateral movement capability of the deployed ransomware.
- Continuous patching of internet-facing systems and remote access tools.
- Multi-Factor Authentication (MFA) enforcement universally.
## Related Tools/Techniques
- Previous RaaS operations (e.g., LockBit, Conti, as Black Basta is seen as a successor/competitor).