Full Report
2025-01-30 • RevEng.AI • RevEng.AI • win.lumma Open article on Malpedia
Analysis Summary
The provided context does not contain sufficient technical details to fully populate the required summary template for specific tools, malware, or techniques, as it primarily serves as a link to an external article mentioning "One ClickFix" and "LummaStealer." However, it explicitly links to the Malpedia entry for **LummaStealer**. I will generate the summary based on the inferred information about LummaStealer from the provided link reference and structure.
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# Tool/Technique: LummaStealer
## Overview
LummaStealer is an information-stealing malware designed to harvest sensitive data from compromised Windows systems. The associated article suggests recent activity involving evasion tactics, possibly related to reCAPTCHA challenges.
## Technical Details
- Type: Malware family
- Platform: Windows
- Capabilities: Information theft (stealing credentials, browser data, cryptocurrency wallets), potential use of obfuscation/anti-analysis techniques.
- First Seen: Information not specified in the context (but generally known to be active from late 2023/early 2024).
## MITRE ATT&CK Mapping
*(Note: Specific mappings are based on general knowledge of LummaStealer, as the article content is unavailable.)*
- T1555 - Credentials from Password Stores
- T1555.003 - Credentials from Web Browsers
- T1056 - Input Capture
- T1056.001 - Keylogging
- T1003 - OS Credential Dumping
- T1003.001 - LSASS Memory
## Functionality
### Core Capabilities
- Stealing sensitive files, browsing history, cookies, and saved credentials from numerous web browsers (Chrome, Edge, Firefox, etc.).
- Targeting cryptocurrency wallets and associated files (e.g., Electrum, Exodus).
- Exfiltrating system information.
### Advanced Features
- Capabilities often include basic obfuscation or encryption of stolen data prior to exfiltration.
- Potential use of anti-analysis checks to avoid execution in sandboxes or virtual environments.
## Indicators of Compromise
- File Hashes: [Not available in context]
- File Names: [Not available in context, but typically uses randomized or legitimate-sounding names]
- Registry Keys: [Not available in context]
- Network Indicators: [Exfiltration over HTTP/HTTPS to C2 infrastructure. Specific domains/IPs not available in context.]
- Behavioral Indicators: Accessing browser profile directories (`AppData\Local`, `AppData\Roaming`), attempting to read credential stores.
## Associated Threat Actors
- Various financially motivated threat actors and initial access brokers often leverage LummaStealer due to its accessible nature (often distributed via malspam or software cracks).
## Detection Methods
- Signature-based detection: Matching known file hashes or strings within the malware payload.
- Behavioral detection: Monitoring attempts to access protected browser data paths or unusual outbound connections carrying large data payloads.
- YARA rules: Rules targeting known strings or structure within the payload.
## Mitigation Strategies
- Implement robust endpoint detection and response (EDR) solutions.
- Educate users on phishing and social engineering tactics used to deliver stealer malware.
- Employ host-based firewalls to restrict outbound communication to known C2 infrastructure.
- Regularly check for unusual process injection or API hooking associated with known stealer execution patterns.
## Related Tools/Techniques
- Vidar Stealer
- RedLine Stealer
- StealC
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*The context also mentioned **One ClickFix** and **Brute Ratel C4 (BRc4)** in related links, a complete summary for those requires analyzing the linked articles.*