Full Report
2024-12-06 • OALabs • Sergei Frankoff • win.cryptbot Open article on Malpedia
Analysis Summary
# Tool/Technique: CryptBot
## Overview
CryptBot is an evolving information stealer malware, tracked by OALabs, with multiple iterations being observed over time. This summary synthesizes information based on its tracking and evolution.
## Technical Details
- Type: Malware family (Stealer)
- Platform: Likely Windows (based on associated analysis details for similar loaders/stealers)
- Capabilities: Information theft, credential harvesting, cryptocurrency stealing.
- First Seen: Not explicitly stated in the provided context, but its evolution is being tracked up to at least late 2024.
## MITRE ATT&CK Mapping
*(Note: Specific ATT&CK mappings require deeper analysis of the CryptBot variant's execution, but typical stealer activities correlate to the following):*
- **TA0001 - Initial Access**
- T1566 - Phishing
- **TA0005 - Defense Evasion**
- T1027 - Obfuscated Files or Information
- **TA0009 - Collection**
- T1555 - Credentials from Password Stores
- T1552 - Unsecured Credentials
- **TA0011 - Exfiltration**
- T1041 - Exfiltration Over C2 Channel
## Functionality
### Core Capabilities
- Stealing sensitive information such as saved credentials, browser data, and cryptocurrency wallets.
- Gathering system details from the infected host.
### Advanced Features
- Evolution and iteration suggest adaptation to bypass security measures and potentially employ fileless or advanced encryption techniques for communication or data storage (similar to context mentioned for Latrodectus).
## Indicators of Compromise
Specific IoCs for the latest CryptBot variant are not provided in the context snippet. Generally, IoCs for stealer malware like CryptBot include:
- File Hashes: [Varies by iteration]
- File Names: [Varies by iteration]
- Registry Keys: [Used for persistence, varies]
- Network Indicators: [C2 communication using encrypted channels, varies]
- Behavioral Indicators: Attempts to access browser databases (SQLite files), crypto wallet files, and sensitive system directories.
## Associated Threat Actors
Threat actors utilizing information stealers for financial gain. Specific attribution is not provided in this context, but its evolution suggests ongoing use by financially motivated groups.
## Detection Methods
Detection relies heavily on monitoring for file access related to credential stores and outbound communication patterns associated with known attacker infrastructure.
## Mitigation Strategies
- **Prevention:** Email filtering, robust endpoint security solutions, application control to restrict execution of unknown binaries.
- **Hardening:** Using multi-factor authentication (MFA) everywhere, avoiding saving passwords in the browser, and regularly patching operating systems and applications.
## Related Tools/Techniques
- **DanaBot:** Mentioned in relation to Delphi binary analysis, suggesting connectivity via loaders or similar initial access methods.
- **Latrodectus:** A RAT whose analysis involves extracting AES encrypted strings, suggesting CryptBot variants might also employ sophisticated encryption for data handling.
- **SmartLoader:** A known loader often used to deploy stealers and other malware.