Full Report
2025-02-23 • Github (albertzsigovits) • Albert Zsigovits • win.toxiceye Open article on Malpedia
Analysis Summary
The provided context describes an article or resource related to analyzing the **ToxicEye RAT**, specifically focusing on **configuration extraction** and **YARA signatures**.
Since the original article content itself is not provided, the summary will be structured based on the known characteristics of the ToxicEye RAT, extrapolating potential details an analyst would look for in such a resource.
# Tool/Technique: ToxicEye RAT
## Overview
ToxicEye RAT (Remote Access Trojan) is a relatively simple, open-source remote administration tool often utilized by low-tier actors or for initial exposure during broader campaigns. Its purpose is to provide remote control over compromised Windows systems.
## Technical Details
- Type: Malware Family (RAT)
- Platform: Windows
- Capabilities: Remote command execution, file management, keystroke logging, webcam/microphone access, potentially ransomware deployment (depending on configuration).
- First Seen: Initial public awareness was around 2018, though configurations/variants evolve. The specific mention of a 2025 date in the context header likely refers to a proposed update or analysis date, not the initial appearance of the malware itself.
## MITRE ATT&CK Mapping
As a versatile RAT, ToxicEye commonly maps to several core areas:
- **TA0011 - Command and Control**
- T1071 - Application Layer Protocol
- T1573 - Encrypted Channel
- **TA0005 - Defense Evasion**
- T1027 - Obfuscated Files or Information
- **TA0002 - Execution**
- T1059 - Command and Scripting Interpreter
## Functionality
### Core Capabilities
- Establishing a persistent connection to the command and control (C2) server.
- Executing arbitrary system commands received from the operator.
- Listing, downloading, and uploading files.
- Keylogging for credential harvesting.
### Advanced Features
- Depending on its compilation language (often written in Visual Basic .NET or C#), it may utilize specific obfuscation techniques.
- Configuration files often dictate C2 addresses, ports, and specific victim identifiers.
## Indicators of Compromise (Inferred/Typical)
*Note: Specific IOCs from the analysis are missing, so typical examples are listed.*
- File Hashes: [Specific hashes would be derived from the analyzed configuration extraction results.]
- File Names: [Varies widely, often utilizing benign-sounding names related to system processes.]
- Registry Keys: Persistence mechanisms often involve `HKCU\Software\Microsoft\Windows\CurrentVersion\Run`.
- Network Indicators: Communication typically over standard ports (e.g., 80, 443, or custom TCP ports) usually directed towards non-reputable domains (e.g., using services like No-IP or custom infrastructure). (Defanged example: `192[.]168[.]1[.]100`)
- Behavioral Indicators: Execution of suspicious PowerShell/CMD commands; presence of newly created files with associated drop locations typical for .NET executables.
## Associated Threat Actors
ToxicEye is generally associated with **script kiddies, novice threat actors, or sometimes financially motivated groups** that leverage readily available open-source malware kits for opportunistic scanning and basic remote access.
## Detection Methods
- Signature-based detection: Specific hashes resulting from the configuration data extraction.
- Behavioral detection: Monitoring for unexpected outbound WAN connections initiated by processes running from user directories, especially those attempting to connect via non-standard HTTP/HTTPS ports.
- YARA rules: Rules specifically designed to match the unique bytecode or string patterns found within the ToxicEye configuration payload or the compiled binary structure.
## Mitigation Strategies
- Prevention measures: Strict application control policies (AppLocker/WDAC) to prevent execution from temp or user profile directories.
- Hardening recommendations: Regular patching, least privilege enforcement, and robust network egress filtering to block communication to known suspicious IPs or dynamic DNS services.
## Related Tools/Techniques
- Other common open-source RATs (e.g., njRAT, DarkComet).
- General Remote Access Tool deployment TTPs.