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Autonomous PowerShell Agent Cheatsheet

Autonomous PowerShell Agent Cheatsheet

Overview

An autonomous PowerShell agent is a new type of AI-powered malware that can operate independently, without the need for a human operator. It can learn from its environment, adapt its behavior, and make decisions on its own. This makes it a particularly dangerous and difficult threat to defend against.

Key Characteristics

  • Autonomy: Can operate independently, without the need for a human operator.
  • Self-Learning: Can learn from its environment and adapt its behavior over time.
  • Behavior Adaptation: Can change its tactics, techniques, and procedures (TTPs) to evade detection.
  • Real-Time Evasion: Can take steps to evade detection in real-time, such as by changing its code or by using encryption.

How it Works

An autonomous PowerShell agent typically works as follows:

  1. Initial Compromise: The agent is delivered to a target system through a variety of means, such as a phishing email, a malicious website, or a software vulnerability.
  2. Execution: Once on the target system, the agent is executed. It then begins to learn about its environment and to identify potential targets.
  3. Lateral Movement: The agent may attempt to move laterally to other systems on the network, in order to expand its reach and to gain access to more valuable data.
  4. Data Exfiltration: The agent may attempt to exfiltrate data from the target systems, such as sensitive documents, financial information, or intellectual property.
  5. Persistence: The agent may attempt to establish persistence on the target systems, so that it can continue to operate even if the system is rebooted.

Defense Strategies

Defending against autonomous PowerShell agents requires a multi-layered approach that includes the following:

  • PowerShell Logging and Monitoring: Enable PowerShell logging and monitor for suspicious activity, such as the use of obfuscated commands or the execution of scripts from unusual locations.
  • Application Whitelisting: Use application whitelisting to prevent unauthorized PowerShell scripts from being executed.
  • Endpoint Detection and Response (EDR): Use an EDR solution to detect and respond to malicious PowerShell activity.
  • Threat Intelligence: Use threat intelligence to stay up-to-date on the latest PowerShell-based threats.
  • User Education: Educate your users about the dangers of phishing and other social engineering attacks.

Additional Resources