In-memory Malware

Malware that resides in system memory to evade traditional detection methods.

Understanding In-Memory Malware

It is a type of malware that operates entirely in system memory (RAM) without writing to disk, making it stealthy and difficult to detect. This technique is commonly used in fileless attacks, advanced persistent threats (APTs), and banking Trojans.

Common Applications and Use Cases

Fileless Attacks – Using PowerShell, WMI, or JavaScript to execute payloads in memory.
Credential Theft – Harvesting credentials from LSASS memory dumps using tools like Mimikatz.
Code Injection Techniques – Injecting malicious code into legitimate system processes (svchost.exe, explorer.exe).
APT Operations – Nation-state actors use in-memory malware to evade endpoint security.
Ransomware Deployment – Some ransomware strains execute in RAM-only mode to bypass detection.

Best Practices and Security Considerations

Enable Advanced Threat Protection (ATP) – Use EDR/XDR solutions to detect memory-based attacks.
Monitor PowerShell and Scripting Activity – Restrict unauthorized PowerShell execution.
Use Memory Forensics Tools – Analyze memory dumps with Volatility, Rekall, and CrowdStrike Falcon.
Disable Macros and Untrusted Scripts – Prevent execution of malicious VBA macros and scripts.

Implement Least Privilege Access (LPA) – Restrict administrative privileges to prevent malware execution.