Fileless malware mitigation

The blog post addresses how attackers exploit fileless malware techniques to bypass security measures, particularly in containerized environments with read-only root filesystems. It highlights the vulnerability of such systems by discussing a specific exploit targeting a Redis Docker image with a critical CVE-2022-0543 vulnerability, which allows attackers to execute shell commands via a Lua sandbox escape. The article describes how attackers use shared memory (/dev/shm) to execute malicious code in-memory without writing to disk, thus evading traditional file-based detection methods. It emphasizes the importance of using tools like Falco for detecting in-memory attacks by monitoring suspicious behaviors, such as executions from /dev/shm. The discussion concludes that while read-only filesystems provide some security, they are not foolproof against fileless malware, urging the need for timely patching and advanced detection mechanisms to mitigate such threats effectively.