Fileless Malware Detection with Sysdig Secure

Sysdig Secure has introduced advanced tools to detect and combat fileless malware, a sophisticated cyber threat that operates entirely in a computer's memory without leaving traces on the hard drive, making traditional antivirus solutions ineffective. Fileless malware exploits legitimate processes through features like memfd, a Linux kernel feature that allows the creation of in-memory file objects, which attackers can use to execute malicious code stealthily. Sysdig Secure's Managed 'Sysdig Runtime Threat Detection' Policy now includes a high-severity default detection rule called 'Fileless Malware Detected (memfd)' that allows for real-time detection of such threats without additional configuration. This new rule leverages a system-call architecture to monitor and analyze process interactions dynamically, effectively identifying fileless attacks by setting the proc.is_exe_from_memfd flag to true whenever a memory file descriptor is used, thus enhancing cybersecurity measures against such elusive threats.