Researchers Bypass Elastic EDR Call-Stack Signatures Using Call Gadgets

Security researchers have developed a new technique that leverages call gadgets to insert arbitrary modules into the call stack during module loading, successfully bypassing Elastic EDR’s signature-based detection rules.

Openness in Elastic EDR Detection Logic

Elastic’s policy of transparency making its detection logic and payload testing tools publicly available has enabled the security community to understand better and challenge its EDR mechanisms.

Unlike many vendors, Elastic allows open access to its detection rules, enabling researchers to simulate and analyze real-world evasion techniques.

Elastic EDR’s detection engine focuses heavily on analyzing call stacks for signs of malicious activity.

Suspicious module loads, such as those initiated from unbacked (i.e., in-memory, not from disk) memory regions, are closely monitored, as these behaviors are strongly associated with attacks like shellcode injection.

Specific rules, such as those that track network modules loaded from unbacked memory, help identify standard techniques used by ...