Payload Buried in Nested ZIP Layers

Attackers bury payloads inside multiple layers of nested archives, so a ZIP contains a ZIP that contains another ZIP before the actual executable appears. Each layer adds friction for single-pass scanners and manual review, and the technique is widely used to smuggle malware through email gateways and web uploads. This demo uses a benign file buried several levels deep to reproduce the delivery pattern safely. MetaDefender Archive Engine recursively unpacks archives across every nesting level, applies deep scanning to each extracted file, and enforces configurable limits on depth and file count so compressed bombs and deeply hidden payloads cannot escape detection.