tl;dr: Researchers demonstrate "RAMBO," an attack that exfiltrates data from air-gapped computers by having malware manipulate RAM access patterns to emit covert radio signals. Using a software-defined radio and basic antenna, an attacker can intercept and decode these signals from a distance, extracting files, keystrokes, and encryption keys at up to 1000 bits per second. The paper also outlines countermeasures to defend against this side-channel threat.