This is an example of a logic bomb, a piece of malicious software that is configured to trigger its payload when some future conditions are met. In this case, the attacker programmed the software to wait until a certain time and then disable itself. A remote access trojan, or RAT, is malware that allows the attacker to access the infected system. There’s no discussion of that happening in this situation. In fact, there’s no indication that any malware was used in the attack, which tells us that the attack wasn’t a regular Trojan horse or a worm either.