So if he ran the powershell at midnight he could have potentially gone unnoticed until the IT guys got back in the office? What if this was a global Corp, woul

So if he ran the powershell at midnight he could have potentially gone unnoticed until the IT guys got back in the office? What if this was a global Corp, would someone be monitoring this 24/7 across timezones? What kind of damage could he have done if he had, say, 1 hour of unfettered access?