exfiltrate

verb

1. (transitive)To withdraw (troops, operatives, etc.) surreptitiously from a dangerous position.

   “[B]ack in 2017, the CIA had exfiltrated a long-standing source who worked for Putin’s foreign policy chief and had been passing the agency secrets for years. There may be others still in place.”

2. (transitive)To covertly extract data.

   “There are multiple ways to exfiltrate files from a compromised system. Since you have ssh access, you can always use sftp or scp, but I want to show you another way of moving files using netcat.”

noun

1. that which is exfiltrated, the removed substance or item