It’s been a year since Colonial Pipeline, the largest fuel pipeline in the U.S., suffered a ransomware attack resulting from a single compromised password. DarkSide, the hackers responsible for the attack, stole nearly 100 gigabytes of data and threatened to leak it unless their demand of $4.4 million was paid.

Colonial Pipeline paid the ransom ($4.5 million) to get their data back, and approximately $2.2 million was later recovered by the Department of Justice.