I feel we are being fed a line here. I think it's unlikely that access to such important military computing infrastructure woud have been blown to stop Iran hijacking foreign flagged oil tankers.
Either the story is a cover for the real purpose of the operation (most likely), or the story is wildly overblown.
I actually thought it was just an article that tried to again make it seem like Iran was behind the previous attacks, despite there being no evidence. The owner of one tank said that the us statement that it was Iran was full of lies and didn't match any of the facts.
How does the US know that they don't just have offline backups?