New ask Hacker News story: What is this advanced fee scam for sysadmin jobs?

What is this advanced fee scam for sysadmin jobs?
3 by tomcam | 3 comments on Hacker News.
An acquaintance has applied for a sysadmin job that supposedly advances $4,500 from a Wells Fargo account. For context, this person is 62 and has no sysadmin experience. Obviously a scam--but how does the scam work?