It does mislead the reader, because this pattern is the case for most malware, and has been for over a decade. If you only work on it on weekdays, you are probably not a CIA hacker.
I disagree. The headline clearly states that if you only work on weekdays you "might" be a CIA hacker, implicitly admitting that there are also non CIA hackers working on weekdays. What I found funny and interesting about this is that if I were working on malware and making exciting progress I definitely would not be able to resist working on the weekend. The idea that there is a government employee who is paid to create malware but sees it just a 9-5 thing that he doesn't care about when he clocks out is pretty funny to me.
I don't know this for a fact, but I assume people working on top secret CIA malware probably can't work from home. They'd have to go into the office and access the code from a secure computer.