Comment by joewee

The details on this are very vague. No one knows or is sharing the initial attack vector. It could be a browser spear phishing attack that then attempts to use known default passwords for these routers and uploads a custom firmware image or backdoor script. The only thing that I don't get is why rebooting resolves the issue. This can't be accurate, if the compromise was via a user, its only a temporary resolution, and if the backdoor is as sophisticated as they say, it should definitely have persistence that last beyond reboot.