Unnamed sources in the US Intelligence Community are telling the Washington Post that Russia's GRU was responsible for the hack that marred the Pyeongchang Winter Olympics' opening ceremonies. The US sources also assert that it was a false-flag operation intended to look like a North Korean hack. 

If so, two things are noteworthy. First, the imposture was pretty thin, because suspicion fell almost immediately on Russia. Second, the GRU, Russia's military intelligence service, is the lair of Fancy Bear. Fancy Bear, in apparent retaliation for anti-doping sanctions against the Russian team, had begun doxing the International Olympic Committee and individual non-Russian athletes late last year.

Sentiment in favor of some form of international modus vivendi in cyberspace grows, especially in the tech industry.

Researchers at Qihoo 360 Netlab say an unnamed ad network installs cryptojackers via advertising it serves on its customer sites. It's using a domain generation algorithm to evade ad blockers.

T-Mobile patches a bug that could have enabled customer account hijacking through the company's website. Whether the vulnerability was actually exploited is unknown.

PhishMe has been acquired by a consortium of private equity investors for a reported $400 million. The company will rebrand itself as "Cofense," the better, it says, to reflect the range of its offerings.

Australia's Defense Department joins its US counterpart in banning Huawei and ZTE phones as security risks. Huawei sees the bans as a move in a trade war prompted by industry fears of the Chinese companies' potential to dominate the market.