Hidden Lynx hackers appear to be both technically sophisticated and thorough. The group’s “watering hole” attack technique was seen earlier this year in an exploit of an iOS development site, which led to intrusions at Apple, Facebook, Microsoft and Twitter. Other attackers have likely been learning from the group’s success and emulating its techniques, says Symantec. The hackers appear not to be basking in their past glories, but “they are continuing to refine and streamline their operations and techniques to stay one step ahead””]