The FBI issued an alert related the APT6 state-sponsored hacking group that has compromised the US Government networks for years. The FBI revealed that a group of malicious cyber actors have compromised and stolen sensitive information from various government and commercial networks since at least 2011. The alert includes a list of 59 Indicators of Compromise, it is a collection of websites used by hackers as command and control servers to carry spear phishing campaigns on target organizations. The domains used by the hackers were dismissed in late December 2015.”]
Source: https://securityaffairs.co/wordpress/46013/cyber-warfare-2/apt6-state-sponsored-hackers.html