The sanctions will target Russian diplomats in the USA, as well as threatening the country's wider economy by banning the purchase of ruble bonds
The report details 18 pieces of malware used in the attack, including the Sunshuttle backdoor, China Copper webshell and covert Sibot tool
The intelligence value of hacking the DHS's emails is unknown, but the symbolism is clear
The researchers found a 'major overlap' between the hack group's victims and those targeted in the SolarWinds attacks
But Mimecast insists the code was 'incomplete'
SolarWinds CEO Sudhakar Ramakrishna said that the password had been in use as early as 2017
No quick fix to massive hack say security experts as a fourth malware strain is discovered
The operation appears to be an intelligence gathering effort, rather than an act of cyber warfare, agencies say