Placing the malware deep in the Russian network, which had never been attempted before, is said to be partly a warning, according to The Times, enabling the US to carry out cyber attacks if it does considerable conflict comes Russia.
Two government officials told the Times that they believed that President Donald Trump was not fully informed about the implantation of US computer code into the Russian network.
Pentagon and intelligence officials describe the Times as "far-fetched" trump card over the details of the operations against Russia. They tell the Times that they are worried about how Trump would react, and that Trump might be able to undo or discuss operations with foreign officials.
In interviews with current and former government officials over the last three months with the Times, officials describe the use of US computer code in Russia's grid and other goals as part of a shift to a more offensive strategy.
Last summer, Trump assigned new authorities to the US Cyber Command, which is part of the Pentagon and directs the US military's defensive and offensive online operations, the Times reports. The classified document gives the commander of Cyber Command, General Paul Nakasone, the authority to conduct offensive online operations without the need for the President's approval.
The Trump administration refused to describe the Times specific measures it had taken under these new authorities.
Current and former officials tell the Times that the US has been feeding reconnaissance probes into the Russian network since at least 201
Nakasone's National Security Advisor and the White House, John Bolton, declined to hear spokesmen answer questions from The Times, and the White House did not respond to CNN's request for comment.
National Security Council officials refused to comment on the Times, but said they had no concerns about national security regarding the details of the Times' reporting.