The Times said that the malware that was in the deepest part of the Russian grid had never been tried, but partly used to warn the US and allow them to carry out cyber-attacks in the event of serious conflict with Russia.
Two senior administration officials told The Times that they thought that President Donald Trump had not been informed in detail of the US computer code being implemented in the Russian grid.
Pentagon and intelligence officials told the Times "a wide hesitation" to inform Trump of details of the operations against Russia. They told the Times that Trump's reaction was causing concern, as well as the possibility of Trump overthrowing or discussing with foreign officials.
During interviews with the Times over the last three months, with current and former government officials, they described the deployment of US computer code in the Russian network and other goals as part of the program. a more offensive strategy.
Trump has released new authorities last summer for the US Cyber Command, which is part of the Pentagon and heads the US defensive and offensive online operations, the Times reports. The classified document gives the commander of Cyber Command, General Paul Nakasone, the power to conduct offensive online operations without requiring the approval of the president.
The Trump Administration declined to describe to the Times the specific actions it was undertaking under these new authorities.
Current and former officials told The Times that the United States has been putting reconnaissance probes into the Russian network since at least 2012.
Nakasone and White House National Security Advisor John Bolton refused, through spokespersons, to answer the Times' questions about the incursions and the White House did not respond to the request for comments from CNN.
National Security Council officials declined to comment on the Times, but said they did not have national security concerns about the details of the Times reports.