It's decision does not only pertain to Russia.
For instance, if Iran or any other country engage in similar activities, the USA will act against that countries Diplomatic offices if the responsible criminal activity is beyond the reach of Law Enforcement.
The Executive Order also covers any malicious acts by foreign governments against any US Government Agency, and infrastructure such as telecommunications and Electricity Grids and water supply.
Excellent Executive Order.
FACT SHEET: Actions in Response to Russian Malicious Cyber Activity and Harassment
https://www.whitehouse.gov/the-press-of ... tivity-and
Today, President Obama authorized a number of actions in response to the Russian government’s aggressive harassment of U.S. officials and cyber operations aimed at the U.S. election in 2016. Russia’s cyber activities were intended to influence the election, erode faith in U.S. democratic institutions, sow doubt about the integrity of our electoral process, and undermine confidence in the institutions of the U.S. government. These actions are unacceptable and will not be tolerated.
In response to the threat to U.S. national security posed by Russian interference in our elections, the President has approved an amendment to Executive Order 13964. As originally issued in April 2015, this Executive Order created a new, targeted authority for the U.S. government to respond more effectively to the most significant of cyber threats, particularly in situations where malicious cyber actors operate beyond the reach of existing authorities. The original Executive Order focused on cyber-enabled malicious activities that:
Harm or significantly compromise the provision of services by entities in a critical infrastructure sector;
Significantly disrupt the availability of a computer or network of computers (for example, through a distributed denial-of-service attack); or
Cause a significant misappropriation of funds or economic resources, trade secrets, personal identifiers, or financial information for commercial or competitive advantage or private financial gain (for example, by stealing large quantities of credit card information, trade secrets, or sensitive information).
The increasing use of cyber-enabled means to undermine democratic processes at home and abroad, as exemplified by Russia’s recent activities, has made clear that a tool explicitly targeting attempts to interfere with elections is also warranted. As such, the President has approved amending Executive Order 13964 to authorize sanctions on those who:
Tamper with, alter, or cause a misappropriation of information with the purpose or effect of interfering with or undermining election processes or institutions.