From Fox News:
U.S. intelligence agencies last week urged the Obama administration to check its new healthcare network for malicious software after learning that developers linked to the Belarus government might have helped produce the website, raising fresh concerns that private data posted by millions of Americans will be compromised.
The intelligence agencies notified the Department of Health and Human Services, the agency in charge of the HealthCare.gov network, about their concerns.
Specifically, officials warned that programmers in Belarus, a former Soviet republic closely allied with Russia, were suspected of inserting malicious code that could be used for cyber attacks, according to U.S. officials familiar with the concerns.