On Thursday, the congressional staff was briefed by the Health and Human Services (HHS) about the systems of the HealthCare.gov website being breached in July.The attacker planted malware that allowed access to a server used for testing code for the website, according to the sources of Wall Street Journal, who reported the news first.Although the breach occurred in July, it was discovered as recently as August 25and an immediate investigation was deployed in order to determine the damage…