It takes a company 243 days to discover a sophisticated attack, study shows. A report by Mandiant focusing on advanced persistent threats (APTs) outlined several findings, including that there are on average 243 days between an attacker gaining access and when the attack is uncovered.
Source: http://news.softpedia.com/news/It-Takes-a-Company-243-Days-toDiscover-a-Sophisticated-Attack-Study-Shows-337342.shtml
