The median median number between intrusion and detection was 87 days, while the median from detection to containment was seven days. The findings were based on 691 data breach investigations conducted over the last year. The majority of organizations were notified of a possible infection by third parties, such as a regulatory body, bank, credit-card company, law enforcement, customer or partner. Two-thirds of the organizations in the study contained the malware in less than 10 days, the study found. The study found an increase in the number of companies using third parties to manage security.”]
Source: https://www.csoonline.com/article/2157540/why-companies-should-seek-help-in-malware-detection.html