Five of the eight largest health care security breaches of the last five years happened during the first six months of 2015. 2015 also saw significant extortion-related activity, including attempts to extort money from victims of the Ashley Madison breach. We shouldnt forget the age-old spam and scam issues, such as spear-phishing and links in emails are still utilized by attackers to infect systems or direct victims to malicious URLs. In December alone, Adobe patched almost 100 vulnerabilities in Flash in Flash.”]
Source: https://securityintelligence.com/2015-an-eventful-year-in-cybersecurity/