Anti-spam filtering and firewalls can provide a strong level of protection against malware entering the network. Whilst it is important to prioritise the blocking of incoming malware, having the ability to identify suspicious behaviour from an attacker who has managed to bypass these controls is extremely valuable. Known as ‘Advanced Persistent Threats’ or APTs, the more capable attackers typically avoid causing disruption to your network. Instead, they will slowly attempt to access systems and extract valuable data, including business and personal information. APTs can remain undetected for years, slowly leaking data and even using a company’s network as a base for other attacks.