The HookAds malvertising campaign has been active lately and redirecting visitors to the Fallout Exploit Kit. Once the kit is activated, it will attempt to exploit known vulnerabilities in Windows to install different malware such as the DanaBot banking Trojan, the Nocturnal information stealer, and GlobeImposter ransomware. Under the right circumstances, a visitor will silently load the Fallout exploit kit, which will try and install its malware payload. If the redirected user is running Internet Explorer, the payload will be installed to install the payload.
Source: https://www.bleepingcomputer.com/news/security/hookads-malvertising-installing-malware-via-the-fallout-exploit-kit/