Have you ever heard someone scream “Avalanche!!”?? Well that’s not what this is. This Avalanche is a “large global network hosting infrastructure used by cyber criminals to conduct phishing and malware” that is affecting Microsoft Windows users. This could cost lots of money if they get any of your information or hold your computer for “ransom” until you pay them. These cyber criminals have targeted lots of financial institutions and have even tricked their victims into conducting some other type of malicious activity such as running money mule schemes.
“Avalanche infrastructure was used to run money mule schemes where criminals recruited people to commit fraud involving transporting and laundering stolen money or merchandise.”
You can read more here: https://www.us-cert.gov/ncas/alerts/TA16-336A