More than 4.5 million DSL modems have been compromised as part of a sustained hacking campaign in Brazil. Vulnerability exploited by attackers allowed the use of a script to steal passwords and remotely access the configuration of modems. Attackers sought to steal users’ banking credentials by redirecting users to false versions of popular sites like Facebook or Google and prompting them to install malware. Some 40 DNS servers were set up outside Brazil too in order to serve forged requests for domain names belonging to Brazilian banks.
Source: https://thehackernews.com/2012/10/millions-of-dsl-modems-hacked-in-brazil.html