They lost funds because the hackers were able to reroute the traffic intended for MyEtherWallet and sent them instead to a malicious site which pretty much just absorbed the funds being stored in the wallets of the individuals who logged into their wallet via the malicious site.
It’s been noted that the most impressive aspect to this hack isn’t the amount of Ethereum taken, but instead how the hackers were able to identify and take advantage of certain internet protocols like the Domain Name System (DNS).
In defense of the legit MyEtherWallet site, there was a warning issued highlighting the invalid security certificate.
There was a kind of tragic report from a man who apparently went to the MEW site and then * despite the security warning *, continued to log into his wallet and was greeted with a 10 second timer counting down the time until all of his funds would be transferred to the hacker.
It’s pretty cool, essentially you can download an offline version of MyEtherWallet.
This means you don’t need to trust that the web servers are directing you to the legitimate MyEtherWallet web page.
Once your computer is disconnected from any internet connection, or if you want to use this on a computer that has never had access to the internet in the first place, you can plug in this USB drive and extract these files onto your computer.
Once you’re ready to interact with this offline version of MyEtherWallet, you can do so by selecting the index.html file which will open your web browser (even if you are not connected to an internet connection.)
From here you’ll be able to generate new wallets and send transactions by using the “Send Offline” section, all while being disconnected from the internet.
The MyEtherWallet team does reccommend periodically updating your now local version of MEW since they do update the actual website from time to time.
More about the newest hack
MyEtherWallet GitHub
MEW guide for Offline access