Backdoor in Joomla Core Files

When a friend asked if I could make some changes to his website, I agreed thinking I’ll be modifying some PHP or Javascript files. Turns out he was using Joomla. I normally wouldn’t attempt to modify files from a CMS like Joomla especially since I have no experience doing so.
I decided to do some research and found this great post from Fioravante Souza at Sucuri Security.

https://blog.sucuri.net/2016/05/unexpected-backdoor-fake-core-files.html

He found malware embedded in the core files of Joomla. I suggest you read the post and check your own Joomla files for any anomalies.

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