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How to detect files modified by a hacker

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*gafesi    (2010-04-27)
How to detect files modified by a hacker

Hello, I would like to know how you detect files modified by a hacker who was not root but accessed the server by a user because of a website with a security breach, on a Linux server of course.

So far I found two methods :

1) Scan the server with rkhunter/rootkit
2) Verify files by order of last modification: ls -lt in the site folder and /tmp

Do you know any other method to find other files added or modified by a hacker?

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