[CentOS] mystery process "unit"

[Rainer Duffner]

sbeam schrieb:

> On Tuesday 12 August 2008 09:08, Mr Shunz wrote:
>   
>> maybe you should check with "lsof -p 3041" and see which files/pipes it
>> uses to have a clue.
>>     
>
> of course! <slap>
>
> it's a perl w0rm that was uploaded last night, now killed. Now to determine 
> how it got in.
>
> I found some output in the main apache error log that looks like wget was used 
> to download a shellbot. But I can't figure out how wget was called, may be 
> some PHP exec() call that is unchecked. 
>   


Anything in /tmp ?

Disable register_globals and allow_url_fopen.
Set open_basedir for any virtual hosts to the absolute minimum.

That will help a bit.



> But I can't find it on the system yet or the data files it uses.
>
> chkrootkit says all is clear.
>
> mod_security is now being installed, belatedly. This server has only been up 1 
> week, sheesh.
>
> thanks
> Sam
>
>   


It was most likely executed via a remote server. Look for URLs in the 
logs that fetch stuff from remote servers.



cheers,
Rainer