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Possible root kit
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Thread: Possible root kit

  1. #1

    Possible root kit

    I was just running my rootkit checker like i usually do, and this came up:

    Checking `lkm'... You have 12 process hidden for ps command
    Warning: Possible LKM Trojan installed

    Ive run it a few times now, and the number of processes change, ive also had 5 and 9
    So, how do i work out exactly what it is and how do i get rid of it?

    Redhat 8.0, kernel 2.4.18-14

    Cheers,
    Alastair
    whatdoyougetwhenyoumultiplysixbynine??

  2. #2

    Re:Possible root kit

    its ok, i upgraded to the latest version of chkrootkit (chkrootkit.org) and all is well. it appeared to be somehting to do with the tools psyche was compiled with
    whatdoyougetwhenyoumultiplysixbynine??

  3. #3
    JimH
    Guest

    Re:Possible root kit

    Quote Originally Posted by alastair
    kernel 2.4.18-14
    Why are you running a kernel that has been updated for security reasons? ???

    Jim H

  4. #4
    Aaron_Adams
    Guest

    Re:Possible root kit

    If you're worried at all about LKM rootkits you could always disable LKM support, the next time you compile a kernel. Having drivers built into the kernel is faster anyway.

    As long as all your hardware is supported during the kernel configuration it won't be a problem. If there ever comes a time that you get something unsupported, you can recompile.

    I'm going to be writing a kernel module that detects when kernel modules are inserted, and emails me. (or something similar). This way, even if someone inserts a hidden LKM, I'll know it was inserted. Fun fun.

    chkrootkit isn't the most reliable program for rootkits either. (although it's still good to run on a regular basis) Considering there are a fair amount of people out there that are constantly building custom rootkits, I wouldn't rely on chkrootkit to find them all, especially since, afaik, it uses signatures from mostly public rootkits only.

    Your best bet is to implement some inbetween (like the LKM I want to write), or an IDS.


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