Re: Do I have an infected init file?

From: Matt Piechota (
Date: 05/12/05

  • Next message: FreeBSD Security Advisories: "FreeBSD Security Advisory FreeBSD-SA-05:09.htt"
    Date: Thu, 12 May 2005 16:57:30 -0400 (EDT)
    To: DH <>

    On Thu, 12 May 2005, DH wrote:

    > I'm running a FreeBSD 4.10-release-p2 box and both chkrootkit 0.44 &
    > 0.45 report that my /sbin/init file is infected.

    I should mention that 4.10-release is up to p13. You should really think
    about patching up to current.

    > It appears as though the egrep for "UPX" in the output of "strings"
    > triggers the infected notice. When I copy the init file from an
    > uninfected box to this one chkrootkit continues to report it as
    > infected. Is chkrootkit reading a copy of the /sbin/init file stored in
    > active memory? If my machine is compromised, which rootkit is installed
    > / how can I find out which rootkit is installed?

    The easiest way to figure out if you are rooted is probably to download or
    create a clean version of /sbin/init, and compare the two files.
    Creating might take some work, you'd have to install a clean 4.10, patch
    it to p2, and make world.

    Matt Piechota
    Key Available from
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