[CentOS] Changes to inodes discovered by aide

Jobst Schmalenbach jobst at barrett.com.au
Mon Oct 1 00:03:45 EDT 2012


Hi

Correct, looking at the log of "prelink.full" and "prelink.quick" the
times match the inode changes using "aide -c".

thanks
Jobst


On Fri, Sep 28, 2012 at 09:31:19AM +0100, Tony Molloy (tony.molloy at ul.ie) wrote:
> On Friday 28 September 2012 03:03:31 Jobst Schmalenbach wrote:
> > Hi.
> > 
> > On one of my servers aide just reported inode changes to a large
> >  bunch of files in a variety of directories, e.g. /usr/bin,
> >  /usr/sbin etc. This machine sits behind a couple of firewalls and
> >  it would be hard to get to.
> > 
> > The day before I updated "clam*" and updated the aide database
> >  right after that:
> > 
> >   -rw-------  1 root root 7407412 Sep 26 10:58 aide.db.gz
> > 
> > 
> > The problem was that the changes were made when no-one was in the
> >  office, here are a few:
> > 
> >    Directory: /usr/sbin
> >      Mtime    : 2012-09-26 10:55:15              , 2012-09-27
> >  06:36:42 Ctime    : 2012-09-26 10:55:15              , 2012-09-27
> >  06:36:42 File: /usr/sbin/wpa_supplicant
> >      Ctime    : 2012-09-07 06:39:44              , 2012-09-27
> >  06:36:40 Inode    : 2490595                          , 2490536 MD5
> >       : IVNJESmXwIG9XY0MowL3CA==         , DUQMpFMsKqlZgjOmJIp3OQ==
> >  RMD160   : 4xuWhqqliTLM5Jx6zAvQ9f1PY1c=     ,
> >  AlSPQGiVe+/T8YdHDSIypI904kA= SHA256   :
> >  OaUWNIGUS9AhXEjV3p8Cg4TeIEjuQ/tu ,
> >  z1c9XCKVyjDzDuN7t32B+sbj6nil90TK File: /usr/sbin/clamav-milter
> >      Size     : 202453                           , 206637
> >      Ctime    : 2012-09-26 10:55:15              , 2012-09-27
> >  06:36:37 Inode    : 2490507                          , 2490625 MD5
> >       : HoONWy9q+qbRzHtlTeR6Wg==         , klWTxNFmL8MEAQmIPwvHxg==
> >  RMD160   : lfa72Vrh6Q2DWjf+UIxREAK4V1Y=     ,
> >  MPbEoKH/ws3aWA+sBuycRvU9DP0= SHA256   :
> >  aFRvKcA999IPRFJ2qByu8aKB6QmHpW5i ,
> >  u0oTtBkHjchhlY8AIejOfKPoJRencpmK
> > 
> > 
> > Yum does not report anything (last 4 lines os yum.log)
> > 
> >    Sep 21 10:40:11 Installed: ghostscript-fonts-5.50-13.1.1.noarch
> >    Sep 26 10:55:14 Updated: clamav-0.97.6-1.el5.rf.x86_64
> >    Sep 26 10:55:15 Updated: clamd-0.97.6-1.el5.rf.x86_64
> >    Sep 26 10:55:15 Updated: clamav-milter-0.97.6-1.el5.rf.x86_64
> > 
> > I ran (a fresh install) of rkhunter, did not find a thing ...
> > 
> > Is it possible that a change to one file sets of a domino effect of
> >  indode changes?
> > 
> > 
> > thanks
> > Jobst
> > 
> 
> Just a thought. I run tripwire, planning to switch to aide, and 
> occasionally see the same. Lots of changes reported reported in /bin 
> type directories. In my case it's caused by a run of prelink updating 
> lots of files in /bin.
> 
> Tony
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-- 
Though the pen IS mightier than the sword, the sword is mightier at any given moment.

  | |0| |   Jobst Schmalenbach, jobst at barrett.com.au, General Manager
  | | |0|   Barrett Consulting Group P/L & The Meditation Room P/L
  |0|0|0|   +61 3 9532 7677, POBox 277, Caulfield South, 3162, Australia
 


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