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