Rkhunter reports change in file properties, but I don’t see that they’ve been updated by yum

hackingpackagesrkhunterupdateyum

Maybe I'm being overcautious, but I recently received the following warnings from rkhunter:

Warning: The file properties have changed:
        File: /bin/dmesg
        Current hash: e94b12f49e53695bf5161a445c00b3f97e37e9a8
        Stored hash : 4cc922b102987beea5ec3e10f283b08cfd942658
        Current file modification time: 1263983792 (20-Jan-2010 05:36:32)
        Stored file modification time : 1252007551 (03-Sep-2009 15:52:31)
Warning: The file properties have changed:
        File: /bin/kill
        Current hash: 12f2d4e21474ccdb989c9ee4d4102917e51d8d7b
        Stored hash : 8e14ca5dbdc158a833c2d861bf682e31aae24675
        Current file modification time: 1263983792 (20-Jan-2010 05:36:32)
        Stored file modification time : 1252007551 (03-Sep-2009 15:52:31)
Warning: The file properties have changed:
        File: /bin/logger
        Current hash: 08f2886e3ef1fa5adb34ed8b24477362206f85c6
        Stored hash : c2bf21ac162bc7de5f6c0b787c304707127e5d96
        Current file modification time: 1263983792 (20-Jan-2010 05:36:32)
        Stored file modification time : 1252007551 (03-Sep-2009 15:52:31)
Warning: The file properties have changed:
        File: /bin/login
        Current hash: d05eb12a1184d3babcf3380674293974b8a2dcce
        Stored hash : 4849447380595bbff3aacc1a1ac90e59f7289ca6
        Current file modification time: 1263983792 (20-Jan-2010 05:36:32)
        Stored file modification time : 1252007551 (03-Sep-2009 15:52:31)
Warning: The file properties have changed:
        File: /bin/more
        Current hash: e2bad443495de0c23be2f87f836f80eafa3ba330
        Stored hash : afb55b42873a210a5cec07baa106faa3829cae41
        Current file modification time: 1263983792 (20-Jan-2010 05:36:32)
        Stored file modification time : 1252007551 (03-Sep-2009 15:52:31)
Warning: The file properties have changed:
        File: /bin/mount
        Current hash: cfda891d89dc57c94327bd62845f8ef13c42ff54
        Stored hash : 32d8659bad80b43acc4e437510a88491c9c53294
        Current file modification time: 1263983789 (20-Jan-2010 05:36:29)
        Stored file modification time : 1252007547 (03-Sep-2009 15:52:27)
Warning: The file properties have changed:
        File: /usr/bin/kill
        Current hash: 12f2d4e21474ccdb989c9ee4d4102917e51d8d7b
        Stored hash : 8e14ca5dbdc158a833c2d861bf682e31aae24675
        Current file modification time: 1264059189 (21-Jan-2010 02:33:09)
        Stored file modification time : 1256283752 (23-Oct-2009 03:42:32)
Warning: The file properties have changed:
        File: /usr/bin/logger
        Current hash: 08f2886e3ef1fa5adb34ed8b24477362206f85c6
        Stored hash : c2bf21ac162bc7de5f6c0b787c304707127e5d96
        Current file modification time: 1264059189 (21-Jan-2010 02:33:09)
        Stored file modification time : 1256283752 (23-Oct-2009 03:42:32)
Warning: The file properties have changed:
        File: /usr/bin/whereis
        Current hash: 0d700404e6cfd49bc1ef39465a586706b3b9f008
        Stored hash : 1552446e1285fd3d361e0198149e0a946ee7f28b
        Current file modification time: 1263983792 (20-Jan-2010 05:36:32)
        Stored file modification time : 1252007551 (03-Sep-2009 15:52:31)
Warning: The file properties have changed:
        File: /sbin/nologin
        Current hash: 01b82549a312108b655cca21993d2b24a56f3c7e
        Stored hash : 61255119451e25eb27e6e9a4ca67219564896d4f
        Current file modification time: 1263983792 (20-Jan-2010 05:36:33)
        Stored file modification time : 1252007551 (03-Sep-2009 15:52:31)
Warning: The file properties have changed:
        File: /usr/sbin/vipw
        Current hash: da7bc573ef2c55f1f7e1a7ebb964dbf1187c2702
        Stored hash : dc50bdcb381833d6e8e12cc7af81b37a0b3c4c8e
        Current file modification time: 1263983792 (20-Jan-2010 05:36:32)
        Stored file modification time : 1252007551 (03-Sep-2009 15:52:31)

Normally, I check the yum logs to see if these files had recently been updated, but I don't see that they have:

Jan 21 02:33:08 Updated: 30:bind-libs-9.3.6-4.P1.el5_4.2.x86_64
Jan 21 02:33:08 Updated: perl-Compress-Raw-Zlib-2.024-1.el5.rf.x86_64
Jan 21 02:33:08 Updated: perl-Compress-Raw-Bzip2-2.024-1.el5.rf.x86_64
Jan 21 02:33:09 Updated: 30:bind-9.3.6-4.P1.el5_4.2.x86_64
Jan 21 02:33:09 Updated: 1:cups-libs-1.3.7-11.el5_4.5.x86_64
Jan 21 02:33:11 Updated: util-linux-2.13-0.52.el5_4.1.x86_64
Jan 21 02:33:11 Updated: gzip-1.3.5-11.el5.centos.1.x86_64
Jan 21 02:33:11 Updated: perl-IO-Compress-2.024-1.el5.rf.noarch
Jan 21 02:33:16 Updated: 30:caching-nameserver-9.3.6-4.P1.el5_4.2.x86_64
Jan 21 02:33:18 Updated: kernel-headers-2.6.18-164.11.1.el5.x86_64
Jan 21 02:33:18 Updated: 1:cups-libs-1.3.7-11.el5_4.5.i386

Am I missing something when I look at the log file? Would one of those packages result in the update of all of those packages? Maybe util-linux?

I know running rkhunter –propupd will reset the base file info that it scans for, but I just want to make sure that I shouldn't be worried about these results first. The packages that were altered seem like they could be utilized in a hacking attempt.

running last does not show any suspicious logins.

Best Answer

I just used the command "yum provides /path/binary" on a 64bit CentOS box I have here and all of those binaries are part of the util-linux package. Which is listed in your recent updates.

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