Re: need help interpreting ausearch results

[Stefano Schiavi <stefanoschiavi00@gmail.com>]

Hello,

Could anyone help with this? I really don't know where else to ask.

Thank you very much.
Stefano


On 12/15/13, 12:19 AM, Stefano Schiavi wrote:
> Hello,
>
> Thank you Steve and all for keeping up the great work here.
>
> Some time ago I setup some audit rules to monitor what would change 
> the permissions of the public_html directory since we found that once 
> in a while it would change to 777 out of the blue.
>
> It happened again yesterday and I believe these parts of the log 
> represent when the issue happened:
>
> type=PATH msg=audit(1386933561.795:7958476): item=2 name="./www" 
> inode=4980752 dev=08:08 mode=0120777 ouid=501 ogid=501 rdev=00:00
> type=PATH msg=audit(1386933561.795:7958476): item=1 name="./" 
> inode=4980737 dev=08:08 mode=040711 ouid=501 ogid=501 rdev=00:00
> type=PATH msg=audit(1386933561.795:7958476): item=0 name="public_html"
> type=CWD msg=audit(1386933561.795:7958476):  cwd="/home/lanogbar"
> type=SYSCALL msg=audit(1386933561.795:7958476): arch=c000003e 
> syscall=88 success=yes exit=0 a0=1306d160 a1=1306d200 a2=11 a3=0 
> items=3 ppid=18728 pid=18731 auid=0 uid=501 gid=501 euid=501 suid=501 
> fsuid=501 egid=501 sgid=501 fsgid=501 tty=(none) ses=117304 
> comm="gtar" exe="/bin/tar" key="lanogbar-www"
>
>
> This is just a guess though and I can not be sure as I have no 
> experience parsing the logs. Looking through with the I flag we can 
> see the following::
>
> type=PATH msg=audit(12/13/2013 15:00:03.759:7970202) : item=0 
> name=/home/lanogbar/public_html/ inode=4980744 dev=08:08 mode=dir,750 
> ouid=lanogbar ogid=nobody rdev=00:00
> type=CWD msg=audit(12/13/2013 15:00:03.759:7970202) : 
> cwd=/home/lanogbar/public_html
> type=SYSCALL msg=audit(12/13/2013 15:00:03.759:7970202) : arch=x86_64 
> syscall=chmod success=yes exit=0 a0=1585e520 a1=1ff a2=2f a3=146c1d40 
> items=1 ppid=27717 pid=8804 auid=root uid=lanogbar gid=lanogbar 
> euid=lanogbar suid=lanogbar fsuid=lanogbar egid=lanogbar sgid=lanogbar 
> fsgid=lanogbar tty=(none) ses=117304 comm=php exe=/usr/bin/php 
> key=lanogbar-public_html
>
> Do you think this is relevant?
> If so it would seem a php script was responsible.
>
> Would you have any suggestion on how to identify the script?
>
> Thank you very much for the very valuable help.
> Kind regards,
> Stefano