Re: Audit

Hector · ‎12-27-2018

Hi Team,

If i need to eliminate/omited the followin lines. How can I do?

-a always,exit -F arch=b64 -S execve -F key=MF689BBBE808804A22B2FA6C8828EE2CEB -a always,exit -F arch=b32 -S execve -F key=MF689BBBE808804A22B2FA6C8828EE2CEB -a always,exit -F arch=b64 -S dup,dup2,utime,utimes,futimesat,utimensat -F key=MF689BBBE808804A22B2FA6C8828EE2CEB -a always,exit -F arch=b32 -S utime,dup,dup2,utimes,futimesat,utimensat -F key=MF689BBBE808804A22B2FA6C8828EE2CEB -a always,exit -F arch=b64 -S dup,dup2,clone,fork,vfork,execve,exit,utime,adjtimex,settimeofday,exit_group,utimes,futimesat,utimensat -F key=MF689BBBE808804A22B2FA6C8828EE2CEB -a always,exit -F arch=b32 -S exit,fork,execve,utime,dup,dup2,settimeofday,clone,adjtimex,vfork,exit_group,utimes,futimesat,utimensat -F key=MF689BBBE808804A22B2FA6C8828EE2CEB -a always,exit -F arch=b64 -S dup,dup2,clone,fork,vfork,execve,exit,utime,adjtimex,settimeofday,exit_group,utimes,futimesat,utimensat -F key=MF77544730A04842DF8778C78DBED6F0FA -a always,exit -F arch=b32 -S exit,fork,execve,utime,dup,dup2,settimeofday,clone,adjtimex,vfork,exit_group,utimes,futimesat,utimensat -F key=MF77544730A04842DF8778C78DBED6F0FA -a always,exit -F arch=b64 -S execve -F key=MFF69DB48D30D540EAAD792CD3C8FFD503 -a always,exit -F arch=b32 -S execve -F key=MFF69DB48D30D540EAAD792CD3C8FFD503 -a always,exit -F arch=b64 -S dup,dup2,utime,utimes,futimesat,utimensat -F key=MFF69DB48D30D540EAAD792CD3C8FFD503 -a always,exit -F arch=b32 -S utime,dup,dup2,utimes,futimesat,utimensat -F key=MFF69DB48D30D540EAAD792CD3C8FFD503

regards

williamwlk · ‎12-28-2018

Hi @Hector

Let's start from here.

Please give us an output of

sudo auditctl -l

OR

Please play around with this:

Main directory:

/etc/audit

How to interpret your audit logs:

-a action list: always log on syscall exit
-F field
-S syscall: execve
-k Logging Key: programs

auditctl - l - List current rule set

More examples :

https://github.com/EricGershman/auditd-examples

Cheers.
Will

Hector · ‎12-28-2018

[root@lxhomoora5 ~]# auditctl -l
-w /etc/pam.d/ -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/samba/ -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/passwd -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/shadow -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
[root@lxhomoora5 ~]#

Hector · ‎12-28-2018

[root@lxhomoora5 audit]# cat audit.rules
## This file is automatically generated from /etc/audit/rules.d
-D
-b 320

-w /etc/pam.d/ -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/samba/ -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/passwd -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/shadow -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB

[root@lxhomoora5 audit]# pwd
/etc/audit
[root@lxhomoora5 audit]#

williamwlk · ‎12-28-2018

Hi @Hector

@Hector wrote:
[root@lxhomoora5 audit]# cat audit.rules
## This file is automatically generated from /etc/audit/rules.d
-D
-b 320
-w /etc/pam.d/ -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/samba/ -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/passwd -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/shadow -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
[root@lxhomoora5 audit]# pwd
/etc/audit
[root@lxhomoora5 audit]#

Per your 'auditctl -l', those rules that you wanted to ommit were not loaded. Thus, you have achieved what you wanted though not sure what you did.

Otherwise, you would have seen something like this:

[root@myrhel0 ~]# auditctl -l
-a always,exit -F arch=b64 -S execve -F key=MF689BBBE808804A22B2FA6C8828EE2CEB
-a always,exit -F arch=b32 -S execve -F key=MF689BBBE808804A22B2FA6C8828EE2CEB
-a always,exit -F arch=b64 -S dup,dup2,utime,utimes,futimesat,utimensat -F key=MF689BBBE808804A22B2FA6C8828EE2CEB
-a always,exit -F arch=b32 -S utime,dup,dup2,utimes,futimesat,utimensat -F key=MF689BBBE808804A22B2FA6C8828EE2CEB
-a always,exit -F arch=b64 -S dup,dup2,clone,fork,vfork,execve,exit,utime,adjtimex,settimeofday,exit_group,utimes,futimesat,utimensat -F key=MF689BBBE808804A22B2FA6C8828EE2CEB
-a always,exit -F arch=b32 -S exit,fork,execve,utime,dup,dup2,settimeofday,clone,adjtimex,vfork,exit_group,utimes,futimesat,utimensat -F key=MF689BBBE808804A22B2FA6C8828EE2CEB
-a always,exit -F arch=b64 -S dup,dup2,clone,fork,vfork,execve,exit,utime,adjtimex,settimeofday,exit_group,utimes,futimesat,utimensat -F key=MF77544730A04842DF8778C78DBED6F0FA
-a always,exit -F arch=b32 -S exit,fork,execve,utime,dup,dup2,settimeofday,clone,adjtimex,vfork,exit_group,utimes,futimesat,utimensat -F key=MF77544730A04842DF8778C78DBED6F0FA
-a always,exit -F arch=b64 -S execve -F key=MFF69DB48D30D540EAAD792CD3C8FFD503
-a always,exit -F arch=b32 -S execve -F key=MFF69DB48D30D540EAAD792CD3C8FFD503
-a always,exit -F arch=b64 -S dup,dup2,utime,utimes,futimesat,utimensat -F key=MFF69DB48D30D540EAAD792CD3C8FFD503
-a always,exit -F arch=b32 -S utime,dup,dup2,utimes,futimesat,utimensat -F key=MFF69DB48D30D540EAAD792CD3C8FFD503
-w /etc/pam.d -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/samba -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/passwd -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB
-w /etc/shadow -p wa -k MF689BBBE808804A22B2FA6C8828EE2CEB

And you will be able to see the rules at

/etc/audit/rules.d/*.rules

Agree? Or tell us more about what you are trying to really achieve.

Cheers.

Will

williamwlk · ‎01-02-2019

Hi @Hector

You find my reply helpful? Please let me know.

Will