3:19 p.m.
All,
New auditd list member here. I just started playing around with auditd.
I was wondering if someone might be kind enough to answer a question I
have. I am attempting to create a rule that will audit privileged
commands for UID's greater than 500 but ignore one particular user that
falls under this rule. The user I am trying to ignore is the only user
that should be touching the file.
Below is the rule.
#### BEGIN RULE SNIP ####
## Ensure auditd Collects Information on the Use of Privileged Commands
-a always,exit -F path=/opt/varonis1.6.0106/bin/ls -F perm=x -F
auid>=500 -F auid!=4294967295 -F auid!=505 -k privileged
#### END RULE SNIP ####
Is the rule syntax above correct? If not how would I audit all users
with UID above 500 but still ignore one particular user?
Thank you and happy holidays,
--
BKJ
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8:10 a.m.
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Hash: SHA1
I'm hoping to be told otherwise, but the cleanest and most maintainable way that
I've seen to do this is to make two rules.
First Rule: Ignore user 505
Second Rule: Audit everyone
Auditd should stop at the first rule matched. It does add more rules but seems to be the
most stable across auditd versions.
Also, that auid!=42... should probably be near the top of your rules since it will get hit
the most and I'm assuming that you don't ever want to audit
anonymous accesses to most items.
Trevor
On 12/22/2011 04:19 PM, Bryan Jacobs wrote:
All,
New auditd list member here. I just started playing around with auditd. I was wondering
if someone might be kind enough to answer a question I have.
I am attempting to create a rule that will audit privileged commands for UID's
greater than 500 but ignore one particular user that falls under this
rule. The user I am trying to ignore is the only user that should be touching the file.
Below is the rule.
#### BEGIN RULE SNIP ####
## Ensure auditd Collects Information on the Use of Privileged Commands
-a always,exit -F path=/opt/varonis1.6.0106/bin/ls -F perm=x -F
auid>=500 -F auid!=4294967295 -F auid!=505 -k privileged
#### END RULE SNIP ####
Is the rule syntax above correct? If not how would I audit all users with UID above 500
but still ignore one particular user?
Thank you and happy holidays,
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7:32 p.m.
Trevor,
Thank you for the information. I have not had a chance to test it out yet
but this is what I ended up doing from your adviceĀ.
**** BEGIN SNIP RULES ****
## Ignore the Varonis account (to reduce audit noise)
-a always,exit -F path=/opt/varonis1.6.0106/bin/ls -F perm=x -F auid!=505
-F auid!=4294967295 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/bin/stat -F perm=x -F
auid!=505 -F auid!=4294967295 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/utils/vrns_all_accounts -F
perm=x -F auid!=505 -F auid!=4294967295 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/utils/vrns_diag.sh -F perm=x
-F auid!=505 -F auid!=4294967295 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/utils/vrns_local_accounts -F
perm=x -F auid!=505 -F auid!=4294967295 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/utils/vrns_stat -F perm=x -F
auid!=505 -F auid!=4294967295 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/vrns_mond -F perm=x -F
auid!=505 -F auid!=4294967295 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/vrns_statd -F perm=x -F
auid!=505 -F auid!=4294967295 -k privileged
## Apply the Varonis rules to everyone else with UID 500 and above
-a always,exit -F path=/opt/varonis1.6.0106/bin/ls -F perm=x -F auid>=500
-F auid!=4294967295 -F auid!=505 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/bin/stat -F perm=x -F
auid>=500 -F auid!=4294967295 -F auid!=505 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/utils/vrns_all_accounts -F
perm=x -F auid>=500 -F auid!=4294967295 -F auid!=505 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/utils/vrns_diag.sh -F perm=x
-F auid>=500 -F auid!=4294967295 -F auid!=505 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/utils/vrns_local_accounts -F
perm=x -F auid>=500 -F auid!=4294967295 -F auid!=505 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/utils/vrns_stat -F perm=x -F
auid>=500 -F auid!=4294967295 -F auid!=505 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/vrns_mond -F perm=x -F
auid>=500 -F auid!=4294967295 -F auid!=505 -k privileged
-a always,exit -F path=/opt/varonis1.6.0106/vrns_statd -F perm=x -F
auid>=500 -F auid!=4294967295 -F auid!=505 -k privileged
**** END SNIP RULES ****
Hope this works.
On 12/29/11 9:10 AM, "Trevor Vaughan" <peiriannydd(a)gmail.com> wrote:
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Hash: SHA1
I'm hoping to be told otherwise, but the cleanest and most maintainable
way that I've seen to do this is to make two rules.
First Rule: Ignore user 505
Second Rule: Audit everyone
Auditd should stop at the first rule matched. It does add more rules but
seems to be the most stable across auditd versions.
Also, that auid!=42... should probably be near the top of your rules
since it will get hit the most and I'm assuming that you don't ever want
to audit
anonymous accesses to most items.
Trevor
On 12/22/2011 04:19 PM, Bryan Jacobs wrote:
> All,
>
> New auditd list member here. I just started playing around with
>auditd. I was wondering if someone might be kind enough to answer a
>question I have.
> I am attempting to create a rule that will audit privileged commands
>for UID's greater than 500 but ignore one particular user that falls
>under this
> rule. The user I am trying to ignore is the only user that should be
>touching the file.
>
> Below is the rule.
>
> #### BEGIN RULE SNIP ####
>
> ## Ensure auditd Collects Information on the Use of Privileged Commands
>
> -a always,exit -F path=/opt/varonis1.6.0106/bin/ls -F perm=x -F
> auid>=500 -F auid!=4294967295 -F auid!=505 -k privileged
>
> #### END RULE SNIP ####
>
> Is the rule syntax above correct? If not how would I audit all users
>with UID above 500 but still ignore one particular user?
>
>
> Thank you and happy holidays,
>
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This email message is for the sole use of the intended recipient(s) and may contain
confidential and privileged information. Any unauthorized review, use, disclosure or
distribution is prohibited. If you are not the intended recipient, please contact the
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in this message are those of the author, except where the sender specifically states them
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8:13 a.m.
On Thursday, December 22, 2011 04:19:34 PM Bryan Jacobs wrote:
I am attempting to create a rule that will audit privileged
commands for UID's greater than 500 but ignore one particular user that
falls under this rule. The user I am trying to ignore is the only user
that should be touching the file.
Below is the rule.
#### BEGIN RULE SNIP ####
## Ensure auditd Collects Information on the Use of Privileged Commands
-a always,exit -F path=/opt/varonis1.6.0106/bin/ls -F perm=x -F
auid>=500 -F auid!=4294967295 -F auid!=505 -k privileged
#### END RULE SNIP ####
Is the rule syntax above correct?
This looks correct to me.
-Steve
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3 comments
3 participants
participants (3)
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Bryan Jacobs -
Steve Grubb -
Trevor Vaughan