Hi dan,
Decoders seems to work,
ossec-logtest example:
type=PATH msg=audit(1387218689.294:9245): item=0 name="/home/proof/proof/"
inode=475 dev=fd:00 mode=040555 ouid=0 ogid=0 rdev=00:00
**Phase 1: Completed pre-decoding.
full event: 'type=PATH msg=audit(1387218689.294:9245): item=0
name="/home/proof/proof/" inode=475 dev=fd:00 mode=040555 ouid=0 ogid=0
rdev=00:00'
hostname: 'server'
program_name: '(null)'
log: 'type=PATH msg=audit(1387218689.294:9245): item=0
name="/home/proof/prueba/" inode=475 dev=fd:00 mode=040555 ouid=0 ogid=0
rdev=00:00'
**Phase 2: Completed decoding.
decoder: 'auditd'
action: 'PATH'
id: '9245'
extra_data: '/home/proof/proof/'
**Rule debugging:
Trying rule: 1 - Generic template for all syslog rules.
*Rule 1 matched.
*Trying child rules.
Trying rule: 5500 - Grouping of the pam_unix rules.
Trying rule: 5700 - SSHD messages grouped.
Trying rule: 5600 - Grouping for the telnetd rules
Trying rule: 2100 - NFS rules grouped.
Trying rule: 2507 - OpenLDAP group.
Trying rule: 2550 - rshd messages grouped.
Trying rule: 2701 - Ignoring procmail messages.
Trying rule: 2800 - Pre-match rule for smartd.
Trying rule: 5100 - Pre-match rule for kernel messages
Trying rule: 5200 - Ignoring hpiod for producing useless logs.
Trying rule: 100302 - Reglas pertenecientes a VTS 1
Trying rule: 100303 - Reglas pertenecientes a VTS 2
Trying rule: 100311 - Evento que agrupa los logs provenientes de el
demonio AUDITD
*Rule 100311 matched.
*Trying child rules.
Trying rule: 100312 - Regla creacion de usuario prueba auditd
**Phase 3: Completed filtering (rules).
Rule id: '100311'
Level: '0'
Description: 'Evento que agrupa los logs provenientes de el demonio
AUDITD'
I have an example rule like that:
<rule id="100311" level="5">
<decoded_as>auditd</decoded_as>
<description>AUDITD RULES</description>
</rule>
in ossec.conf i have that:
<localfile>
<log_format>syslog</log_format>
<location>/var/log/audit/audit.log</location>
</localfile>
in alerts.log file:
2013 Dec 16 16:30:21 (LNKI371) 172.16.0.61->/var/log/audit/audit.log
2013 Dec 16 16:30:21 (LNKI371) 172.16.0.61->/var/log/audit/audit.log
2013 Dec 16 16:30:21 (LNKI371) 172.16.0.61->/var/log/audit/audit.log
2013 Dec 16 16:30:21 (LNKI371) 172.16.0.61->/var/log/audit/audit.log
2013 Dec 16 16:30:21 (LNKI371) 172.16.0.61->/var/log/audit/audit.log
2013 Dec 16 16:30:21 (LNKI371) 172.16.0.61->/var/log/audit/audit.log
2013 Dec 16 16:30:21 (LNKI371) 172.16.0.61->/var/log/audit/audit.log
2013 Dec 16 16:30:21 (LNKI371) 172.16.0.61->/var/log/audit/audit.log
Only that, why my example rule is not firing?
El lunes, 16 de diciembre de 2013 15:25:26 UTC-3, dan (ddpbsd) escribió:
>
> On Mon, Dec 16, 2013 at 12:52 PM, Leonel Algaré
> <[email protected]<javascript:>>
> wrote:
> > Hi guys,
> >
> >
> > Can someone tell me how i can create rules based in the auditd decoders
> that
> > i had wrote?
> >
> > My decoders:
> >
> > <decoder name="auditd">
> > <prematch>^type=</prematch>
> > </decoder>
> >
> > <decoder name="auditd-syscall">
> > <parent>auditd</parent>
> > <prematch offset="after_parent">^SYSCALL </prematch>
> > <regex offset="after_parent">^(SYSCALL)
> >
> msg=audit\(\d\d\d\d\d\d\d\d\d\d.\d\d\d:(\d+)\):\s+arch=\w+\s+syscall=\d+\s+success=(\S+)\s+exit=\S+\s+a0=\w+\s+a1=\w+\s+a2=\w+\s+a3=\w+\s+items=\d+\s+ppid=\d+\s+pid=\d+\s+auid=\d+\s+uid=\d+\s+gid=\d+\s+euid=\d+\s+suid=\d+\s+fsuid=\d+\s+egid=\d+\s+sgid=\d+\s+fsgid=\d+\s+tty=\S+\s+ses=\d+\s+comm="\S+"\s+exe="(\S+)"\s+key="(\w+)"</regex>
>
>
> > <order>system_name,id,status,action,extra_data</order>
> > </decoder>
> >
> >
> > <decoder name="auditd-cwd">
> > <parent>auditd</parent>
> > <prematch offset="after_parent">^CWD </prematch>
> > <regex offset="after_parent">^(CWD)
> > msg=audit\(\d\d\d\d\d\d\d\d\d\d.\d\d\d:(\d+)\):\s+cwd="(\.+)"</regex>
> > <order>system_name,id,extra_data</order>
> > </decoder>
> >
> > <decoder name="auditd-path">
> > <parent>auditd</parent>
> > <prematch offset="after_parent">^PATH </prematch>
> > <regex offset="after_parent">^(PATH)
> >
> msg=audit\(\d\d\d\d\d\d\d\d\d\d.\d\d\d:(\d+)\):\s+item=\d+\s+name="(\.+)"\s+inode=\d+\s+dev=\S+\s+mode=\d+\s+ouid=\d+\s+ogid=\d+\s+rdev=\S+</regex>
>
>
> > <order>action,id,extra_data</order>
> > </decoder>
> >
> >
> >
> > The multi-log feature in ossec 2.7 for auditd dont work?
> > Im having problems to correlate rules.
> >
> > Sorry for my bad english.
> >
>
>
> You need to get log samples, and write rules based on those logs. Use
> ossec-logtest to help determine what is going on and for testing.
>
> > Regards,
> >
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> >
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