To gain visibility into what is going on at the agent side, turn on debug
mode on the agent.
In C:\Program Files (x86)\ossec-agent\internal_options.conf change:
# Windows debug (used by the windows agent)
windows.debug=0
to
# Windows debug (used by the windows agent)
windows.debug=2
and restart
In the Wazuh fork, dynamic decoders are an outstanding idea. It allows
unprecedented visualization capabilities in the security console *without*
having to resort to further parsing tricks at ingestion time. It is all
done in OSSEC.
Dynamic decoders enable unprecedented normalization of events.
Sure thing.
I am trying to implement three use cases.
1) Windows event ID: Failed object access attempt by a subject "Subject"
(tied to a real user, not a system account) of Object Type: File and
object: "C:\Users\Other-than-Subject\Whatever-else comes after.ext". Ten
recurrences by same Subje
The Windows agent is forwarding every event *twice* to the ossec server.
In debug mode 1, every event that is sent by the agent is accompanied by
the following entries in the agent log:
2017/02/26 17:29:14 ossec-agent: WARN: Could not convert SID to string
which returned (87)
2017/02/26 17:29:1
Is it possible to refer to the content of a decoded field by its field
name inside a regex in a rule?
Example: after decoding an event, we have two fields among several, field1
and field2.
The event contains:
... Field1 Label: Content_of_Field1 Field2 Label: Content_of_Field2
Field3 Label:
Wazuh fork of OSSEC is OSSEC on *massive doses of steroids*.
With ELK to visualize, all it needs on the front-end are:
i) A capable, *smart,* *flexible* rule-based correlation engine, with
*flexible* alerting capabilities; and
ii) A reporting engine (with csv/pdf export, and ad-hoc +
automat
There a more elegant way: use eventchannel instead of eventlog to collect
Windows logs.
In /var/ossec/etc/agent.conf:
Application
eventchannel
Security
eventchannel
System
eventchannel
The event contains textual descriptions of access codes in a
s
After upgrading Windows 10 to the latest version:
- Event ID 6417 is missing the event description and the field names.
2017 Feb 24 12:18:43 WinEvtLog: Security: AUDIT_SUCCESS(6417): Microsoft-
Windows-Security-Auditing: (no user): no domain: Hostname: 0x38a0 C:\Windows
\System32\wbem\WmiPrvSE.ex
I found how to run the agent in debug mode. It seems like the issue lies
with the agent, and the server is faithfully accepting whatever the agent
is sending across.
Event ID 8002 (AppLocker) from agent debug log:
2017 Feb 23 16:51:53 WinEvtLog: Microsoft-Windows-AppLocker/EXE and DLL:
INFORMAT
I tend to think that the Windows Agent is the culprit.
Can the agent be temporarily run in debug mode, so it logs locally the
events that it forwards to the server?
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The field names.
Instead of what is being collected,
2017 Feb 21 13:33:23 WinEvtLog: Security: AUDIT_SUCCESS(4627):
Microsoft-Windows-Security-Auditing: (no user): no domain: Hostname:
S-1-5-18 HOSTNAME$ DOMAIN 0x3e7
S-1-5-21-XX-XX-XX- Username HOSTNAME 0x22d8dd8
7
Here's another event missing firld names: Event ID 4627 which lists the
group membership of a user when he logs on is missing field names.
2017 Feb 21 13:33:23 WinEvtLog: Security: AUDIT_SUCCESS(4627):
Microsoft-Windows-Security-Auditing: (no user): no domain: Hostname:
S-1-5-18 HOSTNAME$ DOMAN
The event is from a Windows 10 system.
I have turned on logall. I am having a hard time regenerating event ID
5140, however I have spotted several other event types where the xml field
labels are NOT logged up by OSSEC.
As presented by OSSEC, these event types (and several others) are just a
s
The event is from a Windows 10 system.
I have turned on logall. I am having a hard time regenerating event ID
5140, however I have spotted several other event types where the xml field
labels are NOT logged up by OSSEC.
In addition, in the specific example below, the order of the last two
fiel
The events are sanitized.
*XML in Windows Event Viewer*:
- http://schemas.microsoft.com/win/2004/08/events/event";>
-
5140
1
0
12808
0
0x8020
2076547748
Security
Desktop
-
S-1-5-21-XX-XX-XX-
UserName
Windows uses a combination of tabs and spaces between fields, and between
field names and field content. There is not telling how many of each there
are.
Using \t*\s* between field name and field content has proven to be
bulletproof for me.
Example: Account Name:\t*\s*\.+\$
If the $ is follow
Difference between your setup and mine is that I am forwarding events in
CEF format, you seem to be forwarding the OSSEC multi-line format.
Can you please rerun your test with CEF format in syslog_output?
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Alerts --> Alert level has to do with the event level threshold below which
events are dropped and not placed in the alerts file.
Syslog --> Level has to do with the event level threshold below which
events are not forwarded via csyslogd to syslog receiver.
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Regardless of the syslog RFC, they all allow messages up to 1024 bytes. The
entire message is 1017 bytes.
I think csyslogd is choking on the \r\n\t\t (carriage return, line feed,
and two tabs) that precede every group SID. The event is being truncated
just before the first \r\n\t\t.
I do not k
In /var/ossec/logs/alerts/alerts.json file:
{"rule":{"level":1,"comment":"Windows - Audit Success event catch
all.","sidid":18104,"firedtimes":2,"groups":["win_audit"]},"dstuser":"(no
user)","full_log":"2016 Sep 14 17:25:27 WinEvtLog: Security:
AUDIT_SUCCESS(4627): Microsoft-Windows-Security-Au
Greetings :-)
Just got this alert, and was wondering if you could provide some specific
guidance on how to investigate (step 1, 2, etc.).
New to OSSEC.
OSSEC HIDS Notification.
2016 Mar 24 7:49:39
Received From: log->rootcheck
Rule: 510 fired (level 7) -> "Host-based anomaly detection eve
I am trying to understand the exact syntax for XPath filters in OSSEC.
All the OSSEC documentation says on the subject is the following,
System
eventchannel
Event/System[EventID=7040]
and provides a link to Microsoft's XPath documentation:
Can anyone provide detailed guidance on transla
PATH=/usr/bin:/usr/local/bin:/bin; export PATH; id;
I really appreciate your help. This is all new to me.
J~
On Thursday, March 10, 2016 at 4:36:09 AM UTC-6, dan (ddpbsd) wrote:
>
>
> On Mar 10, 2016 5:32 AM, "Johnny InfoSec" > wrote:
> >
> > Greetings,
> &g
Greetings,
As a new OSSEC user. I have found some of the alerts difficult to make
sense of. Is there any documentation (or decoder ring :-)) that helps with
this?
Trying to make sense of some of the different sections in the below alert:
OSSEC HIDS Notification.
2016 Mar 08 21:00:02
Recei
Can someone give an example of someone in large retail that is successfully
using OSSEC? We are looking at solutions for our company of over 50
stores, but I'd like to know that someone else has already tried this in a
large environment. Can anyone share links or examples?
Thanks!
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Hello,
We are looking to test this in our enterprise environment. Are there any
examples or any references to this being used on point of sale devices
within large size companies?
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