This document discusses data sources in AlienVault OSSIM. There are two types of data source connectors: detectors, which provide event data from systems like firewalls and antivirus software, and monitors, which provide indicators from tools like Ntop and Nmap. It describes how OSSIM normalizes data through plugins and rules to extract fields from raw logs and events. The document provides a practical exercise on adding SSH logs to OSSIM and connecting a Windows machine via OSSEC. It encourages using the collected data in a SIEM for security information and event management rather than just logging.

1. AlienVault Data Sources
OSSIM Made Simple Webinar Series
Joe Schreiber
Solutions Architect

2. A Note About Data…
New Analyst
SIEM
Logs, Events...

3. Two Types of DS Connectors
DETECTORS: They offer events (Snort, Firewalls,
Antivirus, Web servers, OS events..)
MONITORS: They offer indicators (Ntop, Tcptrack,
Nmap...)

4. Collection and Flow
What methods can we use to retrieve data
?

5. Normalization
...or why do we do this?
plugin_id=4003 plugin_sid=2
username=root date="1295472603"
Authentication Failed for user root from src_ip=192.168.2.2
192.168.2.2 12.02.2009 12:02:21
DROP 192.168.1.1 21.2.2.2
Dec 02 2009 12:02:21
plugin_id=4503 plugin_sid=21
date="1295472603" src_ip=192.168.1.1
dst_ip=21.2.2.2

6. Plugins
Rules
Rules define the format of each event and how they
are normalized
It is composed by a regular expression and the list
of fields that the event will include when once it is
sent to the AlienVault SIEM or Logger
In some cases only one regular expression will
collect every event coming from one application, in
some other cases more than one rule will be
required

7. Practical Exercise
Adding SSH logs to OSSIM

8. Practical Exercise
Adding a Windows Machine to OSSIM via
OSSEC
+

9. Tips and Tricks
Tools you can use
Network
• tcpdump, ngrep, etc..
Application
• logger
Log files to consult
Agent logs

10. We Have Events!
So what?
This is a SIEM not a
logger - we can do
more!
What can you do
with all this data?

11. Questions?

12. Want more?
Attend OSSIM Made Simple