IBM QRadar via Logstash¶
Example overview¶
Webhooks can be used as system log sources. The number of log sources depends on the system complexity: the more components in the system, the greater number of log sources and logs. The most common logging scheme in complex systems consists of the following components:
-
Log collector: accepts logs from several sources and forwards logs to the SIEM system
-
SIEM system: used to analyze logs and monitor the system status
In the provided example, events are sent via webhooks to the Logstash log collector and forwarded to the QRadar SIEM system.
Used resources¶
-
Logstash 7.7.0 installed on Debian 10.4 (Buster) and available on
https://logstash.example.domain.com
-
QRadar V7.3.3 installed on Linux Red Hat and available with the IP address
https://109.111.35.11:514
-
Administrator access to Wallarm Console in EU cloud to configure the webhook integration
Logstash configuration¶
Logstash is configured in the logstash-sample.conf
file:
-
Incoming webhook processing is configured in the
input
section:- All HTTP and HTTPS traffic is sent to 5044 Logstash port
- SSL certificate for HTTPS connection is located within the file
/etc/pki/ca.pem
-
Forwarding logs to QRadar and log output are configured in the
output
section:- All event logs are forwarded from Logstash to QRadar at the IP address
https://109.111.35.11:514
- Logs are forwarded from Logstash to QRadar in the JSON format according to the Syslog standard
- Connection with QRadar is established via TCP
- Logstash logs are additionally printed on the command line (15 code line). The setting is used to verify that events are logged via Logstash
- All event logs are forwarded from Logstash to QRadar at the IP address
input {
http { # input plugin for HTTP and HTTPS traffic
port => 5044 # port for incoming requests
ssl => true # HTTPS traffic processing
ssl_certificate => "/etc/pki/ca.pem" # certificate for HTTPS connection
}
}
output {
syslog { # output plugin to forward logs from Logstash via Syslog
host => "109.111.35.11" # IP address to forward logs to
port => "514" # port to forward logs to
protocol => "tcp" # connection protocol
codec => json # format of forwarded logs
}
stdout {} # output plugin to print Logstash logs on the command line
}
A more detailed description of the configuration files is available in the official Logstash documentation.
Testing Logstash configuration
To check that Logstash logs are created and forwarded to QRadar, the POST request can be sent to Logstash.
Request example:
curl -X POST 'https://logstash.example.domain.com' -H "Content-Type: application/json" -d '{"key1":"value1", "key2":"value2"}'
Logstash logs:
QRadar logs:
QRadar log payload:
QRadar configuration (optional)¶
In QRadar, the log source is configured. It helps to easily find Logstash logs in the list of all logs in QRadar, and can also be used for further log filtering. The log source is configured as follows:
-
Log Source Name:
Logstash
-
Log Source Description:
Logs from Logstash
-
Log Source Type: type of incoming logs parser used with Syslog standard
Universal LEEF
-
Protocol Configuration: standard of logs forwarding
Syslog
-
Log Source Identifier: Logstash IP address
-
Other default settings
A more detailed description of the QRadar log source setup is available in the official IBM documentation.
Configuration of webhook integration¶
-
Webhooks are sent to
https://logstash.example.domain.com
-
Webhooks are sent via POST requests
-
Additional authentication parameter
X-Auth-Token
is passed in the request -
Webhooks sent to Webhook URLs are all available events: hits, system events, vulnerabilities, scope changes
Example testing¶
To test the configuration, a new user is added in Wallarm Console:
Logstash will log the event as follows:
The following data in JSON format will be displayed in the QRadar log payload: