Amazon CloudWatch Logs Integration

Juan Romero

06-Nov-2025

Amazon CloudWatch Logs

AWS CloudWatch Logs is a service that allows the users to centralize the logs from all their systems, applications, and AWS services in a single place. To understand how Cloudwatch Logs works it is important to learn about the following concepts:

• Log events: CloudWatch saves the logs generated by the application or resource being monitored as log events. A log event is a record with two properties: the timestamp when the event occurred and the raw log message.

• Log streams: Log events are stored in log streams. A log stream represents a sequence of events coming from the application instance or resource being monitored. All log events in a log stream share the same source.

• Log groups: Log streams are grouped using log groups. A log group defines a group of log streams that share retention, monitoring, and access control settings.

Create a policy using the Amazon Web Services console.

Take into account that the policies below follow the principle of least privilege to ensure that only the minimum permissions are provided to the AWS IAM user.

To allow an AWS user to use the Wazuh module for AWS with read-only permissions, it must have a policy like the following attached:

{
 "Version": "2012-10-17",
 "Statement": [
 {
 "Sid": "VisualEditor0",
 "Effect": "Allow",
 "Action": "logs:DescribeLogStreams",
 "Resource": "arn:aws:logs:::log-group::*"
 },
 {
 "Sid": "VisualEditor1",
 "Effect": "Allow",
 "Action": "logs:GetLogEvents",
 "Resource": "arn:aws:logs:::log-group::log-stream:"
 }
 ]
}

If it is necessary to delete the log files once they have been collected, the associated policy would be as follows:

{
 "Version": "2012-10-17",
 "Statement": [
 {
 "Sid": "VisualEditor0",
 "Effect": "Allow",
 "Action": "logs:DescribeLogStreams",
 "Resource": "arn:aws:logs:::log-group::*"
 },
 {
 "Sid": "VisualEditor1",
 "Effect": "Allow",
 "Action": [
 "logs:GetLogEvents",
 "logs:DeleteLogStream"
 ],
 "Resource": "arn:aws:logs:::log-group::log-stream:"
 }
 ]
}

After creating a policy, you can attach it directly to a user or to a group to which the user belongs. 

After completing the configuration in AWS, please upload a txt file to Onehub with the following information:

• aws_access_key_id,
• aws_secret_access_key
• AWS REGION
• LOG_GROUP_NAME
• LOG_STREAM_NAME