Cisco Safe Firewall Integration with Amazon Safety Lake

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Cisco is a accomplice of the Amazon Safety Lake, supporting the Open Cybersecurity Schema Framework

At AWS re:Invent 2022, Cisco was proud to be a launch accomplice for Amazon Safety Lake, a brand new AWS service that robotically centralizes a corporation’s safety information from cloud, on-premises, and customized sources right into a purpose-built information lake saved in a buyer’s account. With assist for the Open Cybersecurity Schema Framework (OCSF) normal, the service can normalize and mix safety information from AWS and a broad vary of enterprise safety information sources. Amazon Safety Lake helps you analyze safety information, so you may get a extra full understanding of your safety posture throughout your entire group.

As a part of the Cisco Safe Technical Alliance, I had the chance to construct the Cisco Safe Firewall

integration into Amazon Safety Lake for the general public preview. With the final availability of Amazon Safety Lake, I up to date the assist of OSCF and validated the mixing.

Should you’ve by no means labored with Safe Firewall or eNcore, here’s a abstract:

Safe Firewall serves as a corporation’s centralized supply of safety info. It makes use of superior menace detection to flag and act on malicious ingress, egress, and east-west visitors whereas its logging capabilities retailer info on occasions, threats, and anomalies. By integrating Safe Firewall with Amazon Safety Lake, by way of Safe Firewall Administration Heart, organizations will have the ability to retailer firewall logs in a structured and scalable method.

What’s the eNcore Shopper

The eNcore shopper offers a option to faucet into message-oriented protocol to stream occasions and host profile info from the Cisco Safe Firewall Administration Heart. The eNcore shopper can request occasion and host profile information from a Administration Heart, and intrusion occasion information solely from a managed gadget.  The eNcore utility initiates the info stream by submitting request messages, which specify the info to be despatched, after which controls the message move from the Administration Heart or managed gadget after streaming begins.

With eNcore you may entry to full checklist of firewall occasion varieties and medata data, together with packet data, safety intelligence occasions, enhanced intrusion information, legacy occasions and extra.  In whole over 1000+ data varieties are supported by eStreamer, going again to inception of the Safe Firewall.  Extra particulars may be discovered within the full eStreamer specification.

eNcore runs on Python 3.6+ and helps Firepower Administration Heart model 6.0 and above, for extra particulars on the eNcore shopper please see our operations information.

What’s New with the Basic Availability?

With the Amazon Safety Lake launch, I enhanced the Cloud Formation deployment script for the eNcore shopper to automate extra options and make the set up course of simpler. Moreover, a consumer interface has been added for the eNcore shopper to handle and monitor firewall logs out and in of the Amazon Safety Lake . The Community Exercise OCSF schema mappings have been fine-tuned to match fields to the right class construction definition and assist has been added for added firewall occasion varieties, together with malware and intrusion occasions.

The Objective: Present Adaptable Framework to Evolve with OCSF 

Normalization:

The OCSF normal goals to offer a typical illustration of nested information constructions of safety information throughout all sources, distributors and purposes. You could find an interactive schema that lets you drill down into the OCSF class constructions and information definitions.

Cisco launched an up to date model of the eNcore shopper that may stream firewall logs to a number of locations. The replace offers assist for changing the logs into OCSF format. The Firewall information is represented within the Community Exercise occasions class and the logs are mapped to the varied attributes and information varieties below that class.

This integration builds a conveyable framework within the eNcore shopper that helps decode Safe Firewall information, interprets it into key worth pair information units based mostly on Python courses that mirror the OCSF framework offering transformations that adapt Safe Firewall logs to Community Exercise occasions.  Briefly, eNcore is the glue that maps uncooked Cisco Safe Firewall occasions right into a concise consumable format for the Amazon Safety Knowledge Lake.

Validating OCSF Compliance

OCSF compliance was validated utilizing instruments offered by the OCSF schema such because the OCSF swagger API.

This API will assist decide if information suits the OCSF schema and its object hierarchy. It’s accessible below the OCSF server venture and is continutely up to date to assist new information varieties and constructs, as of this writing the eNcore shopper helps the event model (v0.0.0) of the OCSF schema. Occasions from safe firewall are modeled in opposition to the Community Exercise class construction, by executing the /api/courses/NETWORK_ACTIVITY URI we will validate output in actual time to find out if the output construction matches the newest OCSF normal.

The Design

The eNcore shopper offers a option to faucet into message-oriented protocol to stream occasions and host profile info from the Cisco Safe Firewall Administration Heart. The eNcore shopper can request occasion and host profile information from a Administration Heart, and intrusion occasion information solely from a managed gadget. The eNcore utility initiates the info stream by submitting request messages, which specify the info to be despatched, after which controls the message move from the Administration Heart or managed gadget after streaming begins.

These messages are mapped to OCSF Community Exercise occasions utilizing a collection of transformations embedded within the eNcore code base, performing as each creator and mapper personas within the OCSF schema workflow. As soon as validated with an inside OCSF schema, the messages are then written to 2 sources: first, a neighborhood JSON formatted file in a configurable listing path, and second, compressed parquet information partitioned by occasion hour within the S3 Amazon Safety Lake supply bucket. The S3 directories containing the formatted log are crawled hourly and the outcomes are saved in an Amazon Safety Lake database. From there we will get a visible of the schema definitions extracted by the AWS Glue Crawler, establish fieldnames, information varieties, and different metadata related along with your Community Exercise occasions. Occasion logs can be queried utilizing Amazon Athena to visualise log information.

Get Began

To make the most of the eNcore shopper with Amazon Safety Lake, first go to the Cisco public GitHub repository for Firepower eNcore, OCSF department.

Obtain and run the cloud formation script eNcoreCloudFormation.yaml.

The Cloud Formation script will immediate for added fields wanted within the creation course of, they’re as follows:

Cidr Block:  IP Handle vary for the provisioned shopper, defaults to the vary proven beneath

Occasion Kind:  The ec2 occasion dimension, defaults to t4.giant

KeyName  A pem key file that can allow entry to the occasion

AmazonSecurityLakeBucketForCiscoURI: The S3 location of your Knowledge Lake S3 container.

FMC IP: IP or Area Title of the Cisco Safe Firewall Administration Portal

After the Cloud Formation setup is full, it could possibly take anyplace from 3-5 minutes to provision assets in your surroundings. The cloud formation console offers an in depth view of all of the assets generated from the cloud formation script, as proven beneath.

As soon as the ec2 occasion for the eNcore shopper is prepared, we have to enable checklist the shopper IP handle in our Safe Firewall Server and generate a certificates file for safe endpoint communication.

Steps:

  1. Within the Safe Firewall Dashboard, navigate to Search->eStreamer, to search out the enable checklist of Shopper IP Addresses which are permitted to obtain information.
  2. Click on Add and provide the Shopper IP Handle that was provisioned for our ec2 occasion.
  3. Additionally, you will be requested to produce a password, click on Save to create a safe certificates file on your new ec2 occasion.

4. Obtain the Safe Certificates you simply created and duplicate it to the /eNcore listing in your ec2 occasion. Or add utilizing the eNcore GUI which is detailed within the subsequent part.

eNcore GUI

Now that we have now the certificates, we will use the eNcore GUI to add to the certificates, that is the brand new piece that we’ve added because the public preview again in December 2022. Customers can now management and configuration connectivity to the Firepower Administration Console (FMC) in a central location, versus putting in and working advanced command line scripts. Though system directors and energy customers are greater than welcome to nonetheless use that methodology.

To entry the eNcore GUI navigate to <Your EC2 Occasion IP Handle> – on this case http://52[.]207.21.3:8184. On this instance we run a safe SSL tunnel with port forwarding utilizing the AWS pem file to redirect visitors from our ec2 occasion to our native host, relying your organizations community safety posture you might be able to entry the eNcore GUI immediately with out a SSL tunnel.  Port info may be substituted with any free port on native system, for extra particulars on find out how to route ec2 cases to your localhost please see the AWS documentation.

ssh -i eNcore-ubuntu.pem -N -L 8141:ec2-52-207-21-3.compute-1.amazonaws.com:3000 ubuntu@ec2-52-207-21-3.compute-1.amazonaws.com

Click on on the Configuration part to see a top level view of the steps wanted to execute the eNcore streaming course of. Since we used the AWS Cloud Formation Script, the primary two steps have already been accomplished as proven within the image above.  Subsequent, we will add the certificates file and supply the password within the discipline. This may create a key and cert file that can be used to safe communication between the FMC and the EC2 occasion with the eNcore shopper.

Now that we have now our communication established, we will ship information to Amazon Safety Lake.  Click on on SEIM Integrations  AWS Knowledge Lake hyperlink to see the lively connections. You will note a listing populated with the FMC we laid out in our cloud formation script. Click on the Begin button to provoke information streaming.

This may start the info relay and ingestion course of. We are able to then navigate to the S3 Amazon Safety Lake bucket we configured earlier to see OCSF compliant logs formatted in gzip parquet information in a time-based listing construction.

We are able to confirm this by heading again to our AWS Knowledge Lake repository to view the outcomes.  As we will see within the display beneath we have now new folders that conform to the partitioning required by the Amazon Safety Knowledge Lake.  The information we configured earlier within the Cloud Formation script creates partitioning that allow the AWS Crawler to effectively devour and course of occasion information and tie to again to our customized information supply we outlined earlier, CISCOFIREWALL.

Occasion information is positioned into S3 buckets by occasion time, will rotate file creation based mostly on the scale with a maximium file dimension of 256MB.   The information are named in accordance the time which the final occasion was processed offering a primary hand have a look at how far lengthy the eNcore shopper is within the information streaming course of.

Amazon Safety Lake then runs a crawler job each hour, to parse and devour the logs information within the goal s3 listing, after which we will view the ends in Athena Question.  With Amazon Athena we will visible analytics in number of totally different software together with Amazon Grafana and Quicksight, sooner or later we plan to construct visualizations to showcase Firewall within the AWS Safety Lake.

Extra info on find out how to configure and tune the eNcore eStreamer shopper may be discovered on our official web site. This contains particulars on find out how to filter sure occasion varieties to focus your information retention coverage, and pointers for efficiency and different detailed configuration settings.

You possibly can take a look at the Amazon Person Information for extra info. I encourage you to try OCSF your self and see the way it may assist the neighborhood within the quest for normalization.


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