Updated README.md with more detail

README.md

@@ -2,3 +2,39 @@
 Collection of resources related to security benchmark frameworks.
 Currently covered frameworks:
 - CIS Amazon Web Services Foundations Benchmark 1.1
+
+Contents:
+
+aws-security-benchmark/ <br/>
+├── LICENSE <br/>
+├── README.md <br/>
+├── architecture <br/>
+│   ├── README.md <br/>
+│   ├── assets <br/>
+│   │   └── cis-benchmark-architecture.jpg <br/>
+│   ├── cis-benchmark-matrix.xlsx <br/>
+│   ├── create-benchmark-rules.yaml <br/>
+└── aws_cis_foundation_framework <br/>
+    ├── CIS_Amazon_Web_Services_Foundations_Benchmark_v1.1.0.pdf <br/>
+    ├── README.md <br/>
+    ├── aws-cis-foundation-benchmark-checklist-lambdarole.json <br/>
+    └── aws-cis-foundation-benchmark-checklist.py <br/>
+
+There are two parts of this package.
+
+1. CloudFormation template to configure AWS Config, Amazon CloudWatch to analyse against the CIS benchmarks and AWS Lambda to respond. Located under the architecture directory
+2. Python script to run all of the CIS Benchmark checks from the command line and output the results to an HTML file. Located under the aws_cis_foundation_framework directory
+
+See the REAMDME.md files for the install instructions for each part.
+
+Prerequisites for part 1 (automated benchmarking):
+
+1. AWS Config must be running in the region where this template will be run. This is needed for Config Rules.
+2. Amazon CloudTrail must be delivering logs to CloudWatch Logs. This is needed for CloudWatch metrics and alarms.
+3. AWS Lambda must be supported in the region where this template will be launched. See [this](https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services/) page for region support.
+
+Prerequisites for part 2 (python script)
+
+1. Python version 2.7
+2. Configured AWS CLI
+3. IAM permissions as defined in (aws-cis-foundation-benchmark-checklist-lambdarole.json)