Work

Conducting a Cloud Assessment in AWS

I’ve been engaged in a lot of merger & acquisition (M&A) activity over the past year. One of the things that entails is understanding how organizations are using AWS, what controls they have in place and how they are using AWS’s security features. This a general list of things you want to look at when evaluating an AWS environment for the first time. Security & Governance Tooling CloudTrail Is CloudTrail enabled?

Adventures in Cloud Inventory

The Origin Story This adventure began, like most do, with wizard crashing a party: Turns out, Jerry had been doing some open-bucket discovery and found several with the patten of letters “cnn”. At the time we had somewhere around 80 AWS accounts and our financial tool didn’t seem to find any hits. As we’d been building out the concept of the Security Account we had the ability to go cross-account to list all the buckets, so I wrote a small script to do just that.

Multi-Account, Multi-Payer Strategy for 2020

Much has been written about establishing a multi-account strategy. From the Code Spaces incident onward, putting all your AWS eggs in a single basket has been an design choice AWS and most cloud and cloud security professionals have spoken against. As of writing this, my current employer has 830+ AWS accounts. That’s not at the extreme end (I recall hearing at re:Invent that Fidelity has over 10,000), but it is certainly beyond the “we can do this by hand” stage of cloud maturity.

SEC339 - Actionable threat hunting in AWS

This post is contains all the queries from my talk SEC339 at re:Invent 2019. Yes, it is very similar to the talk I gave at re:Inforce. The focus is on the Preparation & Identification aspects of the SANS Incident Response framework. Preparation The tools we need here are: Centralized CloudTrail Centralized GuardDuty Antiope Splunk. CloudTrail We centralize all our CloudTrail events from all our accounts into a single bucket.

Threat Hunting with CloudTrail and GuardDuty in Splunk

This post is the reference section of my dev-chat at the first ever AWS re:Inforce conference in Boston. You can find my slides here. The purpose was to give the audience a brief overview of how to conduct basic threat hunting in their CloudTrail and GuardDuty. We throw in a bit of Vulnerability Hunting and awareness with Antiope at the end. Tools The tools we need here are: Centralized CloudTrail Centralized GuardDuty Antiope Splunk.

Threat Hunting with Antiope

(This article was drafted on the plane to the SANS Cloud Security Summit but I never got around to publishing it. I dive deeper into the ThreatHunting topic for my DevChat at AWS re:Inforce to be published June 26th) One the purposes for Antiope is to provide a platform for Cloud Threat Hunting. Traditional Threat Hunting looks for evidence of compromise. In this case what we’re really hunting are threats from misconfiguration.

Introducing cftdeploy

Back in November of 2015 I taught myself CloudFormation on the Amtrak ride from DC to NY. As I was building out my ultimate VPC template, I began to discover the limitations of CloudFormation. There was no clean way to link the output of a stack to the inputs of another stack. All the examples I’d seen at work had all the settings defined as defaults. Meaning that sharing CFTs was a risky proposition and code-reuse was very limited.

Creating a Cloud Security Standard

I’ve written here in the past about how I’ve created Cloud Security Scorecards to help our account holders fix security issues and to help management hold the account holders accountable for their security posture. Today I’m going to discuss the Cloud Security Standards against which we measure our cloud accounts. Our first major decision was not to have a single standard for the three public clouds we operate in. The differences between AWS, GCP and Azure are major, and creating a document that addressed configuration in the abstract would create confusion.

Top 10 Cloud Security Risks

Towards the end of the year I read a top-10 list of cloud security threats for 2019 and it had me thinking about the Cloud Security risks that people are not talking about. I can’t find that original list, and I’ve been sitting on this post for the last two months. So with out further ado, here is my take on cloud security risks you’re not reading about in the press.

Recent AWS Security Launches

This post came out of a need for me to review my Cloud Security Standards after re:Invent. I knew of the re:Invent announcements, I didn’t recall all the other things that have happened recently. Drop me a tweet, LinkedIn or email if this is useful and I should do this again in a few months. This list is sorted chronologically and categorized as good, bad and ugly. The Good Amazon GuardDuty Optimizes AWS CloudTrail Analysis Reducing Cost for Customers Announced On: Nov 1, 2018