NetSPI Blog

Scott Sutherland
March 24th, 2020

Linux Hacking Case Studies Part 2: NFS

This blog will walk through how to attack insecure NFS exports and setuid configurations in order to gain a root shell on a Linux system.

Scott Sutherland
March 23rd, 2020

Linux Hacking Case Studies Part 1: Rsync

This blog will walk through how to attack insecure Rsync configurations in order to gain a root shell on a Linux system.

Ian Williams
March 18th, 2020

Gaining AWS Console Access via API Keys

For adversarial scenarios, AWS console access is better than the APIs. We’ll walk you through our research process here, and release a new tool we’ve built! When there’s a will… We’re frequently asked by clients to test applications, networks and/or infrastructure hosted on Amazon Web Services (AWS). As a part of these assessments, we’ll oftentimes […]

Karl Fosaaen
February 20th, 2020

Azure Privilege Escalation Using Managed Identities

Azure Managed Identities are Azure AD objects that allow Azure virtual machines to act as users in an Azure subscription. While this may sound like a bad idea, AWS utilizes IAM instance profiles for EC2 and Lambda execution roles to accomplish very similar results, so it’s not an uncommon practice across cloud providers. In my […]

Jake Karnes
February 13th, 2020

Attacking Azure with Custom Script Extensions

PowerShell and Bash scripts are excellent tools for automating simple or repetitive tasks. Azure values this and provides several mechanisms for remotely running scripts and commands in virtual machines (VMs). While there are many practical, safe uses of these Azure features, they can also be used maliciously. In this post we’ll explore how the Custom […]

Karl Fosaaen
December 10th, 2019

Azure Privilege Escalation via Cloud Shell

TLDR; By default, Azure Subscription Contributors have access to all storage accounts in a subscription. These storage accounts can contain Azure Cloud Shell storage files (Linux home directories) that can contain sensitive information. By modifying these Cloud Shell files, an attacker can execute commands in the Cloud Shell sessions of other users. This can lead […]

Scott Sutherland
November 18th, 2019

Analyzing DNS TXT Records to Fingerprint Online Service Providers

In this blog I’ll share a process/script that can be used to identify online service providers used by a target company through domain validation tokens stored in DNS TXT records.

Scott Sutherland
November 11th, 2019

Exploiting SQL Server Global Temporary Table Race Conditions

This blog will walk through how to find and exploit SQL Server global temporary table race conditions to gain unauthorized access to data and execute code.