Category: persistence

Introducing Slackor, a Remote Access Tool Using Slack as a C2 Channel

As a penetration tester at Coalfire Labs, I frequently use exploitation frameworks such as Metasploit or PowerShell Empire to perform post-exploitation actions on compromised endpoints. While anti-virus (AV) bypass and detection avoidance is often trivial in all but the most mature environments, detections from AV have caused me to look toward custom tooling to mitigate…


Removing Backdoors – Powershell Empire Edition

                  I’m a big fan of Powershell Empire for penetration testing.   If you haven’t heard of it, it is a post-exploitation framework which uses powershell agents to run post-exploitation scripts on a target system.  This blog post is meant to address a small subset of the…


Using email for persistence on OS X

In this post we will cover how we can use Mail.app on OS X to persist.  I was inspired by similar tools which are designed to work with Microsoft Outlook.  I first stumbled upon this article from MWR InfoSecurity, and then this blog post from Silent Break Security.  While rules in Mail.app will not replicate…