While performing a routine internal penetration test, I began the assessment by running Responder in analyze mode just to get an idea of what was being sent over broadcast. Much to my surprise, I found that shortly after running it, a hash was captured by Responder’s SMB listener.

This hash belonged to an account named “panagent,” which I assumed to mean PAN (Palo Alto Networks) agent. I threw the hash into Hashcat and shortly thereafter I was able to recover the plaintext password. Using CrackMapExec, I sprayed these credentials against internal systems within the local network and found that they had administrator access on multiple hosts within the environment.

After gaining admin access on these systems, I performed what is known as the “credential shuffle” until I compromised the credentials for an account within the “Domain Admins” group. So, what happened?

Read the full article posted on the Coalfire Labs blog: The Dangers of Client Probing on Palo Alto Firewalls