7MS #405: Tales of Internal Pentest Pwnage - Part 16

7 Minute Security

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Today's episode of pentest pwnage is the (hopefully) exciting conclusion to this episode. Last we left this pentest, we ran into some excellent blue team defenses, including:

• MFA on internal servers (which we bypassed)
• Strong passwords
• Limited vulnerable protocols (LLMNR/Netbios/etc) available to abuse for cred-capturing
• Servers that were heavily firewalled off from talking SMB to just any ol' subnet nor the Interwebs (here's a great video on how to fine-tune your software firewall chops)

In today's episode we talk about:

• How maybe it's not a good idea to make computer go completely "shields down" during pentests

• Being careful not to fat-finger anything when you spawn cmd.exe with creds, like

runas /netonly /user:samplecompany\billybob "C:\windows\system32\cmd.exe"

• Being careful not to fat-finger anything when using CrackMapExec

• How fundamental and really effective blue team controls (such as the ones mentioned above) can really make pentesting a headache!

• How you should be careful when spawning shells with MultiRelay (part of Responder is it creates new services on your victim machine

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