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PT0-001 · Question #114

In a physical penetration testing scenario, the penetration tester obtains physical access to a laptop following as a potential NEXT step to extract credentials from the device?

The correct answer is D. Conduct LLMNR/NETBIOS-ns poisoning. After gaining physical access to a laptop on a corporate network, LLMNR/NBT-NS poisoning is a highly effective technique to capture credential hashes from other networked hosts.

Post-exploitation and lateral movement

Question

In a physical penetration testing scenario, the penetration tester obtains physical access to a laptop following as a potential NEXT step to extract credentials from the device?

Options

  • ABrute force the user's password.
  • BPerform an ARP spoofing attack.
  • CLeverage the BeEF framework to capture credentials.
  • DConduct LLMNR/NETBIOS-ns poisoning.

How the community answered

(32 responses)
  • A
    3% (1)
  • B
    3% (1)
  • C
    13% (4)
  • D
    81% (26)

Why each option

After gaining physical access to a laptop on a corporate network, LLMNR/NBT-NS poisoning is a highly effective technique to capture credential hashes from other networked hosts.

ABrute force the user's password.

Brute forcing the local user password is slow, noisy, and often blocked by account lockout policies, making it far less efficient than passive credential capture over the network.

BPerform an ARP spoofing attack.

ARP spoofing is a network man-in-the-middle technique that intercepts traffic between hosts but does not directly extract stored credentials from a device.

CLeverage the BeEF framework to capture credentials.

BeEF (Browser Exploitation Framework) targets web browsers via JavaScript hooks and requires a victim to visit a malicious page, making it irrelevant to extracting credentials from a physically accessed laptop.

DConduct LLMNR/NETBIOS-ns poisoning.Correct

With physical access to a machine on the internal network, a tester can run a tool like Responder to poison LLMNR and NBT-NS broadcast requests, causing other hosts to authenticate to the attacker's machine and revealing NTLMv2 credential hashes. This works passively and does not require compromising the target laptop's OS directly. The captured hashes can then be cracked or relayed for further access.

Concept tested: LLMNR/NBT-NS poisoning for credential capture

Source: https://attack.mitre.org/techniques/T1557/001/

Topics

#physical access#LLMNR poisoning#credential extraction#post-exploitation

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