312-50V12 · Question #77
Attacker Simon targeted the communication network of an organization and disabled the security controls of NetNTLMv1 by modifying the values of LMCompatibilityLevel, NTLMMinClientSec, and RestrictSend
The correct answer is D. Internal monologue attack. Simon performed an Internal Monologue attack by downgrading NTLM security settings and extracting NTLM hashes from process tokens without touching LSASS, allowing him to impersonate users.
Question
Options
- ACombinator attack
- BDictionary attack
- CRainbow table attack
- DInternal monologue attack
How the community answered
(50 responses)- A14% (7)
- B32% (16)
- C6% (3)
- D48% (24)
Why each option
Simon performed an Internal Monologue attack by downgrading NTLM security settings and extracting NTLM hashes from process tokens without touching LSASS, allowing him to impersonate users.
A Combinator attack is a password-cracking technique that combines words from two or more wordlists to generate candidate passwords, and has no relation to manipulating NTLM security registry settings or token extraction.
A Dictionary attack uses a predefined list of words or phrases to guess passwords through brute-force matching, and does not involve modifying NTLM configuration or extracting tokens from active processes.
A Rainbow table attack uses precomputed hash-to-plaintext tables to reverse cryptographic hashes offline, and does not involve downgrading NTLM security controls or harvesting tokens from running processes.
An Internal Monologue attack specifically involves manipulating LMCompatibilityLevel, NTLMMinClientSec, and RestrictSendingNTLMTraffic registry values to force NetNTLMv1 responses, then invoking SSPI's AcquireCredentialsHandle/InitializeSecurityContext locally to retrieve NTLM hashes from non-network logon tokens of active processes. This avoids interacting with LSASS memory directly, making it stealthier than Mimikatz-style attacks. The extracted hashes can then be used in pass-the-hash or offline cracking to masquerade as legitimate users.
Concept tested: Internal Monologue attack using NTLM downgrade and token extraction
Source: https://github.com/eladshamir/Internal-Monologue
Topics
Community Discussion
No community discussion yet for this question.