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Question 79 - PT0-003 discussion

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While performing an internal assessment, a tester uses the following command:

crackmapexec smb 192.168.1.0/24 -u user.txt -p Summer123@

Which of the following is the main purpose of the command?

A.
To perform a pass-the-hash attack over multiple endpoints within the internal network
Answers
A.
To perform a pass-the-hash attack over multiple endpoints within the internal network
B.
To perform common protocol scanning within the internal network
Answers
B.
To perform common protocol scanning within the internal network
C.
To perform password spraying on internal systems
Answers
C.
To perform password spraying on internal systems
D.
To execute a command in multiple endpoints at the same time
Answers
D.
To execute a command in multiple endpoints at the same time
Suggested answer: C

Explanation:

The command crackmapexec smb 192.168.1.0/24 -u user.txt -p Summer123@ is used to perform password spraying on internal systems. CrackMapExec (CME) is a post-exploitation tool that helps automate the process of assessing large Active Directory networks. It supports multiple protocols, including SMB, and can perform various actions like password spraying, command execution, and more.

CrackMapExec:

CrackMapExec: A versatile tool designed for pentesters to facilitate the assessment of large Active Directory networks. It supports various protocols such as SMB, WinRM, and LDAP.

Purpose: Commonly used for tasks like password spraying, credential validation, and command execution.

Command Breakdown:

crackmapexec smb: Specifies the protocol to use, in this case, SMB (Server Message Block), which is commonly used for file sharing and communication between nodes in a network.

192.168.1.0/24: The target IP range, indicating a subnet scan across all IP addresses in the range.

-u user.txt: Specifies the file containing the list of usernames to be used for the attack.

-p Summer123@: Specifies the password to be used for all usernames in the user.txt file.

Password Spraying:

Definition: A technique where a single password (or a small number of passwords) is tried against a large number of usernames to avoid account lockouts that occur when brute-forcing a single account.

Goal: To find valid username-password combinations without triggering account lockout mechanisms.

Pentest

Reference:

Password Spraying: An effective method for gaining initial access during penetration tests, particularly against organizations that have weak password policies or commonly used passwords.

CrackMapExec: Widely used in penetration testing for its ability to automate and streamline the process of credential validation and exploitation across large networks.

By using the specified command, the tester performs a password spraying attack, attempting to log in with a common password across multiple usernames, identifying potential weak accounts.

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asked 02/10/2024
Francesco Mammola
41 questions
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