Tryhackme Sql Injection Lab Answers -

TryHackMe SQL Injection Lab — Complete Walkthrough and Answers

This article summarizes the TryHackMe "SQL Injection Lab" room, explaining each challenge, exploitation approach, and the payloads/flags used to solve them. Use this as a learning reference to understand common SQLi techniques (in-band UNION, error-based, boolean blind, POST/GET injection, UPDATE exploitation) — not to attack real systems.

Challenge 2: Union-Based SQL Injection

• Task: Find the number of columns.
• Steps:
  1. Use the following payload to determine the number of columns: ' UNION SELECT NULL -- -
  2. Analyze the response and adjust the payload accordingly.
  3. Repeat step 2 until you find the correct number of columns.

Answer: 4

• Explanation: The payload ' UNION SELECT NULL -- - injects a malicious SQL query that selects a null value. By analyzing the response and adjusting the payload, we determine that there are 4 columns.

Step 4: Dumping Table Data

To dump table data, we can use the following payload: tryhackme sql injection lab answers

' UNION SELECT * FROM employees --

This payload will return all employee data.

Solution

1. Step 1: Use the following payload to find the table name: ' UNION SELECT NULL,NULL -- - TryHackMe SQL Injection Lab — Complete Walkthrough and

   • The response will contain an error message indicating the number of columns.

2. Step 2: Use the following payload to find the table name: ' UNION SELECT NULL,NULL,NULL -- -

   • The response will indicate which column contains data.

3. Step 3: Use a SQL comment to filter results. Task: Find the number of columns

   • Inject the following payload: ' UNION SELECT NULL,table_name,NULL FROM information_schema.tables -- -

4. Step 4: Analyze the response and extract the table name.

   • The table name is users.

Challenge 4: Blind SQL Injection

• Task: Find the username and password.
• Steps:
  1. Use the following payload to inject a time-based blind SQL injection: ' AND SLEEP(5) -- -
  2. Analyze the response and identify the username and password.

Answer: admin : password123

• Explanation: The payload ' AND SLEEP(5) -- - injects a time-based blind SQL injection that reveals the username and password.

Lab Overview

The TryHackMe SQL Injection Lab is a virtual lab environment where users can practice SQL injection attacks in a safe and controlled manner. The lab consists of a vulnerable web application that uses a MySQL database.