Step 1: Payload Delivery: The attacker identifies an input field (e.g., username, password, search box) in the web application.
Step 2: Crafting the Payload: The attacker constructs a malicious SQL injection payload designed to achieve a specific goal (e.g., bypass authentication, retrieve data, execute commands). This payload includes SQL commands like SELECT, INSERT, UPDATE, DELETE, and potentially operating system commands if the database allows it.
Step 3: Payload Injection: The attacker submits the crafted payload through the identified input field.
Step 4: Query Execution: The vulnerable application receives the input, incorporates it into an SQL query without proper sanitization, and executes the query against the database.
Step 5: Exploitation: The database interprets the injected SQL code, executes the attacker's commands, and returns the results. The attacker can then use the results to achieve their objectives, such as gaining unauthorized access or extracting sensitive information.
Step 6: Post-Exploitation: The attacker may attempt to escalate privileges, maintain persistence, or exfiltrate data depending on the database configuration and the attacker's goals.