200'XOR(20*if(now()=sysdate(),sleep(15),0))XOR'Z

Answer 1

The string you've provided appears to be a SQL injection payload. SQL injection is a code injection technique that exploits a vulnerability in an application's software by manipulating SQL queries. The payload you've shown seems to be designed for exploiting a time-based blind SQL injection vulnerability.

Here's a breakdown of the components:

• 200': This is likely the beginning of a SQL injection attempt. The number 200 might refer to a particular column or row depending on the context.
• XOR: This is a logical operator used in SQL to control flow based on conditions.
• 20*if(now()=sysdate(),sleep(15),0): This part of the payload is checking if the current time returned by now() is equal to the system date returned by sysdate(). If they are equal, it calls sleep(15), which pauses the execution for 15 seconds. Otherwise, it does nothing (returns 0).
• XOR 'Z': This suggests that it is intended to cause some kind of logical evaluation or error based on the result of the prior statement.

If the system is vulnerable and the condition is true (meaning the current time matches the system date), the database will take longer than expected to respond, indicating to the attacker that the condition was met.

Important Note: Engaging in SQL injection or any unauthorized access to computer systems is illegal and unethical. It's essential to understand security principles to defend systems against such attacks, not to conduct them. If you're interested in SQL security, consider studying defensive programming practices or participating in ethical hacking training under professional guidance.