Here are a brief understanding of some common techniques used by Instagram hackers:

Phishing Scams: 

This is a technique where the hacker sends a fake login page or a link to the victim via email, text message, or direct message on Instagram. The victim is asked to enter their login credentials, which the hacker can then use to access their account. Social Media Hackers .

Social Engineering Attacks: 

This is a technique where the hacker gains the trust of the victim by posing as someone they know or pretending to be a trustworthy entity such as Instagram customer support. The hacker may then ask for the victim's login credentials, which they can use to access their account.

Password Cracking: 

This is a technique where the hacker tries to guess the victim's password by using a list of commonly used passwords, dictionary words, or by trying different combinations of characters. If the victim has a weak password, it can be easily cracked.

Malware and Spyware: 

This is a technique where the hacker infects the victim's device with malicious software that can steal their login credentials or allow the hacker to remotely access the victim's device and control it.

It is important to note that hacking into someone's Instagram account without their permission is illegal and unethical. It is important to use social media platforms safely and securely by enabling two-factor authentication and using strong passwords.