A backdoor is a type of cybersecurity threat that allows attackers to secretly compromise a system and conduct malicious activities, such as stealing data and modifying files. Backdoors can be difficult to detect, as they often use legitimate system applications to evade defense mechanisms. Threat actors often utilize special malware, such as PlugX, to establish backdoors on target devices.

Havoc is an advanced post-exploitation framework used by hackers to take control of a system once they've breached it. With Havoc, attackers can run commands remotely, inject malicious processes, and access sensitive data. It's often used in targeted attacks, allowing cybercriminals to stay hidden in a network while stealing information or launching further attacks. Its flexibility and ability to bypass detection make it a serious threat, especially in environments that rely on traditional security tools.

Stealers are a group of malicious software that are intended for gaining unauthorized access to users’ information and transferring it to the attacker. The stealer malware category includes various types of programs that focus on their particular kind of data, including files, passwords, and cryptocurrency. Stealers are capable of spying on their targets by recording their keystrokes and taking screenshots. This type of malware is primarily distributed as part of phishing campaigns.