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.

Remote access trojans (RATs) are a type of malware that enables attackers to establish complete to partial control over infected computers. Such malicious programs often have a modular design, offering a wide range of functionalities for conducting illicit activities on compromised systems. Some of the most common features of RATs include access to the users’ data, webcam, and keystrokes. This malware is often distributed through phishing emails and links.

Sality is a highly sophisticated malware known for infecting executable files and rapidly spreading across networks. It primarily creates a peer-to-peer botnet that is used for malicious activities such as spamming, data theft, and downloading additional malware. Sality has strong persistence mechanisms, including disabling security software, making it difficult to remove. Its ability to spread quickly and silently, along with its polymorphic nature, allows it to evade detection by traditional antivirus solutions.