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.

A loader is malicious software that infiltrates devices to deliver malicious payloads. This malware is capable of infecting victims’ computers, analyzing their system information, and installing other types of threats, such as trojans or stealers. Criminals usually deliver loaders through phishing emails and links by relying on social engineering to trick users into downloading and running their executables. Loaders employ advanced evasion and persistence tactics to avoid detection.

SSLoad is a malicious loader or downloader that is used to infiltrate target systems through phishing emails, perform reconnaissance and transmit it back to its operators delivering malicious payloads. To avoid detection, SSLoad employs various encryption methods and delivery techniques highlighting its versatile nature and complexity. It is believed to be a part of Malware-as-a-Service (MaaS) operation given its diverse delivery methods and implemented techniques.