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A Trojan malware attack is a type of malicious code or software that disguises itself as a legitimate program or file to trick users into executing it. Once executed, the Trojan can perform various harmful actions on the infected system or network, such as stealing data, deleting files, or installing other malware. There are different types of Trojan malware attacks, depending on their purpose and behavior. Two common types are:

• Rootkit: A rootkit is a type of Trojan that hides itself and other malware from detection and removal by antivirus software or system tools. A rootkit can modify the operating system or the firmware of the device to gain persistent and privileged access to the system. A rootkit can also intercept and manipulate system calls, network traffic, or user input to conceal its activities or redirect them to malicious servers.
• Backdoor: A backdoor is a type of Trojan that creates a secret or unauthorized access point to the infected system or network. A backdoor can allow an attacker to remotely control the system, execute commands, upload or download files, or monitor the system activity. A backdoor can also be used to install other malware or launch further attacks on other systems or networks.

References:

• [Implementing and Operating Cisco Security Core Technologies (SCOR) v1.0], Module 1: Malware Threats, Lesson 1: Identifying Malware Threats, Topic: Trojan Horse
• What is a Trojan? Is it a virus or is it malware? - Norton™
• Trojan Horse Examples (2024): The 6 Worst Attacks Ever - SoftwareLab