Reads data files stored by FTP clients

Tries to access configuration files associated with programs like FileZilla.

Reads local data of messenger clients

Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

Reads user/profile data of web browsers

Infostealers often target stored browser data, which can include saved credentials etc.

Writes to the Master Boot Record (MBR)

Bootkits write to the MBR to gain persistence at a level below the operating system.

Suspicious use of SetThreadContext