This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.
Disinfection & Removal
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.
This trojan-downloader is distributed as a file attachment to spam e-mails. The attached programs are typically labelled using legitimate-sounding document names, such as 'invoice', as a simple form of social engineering.
On execution of the attached file, the trojan-downloader will attempt to install itself onto the machine, then contact a remote server for additional files and/or instructions.