The application halloween_terror_screensaver.exe has been detected as a potentially unwanted program by 13 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer, however the file is not signed with an authenticode signature from a trusted source. This will display context specific advertisements in the browser as well as attempt to modify the browser's search provider. The file has been seen being downloaded from dw.uptodown.com and multiple other hosts. While running, it connects to the Internet address static.5-9-51-208.clients.your-server.de on port 80 using the HTTP protocol.