It is a relatively harmless browser hijacker that changes the default Internet Explorer start page to www.7000n.com site. The spyware doesn't allow to restore standard settings. It has no dangerous payload.
twain_16.dll
HKEY_CLASSES_ROOTTwain_16.iebhoHKEY_CLASSES_ROOTTwain_16.iebho.1AE21A223-C4CA-43D7-9764-4FC6DF529F4D6F9D44B8-E418-49C1-885C-1015DDDBFFC4F05FC250-632C-424C-83D8-64640B6BED21