Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'hcosi' = 'rundll32.exe "%TEMP%\hcosi.dll",SteamGameServerStats'
Malicious functions:
Executes the following:
- '<SYSTEM32>\rundll32.exe' "%TEMP%\hcosi.dll",MessageBoxChecked
Modifies file system :
Creates the following files:
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\id=AgAoAAEAZ_wCAAEFBhcAAAAAAAAAAAAAAAAAAAAYDAUUCwAAAGQl-yLhEYijrLhvgiZvmW8AAFVVVVVVVVVVVVVVVVVVVVWec84BKk_tXHTlAgBWVFFcXlNCWH9nd3RrZ3hqegYBAr6RIidhk71gNFY[1]
- %TEMP%\hcosi.dll
Network activity:
Connects to:
- '11#####.##n24.theuploadbusiness.com':80
TCP:
HTTP GET requests:
- 11#####.##n24.theuploadbusiness.com/file/id=AgAoAAEAZ_wCAAEFBhcAAAAAAAAAAAAAAAAAAAAYDAUUCwAAAGQl-yLhEYijrLhvgiZvmW8AAFVVVVVVVVVVVVVVVVVVVVWec84BKk_tXHTlAgBWVFFcXlNCWH9nd3RrZ3hqegYBAr6RIidhk71gNFYA&rt=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
UDP:
- DNS ASK 11#####.##n24.theuploadbusiness.com
