Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'RSSPAM.exe' = ''
Malicious functions:
Creates and executes the following:
- %TEMP%\rsclient.exe
- <Current directory>\yZGeHAlh.exe
Executes the following:
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:"%TEMP%\RES2.tmp"" ""%TEMP%\vbc1.tmp""
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe /noconfig @"%TEMP%\nlzbbp50.cmdline"
Modifies file system :
Creates the following files:
- %TEMP%\RES2.tmp
- <Current directory>\yZGeHAlh.exe
- %TEMP%\rsclient.exe
- %TEMP%\vbc1.tmp
- %TEMP%\nlzbbp50.0.vb
- %TEMP%\nlzbbp50.cmdline
- %TEMP%\nlzbbp50.out
Deletes the following files:
- %TEMP%\nlzbbp50.cmdline
- %TEMP%\nlzbbp50.out
- %TEMP%\nlzbbp50.0.vb
- %TEMP%\RES2.tmp
- %TEMP%\vbc1.tmp
Network activity:
Connects to:
- 'au######on.whatismyip.com':80
TCP:
HTTP GET requests:
- au######on.whatismyip.com/n09230945.asp
UDP:
- DNS ASK au######on.whatismyip.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: 'Indicator' WindowName: ''
- ClassName: '' WindowName: '<Auxiliary name>'
