Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'wextract_cleanup0' = 'rundll32.exe <SYSTEM32>\advpack.dll,DelNodeRunDLL32 "%TEMP%\IXP000.TMP\"'
Creates the following services:
- [<HKLM>\SYSTEM\ControlSet001\Services\nvvsvc.com.cn] 'Start' = '00000002'
Malicious functions:
Creates and executes the following:
- '<SYSTEM32>\nvvsvc.com.cn.exe'
- '<SYSTEM32>\temp1.exe'
- '%TEMP%\IXP000.TMP\225.exe'
Executes the following:
- '<SYSTEM32>\cmd.exe' /c %WINDIR%\uninstal.bat
Modifies file system :
Creates the following files:
- <SYSTEM32>\nvvsvc.com.cn.exe
- %WINDIR%\uninstal.bat
- %TEMP%\IXP000.TMP\225.exe
- <SYSTEM32>\temp1.exe
Sets the 'hidden' attribute to the following files:
- <SYSTEM32>\nvvsvc.com.cn.exe
Deletes the following files:
- <SYSTEM32>\temp1.exe
- %TEMP%\IXP000.TMP\225.exe
Network activity:
Connects to:
- '17###.223344.info':80
TCP:
HTTP GET requests:
- 17###.223344.info/ip.txt
UDP:
- DNS ASK 17###.223344.info
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
