Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows] 'AppInit_DLLs' = 'imgpsup.dll'
Malicious functions:
Executes the following:
- <SYSTEM32>\ntvdm.exe -f -i2
- <SYSTEM32>\ntvdm.exe -f -i1
- <SYSTEM32>\rundll32.exe Thumbs.sdb _ThumbViewFile
Modifies file system :
Creates the following files:
- <SYSTEM32>\imgpsup.dll
- %WINDIR%\Temp\scs3.tmp
- %WINDIR%\Temp\scs4.tmp
- %WINDIR%\Temp\scs2.tmp
- %TEMP%\Thumbs.sdb
- %TEMP%\118578_sig161208.exe
- %WINDIR%\Temp\scs1.tmp
Deletes the following files:
- %WINDIR%\Temp\scs2.tmp
- %WINDIR%\Temp\scs4.tmp
- %TEMP%\118578_sig161208.exe
- %WINDIR%\Temp\scs1.tmp
- %WINDIR%\Temp\scs3.tmp
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: 'ConsoleWindowClass' WindowName: 'ntvdm-b28.b2c.3b0002'
- ClassName: 'ConsoleWindowClass' WindowName: 'ntvdm-b10.b14.3a0001'
