Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe <SYSTEM32>\sysico.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\system.exe
- <Drive name for removable media>:\Autorun.inf
Malicious functions:
Creates and executes the following:
- '<SYSTEM32>\sysico.exe'
Executes the following:
- '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden" /f /v UncheckedValue /t REG_DWORD /d 0
- '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v Shell /t REG_SZ /d "Explorer.exe <SYSTEM32>\sysico.exe"
- '<SYSTEM32>\reg.exe' /c reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v Shell /t REG_SZ /d "Explorer.exe <SYSTEM32>\sysico.exe"
- '<SYSTEM32>\reg.exe' /pid=4088
- '<SYSTEM32>\reg.exe' /pid=3624
- '<SYSTEM32>\reg.exe' /pid=1480
- '<SYSTEM32>\reg.exe' /pid=3640
- '<SYSTEM32>\reg.exe' /pid=280
- '<SYSTEM32>\reg.exe' /pid=592
- '<SYSTEM32>\reg.exe' /pid=1880
- '<SYSTEM32>\reg.exe' /pid=3780
Injects code into
the following system processes:
- <SYSTEM32>\reg.exe
- <SYSTEM32>\cmd.exe
Modifies file system :
Creates the following files:
- C:\system.exe
- C:\Autorun.inf
- <SYSTEM32>\sysico.exe
Sets the 'hidden' attribute to the following files:
- C:\system.exe
- C:\Autorun.inf
- <Drive name for removable media>:\system.exe
- <Drive name for removable media>:\Autorun.inf
Deletes the following files:
- %TEMP%\~DFE1.tmp
Moves the following files:
- from <SYSTEM32>\sysico.exe to <SYSTEM32>\cdk.dll
Miscellaneous:
Searches for the following windows:
- ClassName: '(null)' WindowName: 'Windows Task Manager'
- ClassName: '#32770' WindowName: '(null)'
- ClassName: 'SysListView32' WindowName: '(null)'
