Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe <SYSTEM32>\winsas.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\driver
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
- file extensions
blocks execution of the following system utilities:
- Windows Task Manager (Taskmgr)
- Registry Editor (RegEdit)
Creates and executes the following:
- <SYSTEM32>\winsas.exe
Executes the following:
- <SYSTEM32>\net1.exe STOP NOD32 Kernel Service
- <SYSTEM32>\net1.exe STOP AntiVirScheduler
- <SYSTEM32>\net1.exe STOP MCSHIELD
- <SYSTEM32>\net1.exe STOP AntiVirservice
- <SYSTEM32>\taskkill.exe /f /im dap.exe /t
- <SYSTEM32>\net1.exe STOP SharedAccess
- <SYSTEM32>\net1.exe STOP wuauserv
- <SYSTEM32>\net.exe STOP AntiVirScheduler
- <SYSTEM32>\net.exe STOP MCSHIELD
- <SYSTEM32>\regsvr32.exe /s MSWINSCK.OCX
- <SYSTEM32>\net.exe STOP NOD32 Kernel Service
- <SYSTEM32>\net.exe STOP SharedAccess
- <SYSTEM32>\net.exe STOP wuauserv
- <SYSTEM32>\net.exe STOP AntiVirservice
Modifies file system :
Creates the following files:
- <SYSTEM32>\winsas.ico
- <SYSTEM32>\winsas
- C:\i
- <SYSTEM32>\winsas.exe
- <SYSTEM32>\MSWINSCK.OCX
- C:\autorun.inf
- C:\driver
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\driver.exe
- <SYSTEM32>\winsas.exe
- <Drive name for removable media>:\autorun.inf
- C:\autorun.inf
- C:\driver.exe
Deletes the following files:
- %TEMP%\~DF38BB.tmp
- C:\i
- C:\driver
- <Drive name for removable media>:\driver
Network activity:
Connects to:
- 'localhost':1051
- '<Private IP address>':139
- '<Private IP address>':445
Miscellaneous:
Searches for the following windows:
- ClassName: '' WindowName: 'Windows Task Manager'
- ClassName: '' WindowName: 'System Configuration Utility'
- ClassName: '' WindowName: '<SYSTEM32>'
- ClassName: '' WindowName: 'Registry Editor'
- ClassName: '' WindowName: ''
- ClassName: 'MS_AutodialMonitor' WindowName: ''
- ClassName: 'MS_WebcheckMonitor' WindowName: ''
