Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'WindowsSystem32' = '%CommonProgramFiles%\System\uacs.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorun.exe
- <Drive name for removable media>:\RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\Desktop.ini
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%CommonProgramFiles%\System\uacs.exe' = '%CommonProgramFiles%\System\uacs.exe:*:Enabled:WindowsSystem32'
Creates and executes the following:
- %CommonProgramFiles%\System\uacs.exe
Terminates or attempts to terminate
the following user processes:
- smc.exe
- outpost.exe
Modifies file system :
Creates the following files:
- %CommonProgramFiles%\System\uacs.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorun.exe
- %CommonProgramFiles%\System\uacs.exe
Network activity:
Connects to:
- '<Private IP address>':139
- 'c.#le':6667
- '<Private IP address>':135
- '<Private IP address>':445
UDP:
- DNS ASK c.#le