Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'd3a537f9cd542c1252a93ac24fcd431a' = '"%TEMP%\systaem.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'd3a537f9cd542c1252a93ac24fcd431a' = '"%TEMP%\systaem.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\d3a537f9cd542c1252a93ac24fcd431a.exe
Creates the following files on removable media:
- <Drive name for removable media>:\d3a537f9cd542c1252a93ac24fcd431a.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\systaem.exe' = '%TEMP%\systaem.exe:*:Enabled:systaem.exe'
Creates and executes the following:
- '%TEMP%\systaem.exe'
- '%HOMEPATH%\Local Settings\Tempserver.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\systaem.exe" "systaem.exe" ENABLE
Modifies file system :
Creates the following files:
- %TEMP%\systaem.exe
- %HOMEPATH%\Local Settings\Tempserver.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\d3a537f9cd542c1252a93ac24fcd431a.exe
Network activity:
Connects to:
- 'ch#####a1996.linkpc.net':288
UDP:
- DNS ASK ch#####a1996.linkpc.net
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'
