Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'd4ff25ff665c3f2c3851deb0b69e8dc5' = '"%TEMP%\server.exe" ..'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'd4ff25ff665c3f2c3851deb0b69e8dc5' = '"%TEMP%\server.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\d4ff25ff665c3f2c3851deb0b69e8dc5.exe
Creates the following files on removable media:
- <Drive name for removable media>:\d4ff25ff665c3f2c3851deb0b69e8dc5.exe
- <Drive name for removable media>:\autorun.inf
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\server.exe' = '%TEMP%\server.exe:*:Enabled:server.exe'
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\server.exe" "server.exe" ENABLE
Modifies file system:
Creates the following files:
- %TEMP%\server.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\d4ff25ff665c3f2c3851deb0b69e8dc5.exe
- <Drive name for removable media>:\autorun.inf
- %TEMP%\server.exe
- %HOMEPATH%\Start Menu\Programs\Startup\d4ff25ff665c3f2c3851deb0b69e8dc5.exe
Network activity:
Connects to:
- 'ab####r.ddns.net':5553
UDP:
- DNS ASK ab####r.ddns.net
Miscellaneous:
Creates and executes the following:
- '%TEMP%\server.exe'
