Win32.HLLW.Autoruner2.41999
Added to the Dr.Web virus database:
2018-07-19
Virus description added:
2018-07-19
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '98b12b2f0a4f9b3e5fdc0a76397dfff7' = '"%APPDATA%\server.exe" ..'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '98b12b2f0a4f9b3e5fdc0a76397dfff7' = '"%APPDATA%\server.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\98b12b2f0a4f9b3e5fdc0a76397dfff7.exe
Creates the following files on removable media:
- <Drive name for removable media>:\98b12b2f0a4f9b3e5fdc0a76397dfff7.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] '%APPDATA%\server.exe' = '%APPDATA%\server.exe:*:Enabled:server.exe'
To complicate detection of its presence in the operating system,
forces the system hide from view:
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\server.exe" "server.exe" ENABLE
Injects code into
the following user processes:
Modifies file system:
Creates the following files:
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\98b12b2f0a4f9b3e5fdc0a76397dfff7.exe
- <Drive name for removable media>:\autorun.inf
- %APPDATA%\server.exe
- %HOMEPATH%\Start Menu\Programs\Startup\98b12b2f0a4f9b3e5fdc0a76397dfff7.exe
Miscellaneous:
Creates and executes the following:
- '<Full path to file>'
- '%APPDATA%\server.exe'
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