Win32.HLLW.Autoruner2.29063
Added to the Dr.Web virus database:
2017-08-16
Virus description added:
2017-08-15
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '1c94bd434dea79bf63edb27b13821e88' = '"%APPDATA%\mscore3.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '1c94bd434dea79bf63edb27b13821e88' = '"%APPDATA%\mscore3.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\1c94bd434dea79bf63edb27b13821e88.exe
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\1c94bd434dea79bf63edb27b13821e88.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\mscore3.exe' = '%APPDATA%\mscore3.exe:*:Enabled:mscore3.exe'
To complicate detection of its presence in the operating system,
forces the system hide from view:
Creates and executes the following:
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\mscore3.exe" "mscore3.exe" ENABLE
Modifies file system:
Creates the following files:
Sets the 'hidden' attribute to the following files:
- %APPDATA%\mscore3.exe
- %HOMEPATH%\Start Menu\Programs\Startup\1c94bd434dea79bf63edb27b13821e88.exe
- <Drive name for removable media>:\1c94bd434dea79bf63edb27b13821e88.exe
- <Drive name for removable media>:\autorun.inf
Network activity:
Connects to:
- 'wi####ms.sytes.net':8007
UDP:
- DNS ASK wi####ms.sytes.net
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