Win32.HLLW.Autoruner3.475
Added to the Dr.Web virus database:
2019-10-19
Virus description added:
2019-10-21
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKLM>\Software\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe %APPDATA%\lsass.exe'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\lsass.exe"'
- [<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\lsass.exe"'
Creates the following files on removable media
- <Drive name for removable media>:\system.exe
- <Drive name for removable media>:\autorun.inf
Malicious functions
Executes the following
- '%WINDIR%\syswow64\netsh.exe' firewall add allowedprogram program = %APPDATA%\lsass.exename = Nero mode = ENABLE
Modifies file system
Creates the following files
- %TEMP%\gtgrtfc45t5tryh45.exe
- %APPDATA%\lsass.exe
Sets the 'hidden' attribute to the following files
- %APPDATA%\lsass.exe
- <Drive name for removable media>:\system.exe
- <Drive name for removable media>:\autorun.inf
Deletes the following files
- %TEMP%\gtgrtfc45t5tryh45.exe
Miscellaneous
Searches for the following windows
- ClassName: '' WindowName: 'HB'
- ClassName: '' WindowName: 'ibhikhii'
Creates and executes the following
- '%TEMP%\gtgrtfc45t5tryh45.exe'
- '%APPDATA%\lsass.exe' /d %TEMP%\gtgrtfc45t5tryh45.exe
- '%WINDIR%\syswow64\netsh.exe' firewall add allowedprogram program = %APPDATA%\lsass.exename = Nero mode = ENABLE' (with hidden window)
- '%APPDATA%\lsass.exe' /d %TEMP%\gtgrtfc45t5tryh45.exe' (with hidden window)
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