Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'MicrosoftEdgeUpdate' = '<Full path to file>'
- [HKLM\Software\Microsoft\Windows\CurrentVersion\Run] 'WindowsDefenderUpdate' = '<Full path to file>'
Creates or modifies the following files
- %APPDATA%\microsoft\windows\start menu\programs\startup\microsoftedgeupdatetask.vbs
- <SYSTEM32>\tasks\microsoftedgeupdatetaskmachinecore
Creates the following files on removable media
- <Drive name for removable media>:\windowsupdate.exe
- <Drive name for removable media>:\autorun.inf
Modifies file system
Creates the following files
- %TEMP%\ir.log
- %APPDATA%\microsoft\windowsupdate\wu_svc.exe
- %TEMP%\svchost_update.exe
- %ALLUSERSPROFILE%\win_services.exe
- %HOMEPATH%\documents\win_update.exe
Sets the 'hidden' attribute to the following files
- %APPDATA%\microsoft\windowsupdate\wu_svc.exe
- %TEMP%\svchost_update.exe
- %ALLUSERSPROFILE%\win_services.exe
- %HOMEPATH%\documents\win_update.exe
- <Drive name for removable media>:\windowsupdate.exe
Network activity
UDP
- DNS ASK mo#####.map.fastly.net
Miscellaneous
Executes the following
- '<SYSTEM32>\cmd.exe' /c schtasks /Create /TN "MicrosoftEdgeUpdateTaskMachineCore" /TR "\"<Full path to file>\"" /SC ONLOGON /RL HIGHEST /F
- '<SYSTEM32>\schtasks.exe' /Create /TN "MicrosoftEdgeUpdateTaskMachineCore" /TR "\"<Full path to file>\"" /SC ONLOGON /RL HIGHEST /F
- '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter CREATE EventName="IRFilter", QueryLanguage="WQL", Query="SELECT * FROM __InstanceModificationEvent WITHIN 60 WHERE TargetInstance ISA 'Win32_...
- '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer CREATE Name="IRConsumer", CommandLineTemplate="<Full path to file>"
- '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding CREATE Filter="__EventFilter.Name='IRFilter'", Consumer="CommandLineEventConsumer.Name='IRConsumer'"
- '<SYSTEM32>\cmd.exe' /c schtasks /Create /TN "MicrosoftEdgeUpdateTaskMachineCore" /TR "\"<Full path to file>\"" /SC ONLOGON /RL HIGHEST /F' (with hidden window)
- '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter CREATE EventName="IRFilter", QueryLanguage="WQL", Query="SELECT * FROM __InstanceModificationEvent WITHIN 60 WHERE TargetInstance ISA 'Win32_...' (with hidden window)
- '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer CREATE Name="IRConsumer", CommandLineTemplate="<Full path to file>"' (with hidden window)
- '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding CREATE Filter="__EventFilter.Name='IRFilter'", Consumer="CommandLineEventConsumer.Name='IRConsumer'"' (with hidden window)
