Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- <SYSTEM32>\tasks\googleupdatetaskmachineqc
Malicious functions
To complicate detection of its presence in the operating system,
adds antivirus exclusion:
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath @($env:UserProfile, $env:ProgramFiles) -Force
Injects code into
the following system processes:
- <SYSTEM32>\wermgr.exe
Hooks functions
in browsers
- firefox.exe process, advapi32.dll module
Terminates or attempts to terminate
the following system processes:
- <SYSTEM32>\dialer.exe
Modifies file system
Creates the following files
- %TEMP%\yvmguhsrjiri.tmp
- %TEMP%\cvwrzfnllnvc.xml
- %ProgramFiles%\google\chrome\updater.exe
- %WINDIR%\temp\yvmguhsrjiri.tmp
- %WINDIR%\temp\cvwrzfnllnvc.xml
- %WINDIR%\temp\mhbvhrgxfglm.sys
- %ALLUSERSPROFILE%\microsoft\windows\wer\reportqueue\appcrash_dialer.exe_81ae4051d76af8af66cfc22f868a961f0228e_cab_05f5dfd3\report.wer.tmp
- %ALLUSERSPROFILE%\microsoft\windows\wer\reportqueue\appcrash_dialer.exe_42ed9523873bb7b7fdb91c8e536d1b36143c8672_cab_03e1e57e\report.wer.tmp
Deletes the following files
- %TEMP%\cvwrzfnllnvc.xml
- %WINDIR%\temp\cvwrzfnllnvc.xml
- %WINDIR%\temp\yvmguhsrjiri.tmp
Moves the following files
- from %ALLUSERSPROFILE%\microsoft\windows\wer\reportqueue\appcrash_dialer.exe_81ae4051d76af8af66cfc22f868a961f0228e_cab_05f5dfd3\report.wer.tmp to %ALLUSERSPROFILE%\microsoft\windows\wer\reportqueue\appcrash_dialer.exe_81ae4051d76af8af66cfc22f868a961f0228e_cab_05f5dfd3\report.wer
- from %ALLUSERSPROFILE%\microsoft\windows\wer\reportqueue\appcrash_dialer.exe_42ed9523873bb7b7fdb91c8e536d1b36143c8672_cab_03e1e57e\report.wer.tmp to %ALLUSERSPROFILE%\microsoft\windows\wer\reportqueue\appcrash_dialer.exe_42ed9523873bb7b7fdb91c8e536d1b36143c8672_cab_03e1e57e\report.wer
Substitutes the following files
- %WINDIR%\temp\yvmguhsrjiri.tmp
Modifies the HOSTS file.
Miscellaneous
Creates and executes the following
- '%ProgramFiles%\google\chrome\updater.exe'
Executes the following
- '<SYSTEM32>\cmd.exe' /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop bits & sc stop dosvc
- '<SYSTEM32>\sc.exe' stop UsoSvc
- '<SYSTEM32>\sc.exe' stop WaaSMedicSvc
- '<SYSTEM32>\sc.exe' stop wuauserv
- '<SYSTEM32>\sc.exe' stop bits
- '<SYSTEM32>\sc.exe' stop dosvc
- '<SYSTEM32>\cmd.exe' /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>\dialer.exe'
- '<SYSTEM32>\schtasks.exe' /delete /f /tn "GoogleUpdateTaskMachineQC"
- '<SYSTEM32>\powercfg.exe' /x -hibernate-timeout-ac 0
- '<SYSTEM32>\schtasks.exe' /create /f /ru "System" /tn "GoogleUpdateTaskMachineQC" /xml "%TEMP%\cvwrzfnllnvc.xml"
- '<SYSTEM32>\powercfg.exe' /x -hibernate-timeout-dc 0
- '<SYSTEM32>\powercfg.exe' /x -standby-timeout-ac 0
- '<SYSTEM32>\schtasks.exe' /run /tn "GoogleUpdateTaskMachineQC"
- '<SYSTEM32>\powercfg.exe' /x -standby-timeout-dc 0
- '<SYSTEM32>\schtasks.exe' /create /f /ru "System" /tn "GoogleUpdateTaskMachineQC" /xml "%WINDIR%\TEMP\cvwrzfnllnvc.xml"
