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Trojan.Siggen13.11805

Added to the Dr.Web virus database: 2021-04-25

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce] '{49697869-be8e-427d-81a0-c334d1d14950}' = '"%ALLUSERSPROFILE%\Package Cache\{49697869-be8e-427d-81a0-c334d1d14950}\VC_red...
Creates or modifies the following files
  • <SYSTEM32>\tasks\wildix\wiservice update recovery
Malicious functions
Executes the following
  • '%WINDIR%\syswow64\taskkill.exe' /F /IM vncsrv.exe
Modifies file system
Creates the following files
  • %TEMP%\nshe022.tmp\modern-header.bmp
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1046\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1046\license.rtf
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1049\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1049\license.rtf
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1055\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1055\license.rtf
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\2052\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\2052\license.rtf
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\3082\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\3082\license.rtf
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\bootstrapperapplicationdata.xml
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.be\vc_redist.x86.exe
  • %WINDIR%\softwaredistribution\scanfile\ea3d7dda-d6e6-4016-8c0c-21f6a90c06a3\source.cab
  • %ALLUSERSPROFILE%\package cache\{49697869-be8e-427d-81a0-c334d1d14950}\vc_redist.x86.exe
  • %ALLUSERSPROFILE%\package cache\{49697869-be8e-427d-81a0-c334d1d14950}\state.rsm
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\windows7_msu_x64
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\vcruntimeminimum_x86
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\vcruntimeadditional_x86
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\cab54a5cabbe7274d8a22eb58060aab7623
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\cabb3e1576d1fefbb979e13b1a5379e0b16
  • C:\44dc4f172ab25dca2dbf06c3ec\$dpx$.tmp\43e27b1ee0172544a97b4371d820ae2d.tmp
  • C:\44dc4f172ab25dca2dbf06c3ec\$dpx$.tmp\739c15f0d9205946adf543b4c8bc28c8.tmp
  • C:\44dc4f172ab25dca2dbf06c3ec\$dpx$.tmp\e6886132e6578e49b0227ad7c6d89d25.tmp
  • C:\44dc4f172ab25dca2dbf06c3ec\$dpx$.tmp\f48ab4f16766c04fb41a75f857e265ff.tmp
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1045\license.rtf
  • %TEMP%\dd_vcredist_x86_20210424182355.log
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1045\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\license.rtf
  • %TEMP%\nshe022.tmp\nsexec.dll
  • %TEMP%\nshe022.tmp\inetc.dll
  • %ProgramFiles(x86)%\wildix\screensharing\setupwiservice.exe
  • %TEMP%\nsx407a.tmp\nsexec.dll
  • %TEMP%\nsx407a.tmp\inetc.dll
  • %ProgramFiles(x86)%\wildix\wiservice\vc_redist_2019.x86.exe
  • %WINDIR%\temp\{fcccb5c9-19c0-4728-9242-bacef3fac128}\.cr\vc_redist_2019.x86.exe
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\wixstdba.dll
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\thm.xml
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\logo.png
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1028\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1042\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1028\license.rtf
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1029\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1029\license.rtf
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1031\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1031\license.rtf
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1036\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1036\license.rtf
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1040\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1040\license.rtf
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1041\thm.wxl
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1041\license.rtf
  • %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.ba\1042\license.rtf
  • %WINDIR%\softwaredistribution\scanfile\ea3d7dda-d6e6-4016-8c0c-21f6a90c06a3\package.cab
Deletes the following files
  • %WINDIR%\softwaredistribution\scanfile\ea3d7dda-d6e6-4016-8c0c-21f6a90c06a3\source.cab
Moves the following files
  • from %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\windows7_msu_x64 to %ALLUSERSPROFILE%\package cache\.unverified\windows7_msu_x64
  • from %ALLUSERSPROFILE%\package cache\.unverified\windows7_msu_x64 to %ALLUSERSPROFILE%\package cache\54050a5f8ae7f0c56e553f0090146c17a1d2bf8d\packages\patch\x64\windows6.1-kb2999226-x64.msu
  • from %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\vcruntimeminimum_x86 to %ALLUSERSPROFILE%\package cache\.unverified\vcruntimeminimum_x86
  • from %ALLUSERSPROFILE%\package cache\.unverified\vcruntimeminimum_x86 to %ALLUSERSPROFILE%\package cache\{19f7e289-17b8-44ec-a099-927507b6f739}v14.21.27702\packages\vcruntimeminimum_x86\vc_runtimeminimum_x86.msi
  • from %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\cab54a5cabbe7274d8a22eb58060aab7623 to %ALLUSERSPROFILE%\package cache\.unverified\cab54a5cabbe7274d8a22eb58060aab7623
  • from %ALLUSERSPROFILE%\package cache\.unverified\cab54a5cabbe7274d8a22eb58060aab7623 to %ALLUSERSPROFILE%\package cache\{19f7e289-17b8-44ec-a099-927507b6f739}v14.21.27702\packages\vcruntimeminimum_x86\cab1.cab
  • from %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\vcruntimeadditional_x86 to %ALLUSERSPROFILE%\package cache\.unverified\vcruntimeadditional_x86
  • from %ALLUSERSPROFILE%\package cache\.unverified\vcruntimeadditional_x86 to %ALLUSERSPROFILE%\package cache\{213668db-2263-4e2d-abb8-487fd539130e}v14.21.27702\packages\vcruntimeadditional_x86\vc_runtimeadditional_x86.msi
  • from %WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\cabb3e1576d1fefbb979e13b1a5379e0b16 to %ALLUSERSPROFILE%\package cache\.unverified\cabb3e1576d1fefbb979e13b1a5379e0b16
  • from %ALLUSERSPROFILE%\package cache\.unverified\cabb3e1576d1fefbb979e13b1a5379e0b16 to %ALLUSERSPROFILE%\package cache\{213668db-2263-4e2d-abb8-487fd539130e}v14.21.27702\packages\vcruntimeadditional_x86\cab1.cab
  • from C:\44dc4f172ab25dca2dbf06c3ec\$dpx$.tmp\43e27b1ee0172544a97b4371d820ae2d.tmp to C:\44dc4f172ab25dca2dbf06c3ec\wsusscan.cab
  • from C:\44dc4f172ab25dca2dbf06c3ec\$dpx$.tmp\739c15f0d9205946adf543b4c8bc28c8.tmp to C:\44dc4f172ab25dca2dbf06c3ec\windows6.1-kb2999226-x64.cab
  • from C:\44dc4f172ab25dca2dbf06c3ec\$dpx$.tmp\e6886132e6578e49b0227ad7c6d89d25.tmp to C:\44dc4f172ab25dca2dbf06c3ec\windows6.1-kb2999226-x64-pkgproperties.txt
  • from C:\44dc4f172ab25dca2dbf06c3ec\$dpx$.tmp\f48ab4f16766c04fb41a75f857e265ff.tmp to C:\44dc4f172ab25dca2dbf06c3ec\windows6.1-kb2999226-x64.xml
Network activity
Connects to
  • 'fi###.wildix.com':443
  • 'r3.#.lencr.org':80
  • 'microsoft.com':80
  • 'fi#####es.wildix.com':80
TCP
  • 'fi###.wildix.com':443
UDP
  • DNS ASK fi###.wildix.com
  • DNS ASK r3.#.lencr.org
  • DNS ASK microsoft.com
  • DNS ASK fi#####es.wildix.com
Miscellaneous
Searches for the following windows
  • ClassName: '#32770' WindowName: ''
  • ClassName: 'SysListView32' WindowName: ''
  • ClassName: '' WindowName: ''
Creates and executes the following
  • '%ProgramFiles(x86)%\wildix\screensharing\setupwiservice.exe' /S
  • '%ProgramFiles(x86)%\wildix\wiservice\vc_redist_2019.x86.exe' /install /quiet /norestart
  • '%WINDIR%\temp\{fcccb5c9-19c0-4728-9242-bacef3fac128}\.cr\vc_redist_2019.x86.exe' -burn.clean.room="%ProgramFiles(x86)%\Wildix\WIService\vc_redist_2019.x86.exe" -burn.filehandle.attached=192 -burn.filehandle.self=200 /install /quiet /norestart
  • '%WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.be\vc_redist.x86.exe' -q -burn.elevated BurnPipe.{5C3038C1-8AB7-48CE-BFEB-2810B1308DCA} {0EA64422-9537-4E77-9409-BF2575124221} 1704
  • '%WINDIR%\syswow64\cmd.exe' /C taskkill /F /IM vncsrv.exe' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /C schtasks /create /SC ONSTART /TN "Wildix\WIService update recovery" /TR "%ProgramFiles(x86)%\Wildix\ScreenSharing\SetupWIService.exe /S" /RU SYSTEM /RL HIGHEST /F' (with hidden window)
  • '%WINDIR%\temp\{529a0120-abe2-44cf-bf1e-8a8cdf29199d}\.be\vc_redist.x86.exe' -q -burn.elevated BurnPipe.{5C3038C1-8AB7-48CE-BFEB-2810B1308DCA} {0EA64422-9537-4E77-9409-BF2575124221} 1704' (with hidden window)
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /C taskkill /F /IM vncsrv.exe
  • '%WINDIR%\syswow64\cmd.exe' /C schtasks /create /SC ONSTART /TN "Wildix\WIService update recovery" /TR "%ProgramFiles(x86)%\Wildix\ScreenSharing\SetupWIService.exe /S" /RU SYSTEM /RL HIGHEST /F
  • '%WINDIR%\syswow64\schtasks.exe' /create /SC ONSTART /TN "Wildix\WIService update recovery" /TR "%ProgramFiles(x86)%\Wildix\ScreenSharing\SetupWIService.exe /S" /RU SYSTEM /RL HIGHEST /F
  • '<SYSTEM32>\wusa.exe' "%ALLUSERSPROFILE%\Package Cache\54050A5F8AE7F0C56E553F0090146C17A1D2BF8D\packages\Patch\x64\Windows6.1-KB2999226-x64.msu" /quiet /norestart

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