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Trojan.Siggen9.31984
Added to the Dr.Web virus database:
2020-04-02
Virus description added:
2020-04-07
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
[<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\] 'mDNSResolver' = '%APPDATA%\mDNSResolver.exe'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mysqld' = '"%APPDATA%\explorer.exe"'
[<HKCU>\software\microsoft\windows\currentversion\run] 'jquery' = 'wscript.exe //B "%APPDATA%\jquery.js"'
[<HKLM>\software\microsoft\windows\currentversion\run] 'jquery' = 'wscript.exe //B "%APPDATA%\jquery.js"'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'File' = '"%ProgramFiles%\Java\jre1.8.0_45\bin\javaw.exe" -jar "%APPDATA%\java-update.jar"'
Creates or modifies the following files
%APPDATA%\microsoft\windows\start menu\programs\startup\svchost.exe
%APPDATA%\microsoft\windows\start menu\programs\startup\ctfmon.exe
%APPDATA%\microsoft\windows\start menu\programs\startup\explorer.exe
%APPDATA%\microsoft\windows\start menu\programs\startup\spoolsv.exe
%APPDATA%\microsoft\windows\start menu\programs\startup\jquery.js
%APPDATA%\microsoft\windows\start menu\programs\startup\java-updater.cmd
%APPDATA%\microsoft\windows\start menu\programs\startup\java-updater.jar
Creates the following files on removable media
Malicious functions
Creates and executes the following
'%APPDATA%\svchost.exe'
'%APPDATA%\ctfmon.exe'
'%APPDATA%\mdnsresolver.exe' -m "%APPDATA%\ctfmon.exe"
'%APPDATA%\explorer.exe'
'%APPDATA%\spoolsv.exe'
'%APPDATA%\exec.exe' sekurlsa::logonpasswords exit
Modifies file system
Creates the following files
%LOCALAPPDATA%\microsoft\windows\history\history.ie5\mshist012020040120200402\index.dat
%WINDIR%\serviceprofiles\networkservice\appdata\locallow\microsoft\cryptneturlcache\metadata\f0accf77cdcbff39f6191887f6d2d357
%APPDATA%\java-update.jar
%APPDATA%\jquery.js
%TEMP%\wk128nut.dll
%TEMP%\res8a57.tmp
%APPDATA%\data.dat
%TEMP%\csc8a46.tmp
%APPDATA%\exec.exe
%APPDATA%\spoolsv.exe
%TEMP%\wk128nut.out
%TEMP%\wk128nut.cmdline
%TEMP%\wk128nut.0.cs
%APPDATA%\explorer.exe
%APPDATA%\mdnsresolver.exe
%APPDATA%\ctfmon.exe
%APPDATA%\svchost.exe
%APPDATA%\config.enes
%WINDIR%\serviceprofiles\networkservice\appdata\locallow\microsoft\cryptneturlcache\content\f0accf77cdcbff39f6191887f6d2d357
%TEMP%\hsperfdata_user\2992
Sets the 'hidden' attribute to the following files
<Drive name for removable media>:\jquery.js
Deletes the following files
%APPDATA%\config.enes
%TEMP%\res8a57.tmp
%TEMP%\csc8a46.tmp
%APPDATA%\exec.exe
%APPDATA%\data.dat
%TEMP%\wk128nut.0.cs
%TEMP%\wk128nut.out
%TEMP%\wk128nut.cmdline
%TEMP%\wk128nut.dll
Substitutes the following files
%APPDATA%\exec.exe
%APPDATA%\data.dat
Network activity
Connects to
TCP
HTTP GET requests
http://www.ex##ple.com/
http://www.ex##ple.com/favicon.ico
http://in.#ect.me/bu9/win64.exe
http://in.#ect.me/bu9/win642.exe
http://in.#ect.me/bu9/winmtr64.exe
http://in.#ect.me/bu9/mimi/64/exec.exe
http://in.#ect.me/bu9/csb64.exe
http://in.#ect.me/bu9/jquery.js
http://in.#ect.me/bu9/java-ra.jar
http://in.#ect.me/bu9/java-update.cmd
http://in.#ect.me/bu9/reverse.pwr
http://www.microsoft.com/pki/certs/MicRooCerAut_2010-06-23.crt
http://ip##pi.com/json/
HTTP POST requests
http://in.#ect.me/bu9/post.php
'xn##49j.co':8008
'xn##49j.co':80
'xn##49j.co':443
'xn##49j.co':10101
UDP
DNS ASK ex##ple.com
DNS ASK in.#ect.me
DNS ASK xn##49j.co
DNS ASK ip##pi.com
DNS ASK microsoft.com
Miscellaneous
Searches for the following windows
ClassName: 'Static' WindowName: ''
ClassName: 'MS_AutodialMonitor' WindowName: ''
ClassName: 'MS_WebCheckMonitor' WindowName: ''
Creates and executes the following
'<SYSTEM32>\wscript.exe' "%APPDATA%\jquery.js"
'<SYSTEM32>\wscript.exe' //B %APPDATA%\jquery.js
'%WINDIR%\microsoft.net\framework64\v2.0.50727\csc.exe' /noconfig /fullpaths @"%TEMP%\wk128nut.cmdline"' (with hidden window)
'%WINDIR%\microsoft.net\framework64\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES8A57.tmp" "%TEMP%\CSC8A46.tmp"' (with hidden window)
'<SYSTEM32>\wscript.exe' //B %APPDATA%\jquery.js' (with hidden window)
'%PROGRAMDATA%\oracle\java\javapath\java.exe' -jar %APPDATA%\java-update.jar' (with hidden window)
Executes the following
'%ProgramFiles%\internet explorer\iexplore.exe' -Embedding
'<SYSTEM32>\netsh.exe' wlan show profiles
'<SYSTEM32>\netsh.exe' wlan show profiles name= key=clear
'%WINDIR%\microsoft.net\framework64\v2.0.50727\csc.exe' /noconfig /fullpaths @"%TEMP%\wk128nut.cmdline"
'%WINDIR%\microsoft.net\framework64\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES8A57.tmp" "%TEMP%\CSC8A46.tmp"
'%ProgramFiles%\java\jre1.8.0_45\bin\javaw.exe' -jar "%APPDATA%\java-update.jar"
'%ProgramFiles%\java\jre1.8.0_45\bin\javaw.exe' -jar "%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\java-updater.jar"
'<SYSTEM32>\rundll32.exe' <SYSTEM32>\FirewallControlPanel.dll,ShowNotificationDialog /configure /ETOnly 0 /OnProfiles 6 /OtherAllowed 0 /OtherBlocked 0 /OtherEdgeAllowed 0 /NewBlocked 4 "%ProgramFiles%\java\jre1.8.0_45\...
'<SYSTEM32>\wbem\wmic.exe' /node:localhost /namespace:\\root\SecurityCenter2 path AntiVirusProduct get /format:list
'<SYSTEM32>\cmd.exe'
'<SYSTEM32>\wbem\wmic.exe' /node:localhost /namespace:\\root\SecurityCenter2 path FirewallProduct get /format:list
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
Download Dr.Web for Android
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