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Trojan.Siggen15.13645

Added to the Dr.Web virus database: 2021-09-10

Virus description added:

Technical Information

To ensure autorun and distribution
Sets the following service settings
  • [<HKLM>\System\CurrentControlSet\Services\dndykyaz] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\dndykyaz] 'ImagePath' = '%WINDIR%\SysWOW64\dndykyaz\ejfxvyk.exe /d"<Full path to file>"'
  • [<HKLM>\SYSTEM\CurrentControlSet\services\dndykyaz] 'ImagePath' = '%WINDIR%\SysWOW64\dndykyaz\ejfxvyk.exe'
Creates the following services
  • 'dndykyaz' %WINDIR%\SysWOW64\dndykyaz\ejfxvyk.exe /d"<Full path to file>"
  • 'dndykyaz' %WINDIR%\SysWOW64\dndykyaz\ejfxvyk.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\dndykyaz' = '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
  • %TEMP%\ejfxvyk.exe
  • %WINDIR%\syswow64\config\systemprofile:.repos
Moves the following files
  • from %TEMP%\ejfxvyk.exe to %WINDIR%\syswow64\dndykyaz\ejfxvyk.exe
Deletes itself.
Network activity
Connects to
  • 'mi##########m.mail.protection.outlook.com':25
  • '95.##6.195.92':426
  • '21#.#27.140.23':426
  • '5.##.37.41':426
  • 'google.com':80
  • 'mx###.upcmail.net':25
  • 'ma####lay24.usz.ch':25
  • 'kr.##upert.com':443
  • 'mx#.##ailsrvr.com':25
  • 'eu#.###.#rotection.outlook.com':25
  • 'al######x-vip2.prodigy.net':25
  • 'mx.##a.untd.com':25
  • 'em##.freenet.de':25
  • 'mx##.###us-vadesecure.net':25
  • 'mx.#####.#e.cust.b.hostedemail.com':25
  • 'mx.####dom-graphics.com':25
  • 'mx.###intpcs.com':25
  • 'sp###.#ail.gandi.net':25
  • '19#.#6.146.41':426
  • 'mx##.##il.icloud.com':25
  • '19#.#6.146.43':426
  • 'mx##.#ail.citi.com':25
  • 'de###twax.ru':443
  • 'de###twax.ru':482
  • 'mx###.##stedmxserver.com':25
  • 'al######x-vip1.prodigy.net':25
  • 'mx####.##il.gm0.yahoodns.net':25
  • 'fa###ool.xyz':10060
  • 'mx##.mail.com':25
  • 'ma#######xcite.roc2.bluetie.com':25
  • 'mx.####ght.synacor.com':25
  • 'mx#.##tsolmail.net':25
  • 'mx#.#omcast.net':25
  • 'cx#.##.#.cloudfilter.net':25
  • 'mt##.##0.yahoodns.net':25
  • 'sh########l.mx.a.cloudfilter.net':25
  • 'sm#####.iomartmail.com':25
  • 'sm##.##broadband.co.uk':25
  • 'mx##.#pcmail.net':25
  • '19#.#6.146.42':426
  • 'ma#####ont1.tctwest.net':25
TCP
HTTP GET requests
  • http://www.google.com/
Other
  • 'de###twax.ru':443
  • 'mx##.###us-vadesecure.net':25
  • 'al######x-vip2.prodigy.net':25
  • 'eu#.###.#rotection.outlook.com':25
  • 'mx#.##ailsrvr.com':25
  • 'kr.##upert.com':443
  • 'sm##.##broadband.co.uk':25
  • '95.##6.195.92':426
  • '19#.#6.146.42':426
  • '5.##.37.41':426
  • 'sp###.#ail.gandi.net':25
  • '21#.#27.140.23':426
  • '19#.#6.146.41':426
  • 'sm#####.iomartmail.com':25
  • 'mt##.##0.yahoodns.net':25
  • 'mx#.##tsolmail.net':25
  • 'mx###.##stedmxserver.com':25
  • 'al######x-vip1.prodigy.net':25
  • 'mx####.##il.gm0.yahoodns.net':25
  • 'fa###ool.xyz':10060
  • 'de###twax.ru':482
  • '19#.#6.146.43':426
  • 'ma#####ont1.tctwest.net':25
UDP
  • DNS ASK mi##########m.mail.protection.outlook.com
  • DNS ASK ya##o.com
  • DNS ASK pi##m.net
  • DNS ASK ma##15.com
  • DNS ASK am##l.com
  • DNS ASK em##.freenet.de
  • DNS ASK fr##net.de
  • DNS ASK ne##sc.com
  • DNS ASK ju####.prometheusx.pl
  • DNS ASK
  • DNS ASK mx.##a.untd.com
  • DNS ASK al######x-vip2.prodigy.net
  • DNS ASK pa##ell.net
  • DNS ASK eu#.###.#rotection.outlook.com
  • DNS ASK li#e.de
  • DNS ASK mx#.##ailsrvr.com
  • DNS ASK he###kitty.com
  • DNS ASK kr.##upert.com
  • DNS ASK ma####lay24.usz.ch
  • DNS ASK ne##ero.net
  • DNS ASK g-##il.com
  • DNS ASK yl##o.com
  • DNS ASK an####.prometheusx.pl
  • DNS ASK mx##.##il.icloud.com
  • DNS ASK ic##ud.com
  • DNS ASK sb###hoo.com
  • DNS ASK ma##.zwave.com
  • DNS ASK lo#.com
  • DNS ASK co###geclub.com
  • DNS ASK sp###.#ail.gandi.net
  • DNS ASK ra###rano.fr
  • DNS ASK li#e.be
  • DNS ASK mx.###intpcs.com
  • DNS ASK sp###tpcs.com
  • DNS ASK mx.####dom-graphics.com
  • DNS ASK fr#####-graphics.com
  • DNS ASK mx.#####.#e.cust.b.hostedemail.com
  • DNS ASK ly##s.de
  • DNS ASK ep##t.de
  • DNS ASK gm##i.com
  • DNS ASK mx##.###us-vadesecure.net
  • DNS ASK pe###epc.com
  • DNS ASK us#.ch
  • DNS ASK tc##est.net
  • DNS ASK mx###.upcmail.net
  • DNS ASK el###.#rometheusx.pl
  • DNS ASK 19#.###.211.95.in-addr.arpa
  • DNS ASK ma#######xcite.roc2.bluetie.com
  • DNS ASK ex##te.com
  • DNS ASK mx##.mail.com
  • DNS ASK ma##.com
  • DNS ASK fa###ool.xyz
  • DNS ASK mx####.##il.gm0.yahoodns.net
  • DNS ASK 19#.###.#11.95.cbl.abuseat.org
  • DNS ASK my##ace.com
  • DNS ASK ve##zon.net
  • DNS ASK at#.net
  • DNS ASK 19#.###.##1.95.sbl-xbl.spamhaus.org
  • DNS ASK mx###.##stedmxserver.com
  • DNS ASK 19#.###.#11.95.zen.spamhaus.org
  • DNS ASK 19#.###.#11.95.bl.spamcop.net
  • DNS ASK to####.prometheusx.pl
  • DNS ASK 19#.###.#11.95.dnsbl.sorbs.net
  • DNS ASK de###twax.ru
  • DNS ASK al######x-vip1.prodigy.net
  • DNS ASK in###htbb.com
  • DNS ASK mx.####ght.synacor.com
  • DNS ASK ro###bum.com
  • DNS ASK google.com
  • DNS ASK ja###.#rometheusx.pl
  • DNS ASK mx##.#ail.citi.com
  • DNS ASK ci##.com
  • DNS ASK mx##.#pcmail.net
  • DNS ASK ka##lbw.de
  • DNS ASK sm##.##broadband.co.uk
  • DNS ASK my####office.co.uk
  • DNS ASK sm#####.iomartmail.com
  • DNS ASK se###p.co.uk
  • DNS ASK sh########l.mx.a.cloudfilter.net
  • DNS ASK sh#w.ca
  • DNS ASK mt##.##0.yahoodns.net
  • DNS ASK ro###tmail.com
  • DNS ASK cx#.##.#.cloudfilter.net
  • DNS ASK co#.net
  • DNS ASK mx#.#omcast.net
  • DNS ASK co##ast.net
  • DNS ASK mx#.##tsolmail.net
  • DNS ASK ch##lo.at
  • DNS ASK ma#####ont1.tctwest.net
Miscellaneous
Creates and executes the following
  • '%WINDIR%\syswow64\dndykyaz\ejfxvyk.exe' /d"<Full path to file>"
  • '%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\dndykyaz\' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\ejfxvyk.exe" %WINDIR%\SysWOW64\dndykyaz\' (with hidden window)
  • '%WINDIR%\syswow64\sc.exe' create dndykyaz binPath= "%WINDIR%\SysWOW64\dndykyaz\ejfxvyk.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
  • '%WINDIR%\syswow64\sc.exe' description dndykyaz "wifi internet conection"' (with hidden window)
  • '%WINDIR%\syswow64\sc.exe' start dndykyaz' (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)
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\dndykyaz\
  • '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\ejfxvyk.exe" %WINDIR%\SysWOW64\dndykyaz\
  • '%WINDIR%\syswow64\sc.exe' create dndykyaz binPath= "%WINDIR%\SysWOW64\dndykyaz\ejfxvyk.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"
  • '%WINDIR%\syswow64\sc.exe' description dndykyaz "wifi internet conection"
  • '%WINDIR%\syswow64\sc.exe' start dndykyaz
  • '%WINDIR%\syswow64\svchost.exe'
  • '%WINDIR%\syswow64\svchost.exe' -o fastpool.xyz:10060 -u 9rLbTvsApFs3i3ojk5hDKicMNRQbxxFGwJA2hNC6NoZZDQN5tTFbhviFm4W3koxSrPg87Lnif7qxFYh9xpTJz1cT6B17Ph4.50000 -p x -k -a cn/half

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.
  2. 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.
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After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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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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