Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [HKLM\Software\Classes\BlackBit\shell\open\command] '' = '%ALLUSERSPROFILE%\j3kebxda.exe "%l" '
Creates or modifies the following files
- %APPDATA%\microsoft\windows\start menu\programs\startup\winlogon.exe
- %APPDATA%\microsoft\windows\start menu\programs\startup\wvtymcow.bat
- <SYSTEM32>\tasks\blackbit
Sets the following service settings
- [HKLM\System\CurrentControlSet\Services\IKEEXT] 'Start' = '00000002'
Creates the following files on removable media
- <Drive name for removable media>:\cpriv.blackbit
- <Drive name for removable media>:\restore-my-files.txt
Malicious functions
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
- Windows Defender
deletes volume shadow copies.
Executes the following
- '%WINDIR%\syswow64\netsh.exe' firewall set opmode mode=disable
- '%WINDIR%\syswow64\netsh.exe' advfirewall set currentprofile state off
Reads files which store third party applications passwords
- %HOMEPATH%\desktop\1189.jpeg
- %HOMEPATH%\desktop\ovp25012015.doc
- %HOMEPATH%\desktop\lisp_success.doc
- %HOMEPATH%\desktop\issi2013_template_for_posters.docx
- %HOMEPATH%\desktop\iisstart.html
- %HOMEPATH%\desktop\fi51.doc
- %HOMEPATH%\desktop\dialmap.bmp
- %HOMEPATH%\desktop\dial.bmp
- %HOMEPATH%\desktop\dashborder_144.bmp
- %HOMEPATH%\desktop\dashborder_120.bmp
- %HOMEPATH%\desktop\cveuropeo.doc
- %HOMEPATH%\desktop\contosoroot_1.cer
- %HOMEPATH%\desktop\coffee.bmp
- %HOMEPATH%\desktop\browse.html
- %HOMEPATH%\desktop\aoc_saq_d_v3_merchant.docx
- %HOMEPATH%\desktop\alert.html
- %HOMEPATH%\desktop\alert.htm
- %HOMEPATH%\desktop\adhd_and_obesity.docx
- %HOMEPATH%\desktop\64bit_notes.htm
- %HOMEPATH%\desktop\4f0bf7ff71f28.jpg
- %HOMEPATH%\desktop\4f0bf7ff71f28.jpeg
- %HOMEPATH%\desktop\3.jpeg
- %HOMEPATH%\desktop\210252809.jpeg
- %HOMEPATH%\desktop\168.jpg
- %HOMEPATH%\desktop\13.jpeg
- %HOMEPATH%\desktop\1189.jpg
- %HOMEPATH%\desktop\sdszfo.docx
- %HOMEPATH%\desktop\toolbar.bmp
Modifies file system
Creates the following files
- %APPDATA%\winlogon.exe
- C:\users\public\music\sample music\restore-my-files.txt
- C:\users\public\pictures\restore-my-files.txt
- C:\users\public\pictures\sample pictures\restore-my-files.txt
- C:\users\public\recorded tv\restore-my-files.txt
- C:\users\public\recorded tv\sample media\restore-my-files.txt
- C:\users\public\videos\restore-my-files.txt
- C:\users\public\videos\sample videos\restore-my-files.txt
- C:\users\public\restore-my-files.txt
- %HOMEPATH%\contacts\restore-my-files.txt
- %HOMEPATH%\desktop\restore-my-files.txt
- %HOMEPATH%\documents\restore-my-files.txt
- %HOMEPATH%\downloads\restore-my-files.txt
- %HOMEPATH%\favorites\restore-my-files.txt
- %HOMEPATH%\favorites\links\restore-my-files.txt
- %HOMEPATH%\favorites\links for united states\restore-my-files.txt
- %HOMEPATH%\favorites\microsoft websites\restore-my-files.txt
- %HOMEPATH%\favorites\msn websites\restore-my-files.txt
- %HOMEPATH%\favorites\windows live\restore-my-files.txt
- %HOMEPATH%\links\restore-my-files.txt
- %HOMEPATH%\music\restore-my-files.txt
- %HOMEPATH%\pictures\restore-my-files.txt
- %HOMEPATH%\saved games\restore-my-files.txt
- %HOMEPATH%\searches\restore-my-files.txt
- %HOMEPATH%\videos\restore-my-files.txt
- %HOMEPATH%\restore-my-files.txt
- C:\users\public\music\restore-my-files.txt
- C:\kms\restore-my-files.txt
- C:\users\public\libraries\restore-my-files.txt
- C:\users\public\documents\restore-my-files.txt
- %ALLUSERSPROFILE%\winlogon.exe
- %ALLUSERSPROFILE%\microsoft\windows\start menu\programs\startup\winlogon.exe
- %WINDIR%\winlogon.exe
- %TEMP%\5m3o1cpu.ico
- %TEMP%\ghlryrzo.0.cs
- %TEMP%\ghlryrzo.cmdline
- %TEMP%\ghlryrzo.out
- %ALLUSERSPROFILE%\cscd393.tmp
- %TEMP%\resd394.tmp
- %ALLUSERSPROFILE%\j3kebxda.exe
- %ALLUSERSPROFILE%\info.blackbit
- C:\cpriv.blackbit
- D:\cpriv.blackbit
- %HOMEPATH%\favorites\cpriv.blackbit
- %APPDATA%\microsoft\windows\recent\cpriv.blackbit
- %HOMEPATH%\desktop\cpriv.blackbit
- %HOMEPATH%\documents\cpriv.blackbit
- %HOMEPATH%\pictures\cpriv.blackbit
- %HOMEPATH%\videos\cpriv.blackbit
- %HOMEPATH%\music\cpriv.blackbit
- %ALLUSERSPROFILE%\cpriv.blackbit
- C:\restore-my-files.txt
- D:\restore-my-files.txt
- C:\users\default\restore-my-files.txt
- C:\users\public\desktop\restore-my-files.txt
- C:\users\public\downloads\restore-my-files.txt
- C:\msocache\all users\{90140000-0011-0000-1000-0000000ff1ce}-c\restore-my-files.txt
Sets the 'hidden' attribute to the following files
- %APPDATA%\winlogon.exe
- %ALLUSERSPROFILE%\winlogon.exe
- %WINDIR%\winlogon.exe
- %ALLUSERSPROFILE%\j3kebxda.exe
Deletes the following files
- %TEMP%\resd394.tmp
- %ALLUSERSPROFILE%\cscd393.tmp
- %TEMP%\ghlryrzo.cmdline
- %TEMP%\ghlryrzo.0.cs
- %TEMP%\ghlryrzo.out
Modifies the following files
- D:\install.log
- C:\users\public\pictures\sample pictures\hydrangeas.jpg
- C:\users\public\pictures\sample pictures\desktop.ini
- C:\users\public\pictures\sample pictures\desert.jpg
- C:\users\public\pictures\sample pictures\chrysanthemum.jpg
- C:\users\public\pictures\desktop.ini
- C:\users\public\music\sample music\sleep away.mp3
- C:\users\public\music\sample music\maid with the flaxen hair.mp3
- C:\users\public\music\sample music\kalimba.mp3
- C:\users\public\music\sample music\desktop.ini
- C:\users\public\music\desktop.ini
- C:\users\public\libraries\recordedtv.library-ms
- C:\users\public\libraries\desktop.ini
- C:\users\public\downloads\desktop.ini
- C:\users\public\documents\desktop.ini
- C:\users\public\desktop\steam.lnk
- C:\users\public\desktop\opera.lnk
- C:\users\public\desktop\mozilla thunderbird.lnk
- C:\users\public\desktop\firefox.lnk
- C:\users\public\desktop\desktop.ini
- C:\users\public\desktop\acrobat reader dc.lnk
- C:\users\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000002.regtrans-ms
- C:\users\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000001.regtrans-ms
- C:\users\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tm.blf
- C:\users\default\ntuser.dat.log2
- C:\users\default\ntuser.dat.log1
- C:\users\default\ntuser.dat.log
- C:\users\default\ntuser.dat
- C:\users\public\pictures\sample pictures\jellyfish.jpg
- C:\users\public\pictures\sample pictures\koala.jpg
Modifies multiple files.
Modifies user data files (Trojan.Encoder).
Network activity
Connects to
- '<LOCALNET>.23.1':445
- '<LOCALNET>.23.1':139
UDP
- DNS ASK ap####ation-api.xyz
- 'localhost':63666
- 'localhost':51600
Miscellaneous
Creates and executes the following
- '%WINDIR%\syswow64\cmd.exe' /C schtasks /CREATE /SC ONLOGON /TN BlackBit /TR %APPDATA%\winlogon.exe /RU SYSTEM /RL HIGHEST /F' (with hidden window)
- '%WINDIR%\microsoft.net\framework\v4.0.30319\csc.exe' /noconfig /fullpaths @"%TEMP%\ghlryrzo.cmdline"' (with hidden window)
- '%WINDIR%\microsoft.net\framework\v4.0.30319\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESD394.tmp" "%ALLUSERSPROFILE%\CSCD393.tmp"' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C vssadmin delete shadows /all /quiet' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C wbadmin DELETE SYSTEMSTATEBACKUP' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C wmic shadowcopy delete' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C wbadmin delete catalog -quiet' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} bootstatuspolicy ignoreallfailures' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} recoveryenabled no' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall set currentprofile state off' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C netsh firewall set opmode mode=disable' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\cmd.exe' /C schtasks /CREATE /SC ONLOGON /TN BlackBit /TR %APPDATA%\winlogon.exe /RU SYSTEM /RL HIGHEST /F
- '%WINDIR%\syswow64\schtasks.exe' /CREATE /SC ONLOGON /TN BlackBit /TR %APPDATA%\winlogon.exe /RU SYSTEM /RL HIGHEST /F
- '%WINDIR%\microsoft.net\framework\v4.0.30319\csc.exe' /noconfig /fullpaths @"%TEMP%\ghlryrzo.cmdline"
- '%WINDIR%\microsoft.net\framework\v4.0.30319\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESD394.tmp" "%ALLUSERSPROFILE%\CSCD393.tmp"
- '%WINDIR%\syswow64\cmd.exe' /C vssadmin delete shadows /all /quiet
- '%WINDIR%\syswow64\cmd.exe' /C wbadmin DELETE SYSTEMSTATEBACKUP
- '%WINDIR%\syswow64\cmd.exe' /C wmic shadowcopy delete
- '%WINDIR%\syswow64\cmd.exe' /C wbadmin delete catalog -quiet
- '%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
- '%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} recoveryenabled no
- '%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall set currentprofile state off
- '%WINDIR%\syswow64\cmd.exe' /C netsh firewall set opmode mode=disable
