Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- %LOCALAPPDATA%\start\update_backup.exe
- %LOCALAPPDATA%\start\rcxaf4d.tmp
Infects the following executable files
- <Drive name for removable media>:\calc_backup.exe
Creates the following files on removable media
- <Drive name for removable media>:\bloc-notes.exe
- <Drive name for removable media>:\calc_backup.exe
- <Drive name for removable media>:\rcx97c9.tmp
Malicious functions
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
- file extensions
Modifies file system
Creates the following files
- %TEMP%\yxxb.resources
- %TEMP%\vug0ykdu.out
- %TEMP%\vug0ykdu.cmdline
- %TEMP%\vug0ykdu.0.vb
- %TEMP%\fdymdby.resources
- %TEMP%\yuzue.resources
- %TEMP%\windowsupdate.ico
- %TEMP%\resac60.tmp
- %TEMP%\vbcac3f.tmp
- %TEMP%\tu7mh9f1.out
- %TEMP%\tu7mh9f1.cmdline
- %TEMP%\tu7mh9f1.0.vb
- %TEMP%\whatdafock.txt
- %TEMP%\pboux.resources
- %TEMP%\st.resources
- %TEMP%\m5hst9gs.exe
- %TEMP%\resa6f1.tmp
- %TEMP%\vbca6f0.tmp
- %TEMP%\m5hst9gs.out
- %TEMP%\m5hst9gs.cmdline
- %TEMP%\m5hst9gs.0.vb
- %TEMP%\msnpsharp.dll
- %TEMP%\n5up8.resources
- %LOCALAPPDATA%\start\update.exe
- %TEMP%\svchost.exe
- %TEMP%\update.exe
- %TEMP%\vbc9577.tmp
- %TEMP%\res95a6.tmp
Deletes the following files
- %TEMP%\resa6f1.tmp
- %TEMP%\vug0ykdu.0.vb
- %TEMP%\vug0ykdu.out
- %TEMP%\vug0ykdu.cmdline
- %TEMP%\vbc9577.tmp
- %TEMP%\res95a6.tmp
- %LOCALAPPDATA%\start\update.exe
- %TEMP%\windowsupdate.ico
- %TEMP%\pboux.resources
- %TEMP%\st.resources
- %TEMP%\tu7mh9f1.cmdline
- %TEMP%\tu7mh9f1.out
- %TEMP%\tu7mh9f1.0.vb
- %TEMP%\vbcac3f.tmp
- %TEMP%\resac60.tmp
- %TEMP%\m5hst9gs.0.vb
- %TEMP%\m5hst9gs.out
- %TEMP%\m5hst9gs.exe
- %TEMP%\m5hst9gs.cmdline
- %TEMP%\vbca6f0.tmp
- %TEMP%\yuzue.resources
- %TEMP%\fdymdby.resources
Substitutes the following executable files
- <Drive name for removable media>:\calc.exe
Substitutes the following files
- %TEMP%\windowsupdate.ico
Network activity
Connects to
- '17#.#3.169.14':80
Miscellaneous
Creates and executes the following
- '%TEMP%\update.exe'
- '%TEMP%\svchost.exe'
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\m5hst9gs.cmdline"' (with hidden window)
- '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESA6F1.tmp" "%TEMP%\vbcA6F0.tmp"' (with hidden window)
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\tu7mh9f1.cmdline"' (with hidden window)
- '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESAC60.tmp" "%TEMP%\vbcAC3F.tmp"' (with hidden window)
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\vug0ykdu.cmdline"' (with hidden window)
- '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES95A6.tmp" "%TEMP%\vbc9577.tmp"' (with hidden window)
Executes the following
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\m5hst9gs.cmdline"
- '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESA6F1.tmp" "%TEMP%\vbcA6F0.tmp"
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\tu7mh9f1.cmdline"
- '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RESAC60.tmp" "%TEMP%\vbcAC3F.tmp"
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\vug0ykdu.cmdline"
- '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES95A6.tmp" "%TEMP%\vbc9577.tmp"
