Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows Update' = '%APPDATA%\WindowsUpdate.exe'
Creates or modifies the following files
- %APPDATA%\microsoft\windows\start menu\programs\startup\filename.vbs
Malicious functions
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Injects code into
the following system processes:
- %WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe
Searches for registry branches where third party applications store passwords
- [HKCU\Software\Google\Google Talk\Accounts]
- [HKCU\Software\Microsoft\Internet Account Manager\Accounts]
- [HKCU\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts]
- [HKCU\Identities\{1BBA5DCD-58F3-46AE-861D-68CF42722C36}\Software\Microsoft\Internet Account Manager\Accounts]
- [HKCU\Identities\{1BBA5DCD-58F3-46AE-861D-68CF42722C36}\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts]
- [HKCU\Software\Microsoft\MSNMessenger]
- [HKCU\Software\Yahoo\Pager]
- [HKCU\Software\Microsoft\IdentityCRL]
- [HKCU\Software\Microsoft\Windows Live Mail]
Modifies file system
Creates the following files
- %APPDATA%\subfolder\filename.exe
- %APPDATA%\pid.txt
- %APPDATA%\pidloc.txt
- %APPDATA%\windowsupdate.exe
Network activity
Connects to
- 'wh#####yipaddress.com':80
- 'wh#####yipaddress.com':443
TCP
HTTP GET requests
- http://wh#####yipaddress.com/
Other
- 'wh#####yipaddress.com':443
UDP
- DNS ASK wh#####yipaddress.com
Miscellaneous
Restarts the analyzed sample
Executes the following
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /stext "%TEMP%\holdermail.txt"
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /stext "%TEMP%\holderwb.txt"
