Technical Information
To ensure autorun and distribution:
Creates the following files on removable media:
- <Drive name for removable media>:\Sys.exe
- <Drive name for removable media>:\autorun.inf
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Executes the following:
- '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe' /stext "%TEMP%\holderwb.txt"
- '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe' /stext "%TEMP%\holdermail.txt"
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\Microsoft\IdentityCRL]
- [<HKCU>\Software\Microsoft\MSNMessenger]
- [<HKCU>\Software\Microsoft\Internet Explorer\IntelliForms\Storage2]
- [<HKCU>\Software\Microsoft\Windows Live Mail]
- [<HKCU>\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts]
- [<HKCU>\Software\Microsoft\Internet Account Manager\Accounts]
- [<HKCU>\Identities\{5518F2FB-DB74-45A3-BEC1-4575D8D9DC84}\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts]
- [<HKCU>\Identities\{5518F2FB-DB74-45A3-BEC1-4575D8D9DC84}\Software\Microsoft\Internet Account Manager\Accounts]
Modifies file system:
Creates the following files:
- %TEMP%\CabD.tmp
- %TEMP%\CabB.tmp
- %TEMP%\Cab9.tmp
- %APPDATA%\pid.txt
- %TEMP%\holderwb.txt
- %TEMP%\holdermail.txt
- %APPDATA%\pidloc.txt
- %TEMP%\Cab7.tmp
- %APPDATA%\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
- %APPDATA%\Microsoft\CryptnetUrlCache\Content\2BF68F4714092295550497DD56F57004
- %APPDATA%\Microsoft\CryptnetUrlCache\MetaData\2BF68F4714092295550497DD56F57004
- %APPDATA%\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
- %TEMP%\Cab5.tmp
- %TEMP%\Cab3.tmp
- %TEMP%\Cab1.tmp
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\Sys.exe
- <Drive name for removable media>:\autorun.inf
Deletes the following files:
- %TEMP%\CabD.tmp
- %TEMP%\CabB.tmp
- %TEMP%\holderwb.txt
- %TEMP%\holdermail.txt
- %TEMP%\Cab9.tmp
- %TEMP%\Cab3.tmp
- %TEMP%\Cab1.tmp
- %TEMP%\Cab7.tmp
- %TEMP%\Cab5.tmp
Network activity:
Connects to:
- 'wh#####yipaddress.com':80
- 'ma##.##forwarders.com':587
- 'wp#d':80
- 'www.download.windowsupdate.com':80
TCP:
HTTP GET requests:
- http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
- http://wh#####yipaddress.com/
- http://11#.#11.111.1/wpad.dat via wp#d
- http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootseq.txt
UDP:
- DNS ASK wh#####yipaddress.com
- DNS ASK ma##.##forwarders.com
- DNS ASK wp#d
- DNS ASK www.download.windowsupdate.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
