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Short description
Win32/Ghodow.NAG is a trojan that changes the home page of certain web browsers. Win32/Ghodow.NAG replaces the original MBR (Master Boot Record) of the hard disk drive with its own program code. It uses techniques common for rootkits.Installation
When executed, the trojan creates the following files:- C:\smsc.exe (57856 B)
- C:\mb.exe (84992 B)
- C:\alg.exe (57856 B)
- %system%\hello_tt.sys (6656 B)
- %appdata%\Microsoft\Internet Explorer\Quick
Launch\Internet Explorer.IE - %desktop%\Internet Explorer.IE
- %commonvideo%\PulgFile.log
- %commonvideo%\al.ini
- hello_tt
- [HKEY_LOCAL_MACHINE\SOFTWARE\Windows\CurrentVersion\
Run]
"Alg" = "C:\alg.exe"
- ntldr
- ntkrnlpa.exe
- beep.sys
- [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2559a1f4-21d7-11d4-bdaf-00c04f60b9f0}\
shell\OpenHomePage\Command]
"(Default)" = "%programfiles%\Internet
Explorer\iexplore.exe http://123.765%removed%.info" - [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\
shell\OpenHomePage\Command]
"(Default)" = "%programfiles%\Internet
Explorer\iexplore.exe http://123.765%removed%.info" - [HKEY_CLASSES_ROOT\CLSID\{2559a1f4-21d7-11d4-bdaf-00c04f60b9f0}\
shell\OpenHomePage\Command]
"(Default)" = "%programfiles%\Internet
Explorer\iexplore.exe http://123.765%removed%.info"
- [HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\
Explorer\Desktop\NameSpace\{C42EB5A1-0EED-E549-91B0-153485866016}] - [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
Explorer\Desktop\NameSpace\{20000000-0000-0000-0000-000000000000}] - [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
Explorer\Desktop\NameSpace\{1f4de370-d627-11d1-ba4f-00a0c91eedba}] - [HKEY_CLASSES_ROOT\CLSID\{e17d4fc0-5564-11d1-83f2-00a0c90dc850}]
Other information
The trojan acquires data and commands from a remote computer or the Internet.The trojan contains a list of (3) URLs. The HTTP protocol is used.
It may perform the following actions:
- download files from a remote computer and/or the Internet
- run executable files
- open a specific URL address
- collect information about the operating system used
- send gathered information
- update itself to a newer version