ThreatExpert Report: Trojan.Win32.Qhost.mbi

Submission Summary:

Submission details:

Submission received: 28 November 2009, 19:32:37
Processing time: 6 min 5 sec
Submitted sample:

File MD5: 0x1975720740727F9F670BDEBA7477ABBD
File SHA-1: 0xA14171D436C5A654F9180D24B27C50258C444E85
Filesize: 59,904 bytes

Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%ProgramFiles%\Common Files\keylog.txt	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
2	%System%\drivers\etc\host	14,156 bytes	MD5: 0x67D164A444C62E31F388140E30A2FAB9 SHA-1: 0x7C084F66509293EDC366A9FDB3B12F4A9A23D71C	Trojan.Win32.Qhost.mbi [Kaspersky Lab]
3	%System%\ntfs_ext7.exe [file and pathname of the sample #1]	59,904 bytes	MD5: 0x1975720740727F9F670BDEBA7477ABBD SHA-1: 0xA14171D436C5A654F9180D24B27C50258C444E85	(not available)

Notes:

%ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.
%System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

Memory Modifications

There were new memory pages created in the address space of the system process(es):

Process Name	Process Filename	Allocated Size
services.exe	%System%\services.exe	118,784 bytes
services.exe	%System%\services.exe	118,784 bytes
services.exe	%System%\services.exe	118,784 bytes

Registry Modifications

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]

NTFS_ext_drv = "\\?\globalroot%System%\ntfs_ext7.exe"

so that ntfs_ext7.exe runs every time Windows starts

[HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings]

ProxyEnable = 0x00000000

The following Registry Value was modified:

[HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]

Cookies =
History =

Other details

There was registered attempt to establish connection with the remote host. The connection details are:

Remote Host	Port Number
210.51.166.206	80

The data identified by the following URL was then requested from the remote web server:

http://premiumbullets.cn/knock.php?id=SYSTEM!COMPUTERNAME!00CD1A40

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