ThreatExpert Report: Trojan-Downloader.Win32.Negao.ac, Trojan Horse, Mal/Generic-A..

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Submission Summary:

Submission details:

Submission received: 9 July 2009, 08:29:33
Processing time: 7 min 46 sec
Submitted sample:

File MD5: 0xAF50713E6FF1CFC0E190261A48DC8EE2
File SHA-1: 0x6D1B8DCCFC1881B30EEBC68EB18CE9B211F3A498
Filesize: 181,678 bytes
Alias:

Trojan Horse [Symantec]
Trojan-Downloader.Win32.Negao.ac [Kaspersky Lab]
Mal/Generic-A [Sophos]
Trojan-Downloader.Win32.Banload [Ikarus]

Summary of the findings:

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

Technical Details:

Possible Security Risk

Attention! The following threat categories were identified:

Threat Category	Description
	A program that downloads files to the local computer that may represent security risk
	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 file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	[file and pathname of the sample #1]	181,678 bytes	MD5: 0xAF50713E6FF1CFC0E190261A48DC8EE2 SHA-1: 0x6D1B8DCCFC1881B30EEBC68EB18CE9B211F3A498	Trojan Horse [Symantec] Trojan-Downloader.Win32.Negao.ac [Kaspersky Lab] Mal/Generic-A [Sophos] Trojan-Downloader.Win32.Banload [Ikarus]

Memory Modifications

There was a new process created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	57,344 bytes

Other details

The following Internet downloads were started (the retrieved bits are saved into the local file):

URL to be downloaded	Filename for the downloaded bits
http://www.hoje-noticias.pagebr.com/downloads/principal.txt	%System%\process.exe
http://www.hoje-noticias.pagebr.com/downloads/plug2.txt	%System%\wiskyx.exe
http://www.hoje-noticias.pagebr.com/downloads/winsex2.txt	%System%\winsex2.exe

Note:

%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).

Downloaded File Summary:

Download details:

Download retrieved: 9 July 2009 08:37:19
Processing time: 11 min 23 sec
Downloaded sample #1:

File MD5: 0x097FCF4368C94D83563F205CE335F89B
File SHA-1: 0xDF4DCA7ACA30A1BDECDA342A6FE8C3600649F322
Filesize: 3,983,325 bytes
Alias:

Trojan-Banker.Win32.Banker.etk [Kaspersky Lab]
Trojan-Spy.Banker [Ikarus]

Downloaded sample #2:

File MD5: 0x6B88AD201100FE58920842BE576F5482
File SHA-1: 0xAD874D64F5E388A781D809DD5497F56C08D4256B
Filesize: 184,320 bytes
Alias:

Downloaded sample #3:

File MD5: 0x3ABB2F2EDA63E9ED447AAD1E502B5E25
File SHA-1: 0x47B8EDBFE0B92EFF2A70B58C987FAFEFB15EF3F2
Filesize: 2,389,923 bytes
Alias:

Trojan-Banker.Win32.Banbra.lpv [Kaspersky Lab]
Trojan-Banker.Win32.Banbra [Ikarus]

Summary of the findings:

What's been found	Severity Level
Creates a startup registry entry.

Technical Details:

The new window was created, as shown below:

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File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%System%\future.exe	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
2	[file and pathname of the sample #1]	3,983,325 bytes	MD5: 0x097FCF4368C94D83563F205CE335F89B SHA-1: 0xDF4DCA7ACA30A1BDECDA342A6FE8C3600649F322	Trojan-Banker.Win32.Banker.etk [Kaspersky Lab] Trojan-Spy.Banker [Ikarus]
3	[file and pathname of the sample #2]	184,320 bytes	MD5: 0x6B88AD201100FE58920842BE576F5482 SHA-1: 0xAD874D64F5E388A781D809DD5497F56C08D4256B	Mal/Generic-A [Sophos] TrojanSpy:Win32/Banker.HX [Microsoft] Trojan.Banker.Delf [Ikarus] Win-Trojan/Banker.184320.J [AhnLab]
4	[file and pathname of the sample #3]	2,389,923 bytes	MD5: 0x3ABB2F2EDA63E9ED447AAD1E502B5E25 SHA-1: 0x47B8EDBFE0B92EFF2A70B58C987FAFEFB15EF3F2	Trojan-Banker.Win32.Banbra.lpv [Kaspersky Lab] Trojan-Banker.Win32.Banbra [Ikarus]
5	%System%\TS45.SYS	7,168 bytes	MD5: 0xABA452FD10F74AABCAC36B579046EDE8 SHA-1: 0x2005C6BC6AD5A6807D2F5F56D842B0013351F18B	packed with PE_Patch [Kaspersky Lab]

Note:

%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 processes created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	25,059,328 bytes
[filename of the sample #3]	[file and pathname of the sample #3]	7,512,064 bytes
[filename of the sample #2]	[file and pathname of the sample #2]	237,568 bytes

There was a new kernel-mode driver installed in the system:

Driver Name	Driver Filename
Driver	%System%\TS45.sys

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\GbpSv
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\TS45
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\TS45\Security
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\GbpSv
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TS45
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TS45\Security
HKEY_CURRENT_USER\Software\Microsoft\Windows Script
HKEY_CURRENT_USER\Software\Microsoft\Windows Script\Settings
HKEY_CURRENT_USER\future

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system]

EnableLUA = 0x00000000

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

(Default) = "%System%\future.exe"

so that future.exe runs every time Windows starts

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\TS45\Security]

Security = 01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 0

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\TS45]

Type = 0x00000001
Start = 0x00000001
ErrorControl = 0x00000001
ImagePath = "%System%\TS45.sys"
DisplayName = "Driver"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TS45\Security]

Security = 01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 00 04 00 00 00 00 00 14 00 FD 01 02 00 01 01 00 00 00 00 00 05 12 00 00 00 00 00 18 00 FF 01 0F 0

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TS45]

Type = 0x00000001
Start = 0x00000001
ErrorControl = 0x00000001
ImagePath = "%System%\TS45.sys"
DisplayName = "Driver"

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]

[filename of the sample #3] = "[file and pathname of the sample #3]"

so that [file and pathname of the sample #3] runs every time Windows starts

[HKEY_CURRENT_USER\Software\Microsoft\Windows Script\Settings]

JITDebug = 0x00000000

Other details

Analysis of the file resources indicate the following possible country of origin:

Brazil

The following Host Name was requested from a host database:

mensagempravcweb.tempsite.ws

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

Remote Host	Port Number
67.222.96.12	80

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