Submission Summary:

• Submission details:
• Submission received: 18 February 2009, 10:13:10
• Processing time: 5 min 51 sec
• Submitted sample:
• File MD5: 0x9B467BDC6DD1B3E68651B7039CD373C8
• File SHA-1: 0xD1C9C8D241EE6A5D3DCFE5E5935B4B5822BB9E75
• Filesize: 56,320 bytes
• Alias:
• Infostealer [Symantec]
• Trojan-Spy.Win32.Zbot.gix [Kaspersky Lab]
• PWS-Zbot.gen.c [McAfee]
• Mal/EncPk-GS, Mal/EncPk-FW [Sophos]
• TrojanSpy:Win32/Zbot.gen!C [Microsoft]
• Trojan-Spy.Win32.Zbot [Ikarus]

• Summary of the findings:

What's been found	Severity Level
Threat characteristics of ZBot - a banking trojan that disables firewall, steals sensitive financial data (credit card numbers, online banking login details), makes screen snapshots, downloads additional components, and provides a hacker with the remote access to the compromised system.
Downloads/requests other files from Internet.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

• Attention! Characteristics of the following security risk was identified in the system:

Security Risk	Description
Trojan-Spy.Zbot.YETH	Trojan-Spy.Zbot.YETH is a rootkit trojan which steals online banking information and downloads other malware as well.

• Attention! The following threat categories were identified:

Threat Category	Description
	A keylogger program that can capture all user keystrokes (including confidential details such username, password, credit card number, etc.)
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment
	A malicious backdoor trojan that runs in the background and allows remote access to the compromised system

File System Modifications

• The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	[file and pathname of the sample #1]	56,320 bytes	MD5: 0x9B467BDC6DD1B3E68651B7039CD373C8 SHA-1: 0xD1C9C8D241EE6A5D3DCFE5E5935B4B5822BB9E75	Infostealer [Symantec] Trojan-Spy.Win32.Zbot.gix [Kaspersky Lab] PWS-Zbot.gen.c [McAfee] Mal/EncPk-GS, Mal/EncPk-FW [Sophos] TrojanSpy:Win32/Zbot.gen!C [Microsoft] Trojan-Spy.Win32.Zbot [Ikarus]
2	%System%\twain_32\local.ds	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
3	%System%\twain_32\user.ds	109 bytes	MD5: 0xF3582B49A397FCEC39711416F0857D93 SHA-1: 0xC6955D7751C0FDBEACA64C02B65026F545860547	(not available)
4	%System%\twext.exe	336,384 bytes	MD5: 0x65A4DFCF1475953C1042C6B29EFEC6F9 SHA-1: 0x61A6675DFE15167F58C448C2A8DF6255850E5F0A	Infostealer [Symantec] Trojan-Spy.Win32.Zbot.glb [Kaspersky Lab] PWS-Zbot.gen.c [McAfee] Mal/EncPk-GS, Mal/EncPk-FW [Sophos] TrojanSpy:Win32/Zbot.gen!C [Microsoft]

• 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).

• The following directory was created:
• %System%\twain_32

Memory Modifications

• There was a new process created in the system:

• 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	4,096 bytes
lsass.exe	%System%\lsass.exe	4,096 bytes
svchost.exe	%System%\svchost.exe	4,096 bytes
svchost.exe	%System%\svchost.exe	4,096 bytes
svchost.exe	%System%\svchost.exe	4,096 bytes
svchost.exe	%System%\svchost.exe	4,096 bytes
alg.exe	%System%\alg.exe	4,096 bytes

Registry Modifications

• The following Registry Keys were created:
• HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{43BF8CD1-C5D5-2230-7BB2-98F22C2B7DC6}
• HKEY_USERS\.DEFAULT\Software\Microsoft\Protected Storage System Provider

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Network]
• UID = "%ComputerName%_0003AD77"
• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{43BF8CD1-C5D5-2230-7BB2-98F22C2B7DC6}]
• {F710FA10-2031-3106-8872-93A2B5C5C620} = F7 09 F2 0D
• {E716FA10-2031-AA96-8E72-93A205C5C62C} = 47 09 F2 0D
• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
• ProxyEnable = 0x00000000

• The following Registry Values were modified:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
• Directory = "%Profiles%\LocalService\Local Settings\Temporary Internet Files\Content.IE5"
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
• CachePath = "%Profiles%\LocalService\Local Settings\Temporary Internet Files\Content.IE5\Cache1"
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
• CachePath = "%Profiles%\LocalService\Local Settings\Temporary Internet Files\Content.IE5\Cache2"
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
• CachePath = "%Profiles%\LocalService\Local Settings\Temporary Internet Files\Content.IE5\Cache3"
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
• CachePath = "%Profiles%\LocalService\Local Settings\Temporary Internet Files\Content.IE5\Cache4"
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
• Userinit = "%System%\userinit.exe,%System%\twext.exe,"

so that twext.exe runs every time Windows starts

• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
• Cookies = "%Profiles%\LocalService\Cookies"
• History = "%Profiles%\LocalService\Local Settings\History"

Other details

• To mark the presence in the system, the following Mutex object was created:
• __SYSTEM__91C38905__

• The following Internet Connection was established:

• The following GET request was made:
• mx1/mx.for