Submission Summary:

• Submission details:
• Submission received: 20 January 2009, 10:35:17
• Processing time: 7 min 20 sec
• Submitted sample:
• File MD5: 0xEEF4CF9B4FC936ADEB5DEA03562FADDD
• File SHA-1: 0x15513F809923BA83A5C689CD0782891E3A17D194
• Filesize: 84,486 bytes
• Alias & packer info:
• Infostealer [Symantec]
• Trojan-Dropper.Win32.Pincher [Ikarus]
• packed with: PE_Patch.UPX [Kaspersky Lab]

• 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]	84,486 bytes	MD5: 0xEEF4CF9B4FC936ADEB5DEA03562FADDD SHA-1: 0x15513F809923BA83A5C689CD0782891E3A17D194	Infostealer [Symantec] Trojan-Dropper.Win32.Pincher [Ikarus] packed with PE_Patch.UPX [Kaspersky Lab]
2	%System%\twain32\local.ds	2,425 bytes	MD5: 0x774022671FFC0A78BFB69E74026DE13F SHA-1: 0x9A5CCC0C1CF9FCB6411234E15C8C3C3D41A43473	(not available)
3	%System%\twain32\user.ds	0 bytes	MD5: 0xD41D8CD98F00B204E9800998ECF8427E SHA-1: 0xDA39A3EE5E6B4B0D3255BFEF95601890AFD80709	(not available)
4	%System%\twex.exe	161,286 bytes	MD5: 0x4E02AF016539E7BD0F2758BFC1ABCDC2 SHA-1: 0xC492BE0C4FA1A5351DF1136B2D648B998256F01E	Infostealer [Symantec] Trojan-Dropper.Win32.Pincher [Ikarus] packed with PE_Patch.UPX [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).

• The following directory was created:
• %System%\twain32

Memory Modifications

• There was a new memory page created in the address space of the system process(es):

Process Name	Process Filename	Allocated Size
svchost.exe	%System%\svchost.exe	45,056 bytes

Registry Modifications

• The following Registry Keys were created:
• HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{19127AD2-394B-70F5-C650-B97867BAA1F7}
• 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%_0039F5A5"
• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{19127AD2-394B-70F5-C650-B97867BAA1F7}]
• {23343233-2C66-3B33-3432-343233343233} = F8 0A F4 0E
• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{43BF8CD1-C5D5-2230-7BB2-98F22C2B7DC6}]
• {3039636B-5F3D-6C64-6675-696870667265} = F7 09 F2 0D
• {33373039-3132-3864-6B30-303233343434} = 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 NT\CurrentVersion\Winlogon]
• Userinit = "%System%\userinit.exe,%System%\twex.exe,"

so that twex.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

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

• The data identified by the following URLs was then requested from the remote web server:
• http://www.rusibank.com/jfdgdfvvvvvvsdgf.bin
• http://www.wmtop100.com/qazwsxedcrfvtgb/zaqxswcdevfr.php