Submission Summary:

• Submission details:
• Submission received: 12 September 2009, 17:34:23
• Processing time: 6 min 9 sec
• Submitted sample:
• File MD5: 0x6467B3B61045675CFABDB992240DDA80
• File SHA-1: 0xCFB2953591482686971BCB50C9F82B41E32C5C8C
• Filesize: 105,552 bytes
• Alias:
• Trojan.Win32.Antavmu.egh [Kaspersky Lab]
• Mal/Behav-268 [Sophos]
• Trojan.Win32.Antavmu [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.
Stealth-mode characteristics common to Rootkits.
Downloads/requests other files from Internet.
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]	105,552 bytes	MD5: 0x6467B3B61045675CFABDB992240DDA80 SHA-1: 0xCFB2953591482686971BCB50C9F82B41E32C5C8C	Trojan.Win32.Antavmu.egh [Kaspersky Lab] Mal/Behav-268 [Sophos] Trojan.Win32.Antavmu [Ikarus]
2	%System%\twex.exe	247,376 bytes	MD5: 0x74580BE678492681CBF2A92D5CAB9328 SHA-1: 0x435BACBC713144CC1B13BDC3715C981720A5E7AB	Trojan.Win32.Antavmu.egh [Kaspersky Lab] Mal/Behav-268 [Sophos] Trojan.Win32.Antavmu [Ikarus]

• 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).

• Attention! The following hidden files were created in the system:

• Attention! The following hidden directory was created:
• %System%\twain32

Registry Modifications

• The following Registry Keys were created:
• HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{00880030-2D30-302D-3033-330030383030}
• HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{00880032-2D32-302D-3033-330030383030}
• 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%_00027228"
• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{00880030-2D30-302D-3033-330030383030}]
• {00888000-00D3-0098-8800-C0000040D304} = F7 09 F2 0D
• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{00880032-2D32-302D-3033-330030383030}]
• {00888000-00D3-0098-8800-C0000040D304} = FC 0A F4 0E
• [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 =
• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
• Cookies =
• History =

Other details

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

	Taiwan

• To mark the presence in the system, the following Mutex objects were created:
• _H_91C38905_
• 833DDCE001CA3409000005E02

• The following Host Name was requested from a host database:
• microsoft.com

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

• The following Internet Connection was established:

• The following GET request was made:
• zszs/cfg.bin

• The data identified by the following URL was then requested from the remote web server:
• http://www.ihateyoujess.com/zszs/s.php