Submission Summary:

• Submission details:
• Submission received: 8 November 2009, 21:07:34
• Processing time: 5 min 11 sec
• Submitted sample:
• File MD5: 0xD12DF2C6FF4D766A5A6C3EA39F6FD1F5
• File SHA-1: 0x8341C529C4B0EF5334493A8ADAE5383288C4054B
• Filesize: 62,464 bytes
• Alias:
• HeurEngine.MaliciousPacker [PCTools]
• Packed.Generic.232 [Symantec]
• Mal/Zbot-O [Sophos]
• PWS:Win32/Zbot.PG [Microsoft]
• Win-Trojan/ZBot.62464.C [AhnLab]

• 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]	62,464 bytes	MD5: 0xD12DF2C6FF4D766A5A6C3EA39F6FD1F5 SHA-1: 0x8341C529C4B0EF5334493A8ADAE5383288C4054B	HeurEngine.MaliciousPacker [PCTools] Packed.Generic.232 [Symantec] Mal/Zbot-O [Sophos] PWS:Win32/Zbot.PG [Microsoft] Win-Trojan/ZBot.62464.C [AhnLab]
2	%System%\sdra64.exe	390,656 bytes	MD5: 0x1084586F1931D375F112DE26B8D381AB SHA-1: 0xBF68A7210A7C292FADD765CF01441CE4170E4505	HeurEngine.MaliciousPacker [PCTools] Packed.Generic.232 [Symantec] Mal/Zbot-O [Sophos] PWS:Win32/Zbot.PG [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).

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

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

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	90,112 bytes
lsass.exe	%System%\lsass.exe	90,112 bytes
svchost.exe	%System%\svchost.exe	90,112 bytes
svchost.exe	%System%\svchost.exe	90,112 bytes
svchost.exe	%System%\svchost.exe	90,112 bytes
svchost.exe	%System%\svchost.exe	90,112 bytes
svchost.exe	%System%\svchost.exe	90,112 bytes
alg.exe	%System%\alg.exe	90,112 bytes

Registry Modifications

• The following Registry Keys were created:
• HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{334613DB-50C1-B3BE-95ED-E9915A134FF1}
• 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%_0001BAA0"
• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\{334613DB-50C1-B3BE-95ED-E9915A134FF1}]
• {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\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 =
• [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
• Cookies =
• History =

Other details

• To mark the presence in the system, the following Mutex objects were created:
• 928EE32E01CA60FA000000982
• _AVIRA_21099

• The following GET request was made:
• s2/non.bin

• The data identified by the following URLs was then requested from the remote web server:
• http://forum77.cn/s2/non.bin
• http://forum77.cn/s2/ip.php