Submission Summary:

• Submission details:
• Submission received: 3 August 2012, 01:39:30
• Processing time: 8 min 51 sec
• Submitted sample:
• File MD5: 0x34AC3D1AB72E67DF7D60B3BD11604B02
• File SHA-1: 0x3B84B185C1C633FBE8D6A3DE37973214032DE0D5
• Filesize: 192,512 bytes
• Alias:
• Backdoor.Trojan [Symantec]
• Backdoor.Win32.ZAccess.tzs [Kaspersky Lab]
• ZeroAccess.fe [McAfee]
• Troj/ZAccess-CH [Sophos]
• Trojan:Win32/Sirefef.P [Microsoft]
• Backdoor.Win32.ZAccess [Ikarus]

• Summary of the findings:

What's been found	Severity Level
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

• Attention! The following threat categories were identified:

Threat Category	Description
	A malicious backdoor trojan that runs in the background and allows remote access to the compromised system
	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 files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%AppData%\{cbf70787-72f9-b6ef-7e3c-8c19ccb74892}\@ %Windir%\Installer\{cbf70787-72f9-b6ef-7e3c-8c19ccb74892}\@	2,048 bytes	MD5: 0x08E2393DB3ADD25618899CE6B3037495 SHA-1: 0x0B7F5F059A7A03E5B1D2C42A2B6CC368C3FB5614	Mal/ZAccConf-A [Sophos]
2	%AppData%\{cbf70787-72f9-b6ef-7e3c-8c19ccb74892}\n %Windir%\Installer\{cbf70787-72f9-b6ef-7e3c-8c19ccb74892}\n	48,640 bytes	MD5: 0x7CB1DE28421806F22888182B2E2EABF3 SHA-1: 0xEAE1A13B7D37E46574122A1BA9B0A3BFB213CC89	Trojan Horse [Symantec] Backdoor.Win32.ZAccess.tzs [Kaspersky Lab] ZeroAccess.fe [McAfee] Troj/ZAccess-CH [Sophos] Trojan:Win32/Sirefef.P [Microsoft] Trojan.SuspectCRC [Ikarus]
3	[file and pathname of the sample #1]	192,512 bytes	MD5: 0x34AC3D1AB72E67DF7D60B3BD11604B02 SHA-1: 0x3B84B185C1C633FBE8D6A3DE37973214032DE0D5	Backdoor.Trojan [Symantec] Backdoor.Win32.ZAccess.tzs [Kaspersky Lab] ZeroAccess.fe [McAfee] Troj/ZAccess-CH [Sophos] Trojan:Win32/Sirefef.P [Microsoft] Backdoor.Win32.ZAccess [Ikarus]

• Notes:
• %AppData% is a variable that refers to the file system directory that serves as a common repository for application-specific data. A typical path is C:\Documents and Settings\[UserName]\Application Data.
• %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

• The following directories were created:
• %AppData%\{cbf70787-72f9-b6ef-7e3c-8c19ccb74892}
• %AppData%\{cbf70787-72f9-b6ef-7e3c-8c19ccb74892}\L
• %AppData%\{cbf70787-72f9-b6ef-7e3c-8c19ccb74892}\U
• %Windir%\Installer\{cbf70787-72f9-b6ef-7e3c-8c19ccb74892}
• %Windir%\Installer\{cbf70787-72f9-b6ef-7e3c-8c19ccb74892}\L
• %Windir%\Installer\{cbf70787-72f9-b6ef-7e3c-8c19ccb74892}\U

Memory Modifications

• There was a new process created in the system:

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

Process Name	Process Filename	Allocated Size
services.exe	%System%\services.exe	40,960 bytes

• Notes:
• %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 system service was modified:

Service Name	Display Name	New Status	Service Filename
ALG	Application Layer Gateway Service	"Stopped"	%System%\alg.exe

Registry Modifications

• The following Registry Keys were created:
• HKEY_CURRENT_USER\Software\Classes\CLSID\{42aedc87-2188-41fd-b9a3-0c966feabec1}
• HKEY_CURRENT_USER\Software\Classes\CLSID\{42aedc87-2188-41fd-b9a3-0c966feabec1}\InprocServer32

• The newly created Registry Value is:
• [HKEY_CURRENT_USER\Software\Classes\CLSID\{42aedc87-2188-41fd-b9a3-0c966feabec1}\InprocServer32]
• ThreadingModel = "Both"
• (Default) = "%AppData%\{cbf70787-72f9-b6ef-7e3c-8c19ccb74892}\n."

• The following Registry Value was modified:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{F3130CDB-AA52-4C3A-AB32-85FFC23AF9C1}\InprocServer32]
• (Default) =