Submission Summary:

• Submission details:
• Submission received: 7 September 2012, 09:26:23
• Processing time: 8 min 7 sec
• Submitted sample:
• File MD5: 0x06F94C88CED882FC8ED9A8BFF26903B9
• File SHA-1: 0xDD2D3C5DFCE1F0C57A84C18754085763018A7F0C
• Filesize: 217,088 bytes
• Alias:
• Trojan.Win32.Jorik.Vobfus.fazl [Kaspersky Lab]
• VBObfus.da [McAfee]
• Worm:Win32/Vobfus.GM [Microsoft]
• Virus.Win32.Cryptor [Ikarus]

• Summary of the findings:

What's been found	Severity Level
Modifies some system settings that may have negative impact on overall system security state.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

• Attention! The following threat category was identified:

Threat Category	Description
	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	%UserProfile%\xaanuk.exe	217,088 bytes	MD5: 0x089B3F7220F47F94D5EE78446FC2EA0F SHA-1: 0xF6FB963F6ABA0EA05ADE2E220E6CC84040463254	Trojan.Win32.Jorik.Vobfus.fazl [Kaspersky Lab] VBObfus.da [McAfee] Worm:Win32/Vobfus.GM [Microsoft] Virus.Win32.Cryptor [Ikarus]
2	[file and pathname of the sample #1]	217,088 bytes	MD5: 0x06F94C88CED882FC8ED9A8BFF26903B9 SHA-1: 0xDD2D3C5DFCE1F0C57A84C18754085763018A7F0C	Trojan.Win32.Jorik.Vobfus.fazl [Kaspersky Lab] VBObfus.da [McAfee] Worm:Win32/Vobfus.GM [Microsoft] Virus.Win32.Cryptor [Ikarus]

• Note:
• %UserProfile% is a variable that specifies the current user's profile folder. By default, this is C:\Documents and Settings\[UserName] (Windows NT/2000/XP).

Memory Modifications

• There were new processes created in the system:

Registry Modifications

• The following Registry Keys were created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
• HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU]
• NoAutoUpdate = 0x00000001

to disable automatic Windows Updates

• [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
• xaanuk = "%UserProfile%\xaanuk.exe /r"
• xaanuk = "%UserProfile%\xaanuk.exe /a"

so that xaanuk.exe runs every time Windows starts

Other details

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

• The following port was open in the system:

• The following Host Name was requested from a host database:
• ns1.chopstickers.com

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