Submission Summary:

• Submission details:
• Submission received: 4 August 2012, 13:37:04
• Processing time: 9 min 42 sec
• Submitted sample:
• File MD5: 0xE187763C92E2ACC6BB1C804309EBB381
• File SHA-1: 0xD64623B8B5BBFA20BB7A08A43D7FED0E7D503E4F
• Filesize: 80,896 bytes
• Alias:
• W32.Cridex [Symantec]
• Trojan.Win32.Yakes.ahur [Kaspersky Lab]
• PWS-Zbot.gen.air [McAfee]
• Worm:Win32/Cridex.E [Microsoft]
• Trojan.Win32.Yakes [Ikarus]

• Summary of the findings:

What's been found	Severity Level
Produces outbound traffic.
Downloads/requests other files from Internet.
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:

• 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.
• %Temp% is a variable that refers to the temporary folder in the short path form. By default, this is C:\Documents and Settings\[UserName]\Local Settings\Temp\ (Windows NT/2000/XP).

• The following directory was created:
• %AppData%\25BC2D7B

Memory Modifications

• There were new processes 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
explorer.exe	%Windir%\explorer.exe	102,400 bytes

• Notes:
• %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

Registry Modifications

• The following Registry Keys were created:
• HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CFBDC89D4
• HKEY_CURRENT_USER\Software\Microsoft\Windows NT\S25BC2D7B

• The newly created Registry Value is:
• [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
• KB00121600.exe = ""%AppData%\KB00121600.exe""

so that KB00121600.exe runs every time Windows starts

Other details

• To mark the presence in the system, the following Mutex objects were created:
• Local\XMM000003F8
• Local\XMI000003F8
• Local\XMRFB119394
• Local\XMM000005E4
• Local\XMI000005E4
• Local\XMM0000009C
• Local\XMI0000009C
• Local\XMM000000C8
• Local\XMI000000C8

• The following Internet Connection was established:

Outbound traffic (potentially malicious)

• There was an outbound traffic produced on port 8080: