Submission Summary:

• Submission details:
• Submission received: 16 August 2010, 09:59:41
• Processing time: 6 min 47 sec
• Submitted sample:
• File MD5: 0x8CFCDB5DA5F7744918F46E941A247B6A
• File SHA-1: 0xA2F81067ABD52706A3EF700AE539D11752E1A96E
• Filesize: 99,412 bytes
• Alias:
• Trojan.Win32.VBKrypt.elw [Kaspersky Lab]
• Trojan:Win32/Ircbrute [Microsoft]

• Summary of the findings:

What's been found	Severity Level
Communication with a remote IRC server.
Produces outbound traffic.
Creates a startup registry entry.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

• Attention! Characteristics of the following security risk was identified in the system:

• 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 file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Windir%\csrs.exe [file and pathname of the sample #1]	99,412 bytes	MD5: 0x8CFCDB5DA5F7744918F46E941A247B6A SHA-1: 0xA2F81067ABD52706A3EF700AE539D11752E1A96E	Trojan.Win32.VBKrypt.elw [Kaspersky Lab] Trojan:Win32/Ircbrute [Microsoft]

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

Memory Modifications

• There was a new process created in the system:

Process Name	Process Filename	Main Module Size
csrs.exe	%Windir%\csrs.exe	331,776 bytes

Registry Modifications

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
• Windows Services = "csrs.exe"

so that csrs.exe runs every time Windows starts

• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\Install\Software\Microsoft\Windows\CurrentVersion\Run]
• Windows Services = "csrs.exe"

so that csrs.exe runs every time Windows starts

Other details

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

	Spain

• The following port was open in the system:

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

Outbound traffic (potentially malicious)

• Attention! There was a new connection established with a remote IRC Server. The generated outbound IRC traffic is provided below:

• There was an outbound traffic produced on port 4466: