Here is a little tool that will help you to spoof any kind of file to any kind of file and still works as the first file extension

Download
http://unremote.ru/processdl.php?id=22

Explaining from scratch

Net Tools is a comprehensive set of host monitoring, network scanning, security, administration tools and much more, all with a highly intuitive user interface. It's an ideal tool for those who work in the network security, administration, training, internet forensics or law enforcement internet crimes fields.

Download
http://www.mabsoft.com/NetTools5.0.70.zip

QuickRecon is a simple information gathering tool that allows you to:

Bruteforce subdomains of a target domain
Perform zone transfer
Gather email addresses from Google.com and Bing.com
Find human relationships using XHTML Friends Network (microformats)

Download:
http://code.google.com/p/quickrecon/downloads/list

Details:

Can sniff any interface that has got an IP address, including 127.0.0.1 (localhost/loopback)
RawCap.exe is just 17 kB
No external libraries or DLL’s needed
No installation required, just download RawCap.exe and sniff
Can sniff most interface types, including WiFi and PPP interfaces
Minimal memory and CPU load
Reliable and simple to use

Download:
http://www.netresec.com/products/RawCap/RawCap.exe

This website contains a bunch of open source forensic tools.

Source
http://www2.opensourceforensics.org/tools/windows

RTCA is a Windows forensic analysis tool, registry, audit logs and files. RTCA basically is a standalone and portable application for extraction and analysis investigation, can be used in local configuration report or analysis after extraction. As it analysis after extraction analysis is fast and acurate.

Download
http://omnia-projetcs.googlecode.com/svn/trunk/RTCA/RtCA.exe

At this time DuQu does not propagate and has been released only within targeted industries, although Symantec admits it may also be elsewhere and not yet discovered. The original compile dates on some of the variants of DuQu so far analyzed suggest it may have existed as far back as November 3, 2010. Stuxnet compile dates were between June 2009 and March 2010 and therefore pre-date DuQu.

Download PDF
http://www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/w32_duqu_the_precursor_to_the_next_stuxnet.pdf

"Duqu" Removal Tool:

You only have to download and run it on the system, then reboot the PC if infection is found. Here is a complete rundown of the steps you need to take:
1. Download the Duqu_Removal_Tool.zip (.zip file), then double-click on it chose "Extract all files..." from the File menu, and follow the wizard's instructions. You can use any other decompression utility, like WinZip.
2. Navigate to the folder you have extracted the tool in, find the file called Duqu_Removal_tool.exe and double-click on it. Press the Scan button and let the removal tool scan your PC.
3. If you have Windows Vista with User Access Control enabled, or if you are running as a restricted user in Windows XP, right click the Duqu_Removal_tool.exe program and choose "Run as Administrator". You will be prompted to enter credentials for an admin account.
4. Press the OK button when the removal tool asks for a reboot.
5. If you don't already have permanent antivirus protection or if your current antivirus has failed you, consider using the advanced protection tool provided by BitDefender.

Download
http://www.duquremoval.com/files/Duqu_Removal_Tool.zip

The framework is going to be designed in a fashion similar to Metasploit, SNORT, or other systems that allow the security community to create plugins for new tasks as needed. The primary goal of OSSAMS is to normalize the data, there by allowing the security professional to better assess the current state of security for an organization.
Completed:
acunetix, burp, grendel, nessus, netsparker, nexpose community, nikto, nmap, ratproxy, retina community, skipfish, sslscan, w3af, wapiti, watcher, websecurify, zap.

Download
http://www.ossams.com/?page_id=46