We assume that the attacker was careless and did not perform any anti-forensic techniques on its machine. We use post-mortem computer forensic analysis of attacker and victim machine to find some artefacts in them, which can help to identify and possible to reconstruct the attack, and most important, to obtain valid evidence which holds in court. In this paper, we use an attack scenario against the known vulnerable web application WackoPicko, using several web attacks: SQL injection, stored and reflected XSS, remote file inclusion, and commandline injection. First, the victim machine usually gives some data, which are then used for identifying possible suspects, and this is followed by forensic analysis of suspects' devices, like computers, laptops, tablets, and even smart phones. For attacks against web applications, web application forensics is the branch which gives most of the answers. Digital forensics is one of our biggest line of defense against cyber criminals, because it provides evidence against them. Lets see how to Install Nessus on Backtrack 5 with step by step tutorial.Symantec Internet Security Threat Report 2014 is showing a horrified fact, that when an attacker looked for a site to compromise, one in eight sites made it relatively easy to gain access. HomeFeed users will need to re-register Nessus when moving between physical hosts. ProfessionalFeed users are currently limited to one reset every 30 days. By logging into the Tenable Customer Support Portal and going to “Activation Codes,” you can reset the activation code-to-host pairing. If you are using a Nessus ProfessionalFeed, you are allowed to reset your activation by clearing the current connection between a host and an activation code. If you do decide to move the virtual machine to a new system, or jump around to different systems using a bootable USB thumb drive or DVD, you will have to re-activate Nessus. The Nessus activation ties itself to the physical system on which it is installed. If you activate Nessus on a bootable USB thumb drive, DVD, or a virtual machine and move it to a new host system, the Nessus activation code will no longer be valid. Before you activate Nessus on your BackTrack 5 installation, be certain you have installed Nessus on Backtrack, either to the hard drive on the computer you plan to use or inside of a virtual machine that you plan to keep on the same host system. Nessus 4.4.1 now comes pre-installed on BackTrack 5 and requires the user to activate the installation.
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