SANS Digital Forensics and Incident Response Blog: Category - Incident Response

Digital Forensics Case Leads: Capturing Mac Memory, the Shifting Threat Landscape, Forensics Tool Updates, and Zero Day: A Novel

This week's edition of Case Leads features new and updated forensics tools, a report on changes in attack patterns, a novel from what may seem like an unlikely source and thoughts on timestamp manipulations. The ability to create a memory image on OS X has been lacking until now. A recently released report suggests that … Continue reading Digital Forensics Case Leads: Capturing Mac Memory, the Shifting Threat Landscape, Forensics Tool Updates, and Zero Day: A Novel

Favoring Frameworks for Intrusion Detection and Prevention

Revealing, maturing, and utilizing indicators through their lifecycle is the analytical engine behind Security Intelligence (or, if you prefer, Intel-driven CND). Each of these actions can be enhanced with custom, FOSS, and COTS tools, but perhaps no aspect relies on tools more heavily than the act of leveraging intelligence. The data rates and sizes of today's computers and networks mean that only through the use of automation can intelligence be leveraged - manual searching and correlation by analysts is simply impossible. Thus, the ability to codify intelligence in network and host security tools defines the limits of an organization's effective use of that intelligence. Continue reading Favoring Frameworks for Intrusion Detection and Prevention

Digital Forensics How-To: Memory Analysis with Mandiant Memoryze

Mandiant's Memoryze tool is without question one of the best forensic tools available. It is an incredibly powerful memory analysis suite that should be part of every incident responder's toolkit. It's free, but requires some patience to traverse the learning curve. Memoryze was built by Jamie Butler and Peter Silberman, a couple of hardcore memory / malware analysts that operate on a completely different level than most of us mere mortals. In this post I'll cover how to get started with Memoryze, because if you haven't added memory analysis to your intrusion investigations, there is a whole lot of evil out there that you are missing.

Getting Started

The first step is to go out and download the tool. An important thing to keep in mind is that Memoryze actually consists of two components: Memoryze and Audit Viewer. Each must be downloaded individually from the free tools section of the Mandiant

Digital Forensics: Detecting time stamp manipulation

At approximately 22:50 CDT on 20101029 I responded to an event involving a user who had received an email from a friend with a link to some kid's games. The user said he tried to play the games, but that nothing happened. A few minutes later, the user saw a strange pop up message asking to send an error report about regwin.exe to Microsoft.

I opened a command prompt on the system, ran netstat and saw an established connection to a host on a different network on port 443. The process id belonged to a process named kids_games.exe.

I grabbed a copy of Mandiant's Memoryze and collected a memory image from the system and copied it to my laptop for offline analysis using Audit Viewer.

Audit Viewer gave the kids_games.exe process a very high Malware Rating Index (see Figure 1), so I decided there was probably more


Touch Screen Voting Requires Forensic Foresight

There has been a ground swell of news reports in the past week about possible touch screen voting irregularities. Stories have been coming out of states like Nevada and North Carolina. I was rankled when Nevada election officials proclaimed it "technologically impossible" that voter's electronic ballot was "premarked" for a candidate when a voter inserted her ballot card into a touch screen voting machine. According to the voter, several people she knows experienced the same condition. The voter did not alert election officials, but appears to have alerted the media

Did it happen? I don't know, but I don't want to hear our election officials telling voters or the press that such