Blog: SANS Digital Forensics and Incident Response Blog

Blog: SANS Digital Forensics and Incident Response Blog

TorrentLocker Unlocked

Guest submission byTaneli Kaivola, Patrik Nisn and Antti Nuopponen of NIXU

TorrentLocker is a new breed of ransomware that has been spreading lately. Like CryptoLocker and CryptoWall it encrypts files on a victim's machine and then demands ransom. The victim has to pay to get the decryption software that can decrypt the files.

On a recent incident response case we came across a malware program that had all the known characteristics of TorrentLocker. We started to analyze the malware to see if there was a way to get the files decrypted without paying the ransom. It is well known that some ransomwares like CryptoLocker do implement proper encryption and that it is not possible to recover the encrypted files, but on the other hand, there are also several examples of malware that


Super Sunday Funday Forensic Challenge

The Challenge: Starting September 4, 2014 on the Hacking Exposed Computer Forensics Blog the first forensicimage will be available for download. Your goal is to solve the questionwith the first forensic image and email it to

The Challenge:

The first forensic image is available for download. Your goal is to solve the question with the first forensic image located at:!qoxgGYCY!1jM32pncF0wE-TROhaXFI07hZbu5AfZ1BJE-p8tm1mo

and email the answer to the following

  • What was used to wipe this drive?

  • What special options were given?

  • What file was wiped from this

Copier Forensics in 2014: The Good, The Bad, and The Ugly

Recently, I had the opportunity to do forensic analysis on a HDD extracted from a Canon ImageRunner Advanced C5240 Multifunction Copier. After a story was broken by CBS News, back in 2010, it seemed likely that less would be available than is described in the copier forensic write-ups here and here. Nonetheless, I was hopeful. As you will see, my results were somewhat mixed, but the security enhancements put in place after that article could certainly have been much more complete.

The Good:

The first new security feature I noticed, when beginning my examination of the drive, was that the ...

Using Sysinternals System Monitor (Sysmon) in a Malware Analysis Lab

System Monitor (Sysmon) is a new tool from Microsoft, designed to run in the Windows system's background, logging details related to process creation, network connections, and changes to file creation time. This information can assist in troubleshooting and forensic analysis of the host where the tool was installed prior to the incident that's being investigated. This article explores the role that System Monitor might play in a malware analysis lab, possibly supplementing tools such as Process Monitor.

F-Response Enterprise now in FOR508: Advanced #DFIR

Starting in August, 2014 - F-Response Enterprise is now part of the SANS 508 Training Course and students will receive it while attending the course.

FOR508 has been updated with cutting edge Enterprise Incident Response capabilities. Starting in the Virginia Beach course attendees will receive a 3 month F-Response Enterprise license as part of the course materials. In addition, registering that license with F-Response immediately after the course will allow students to continue to use that license for an additional 3 months added on to the dongle.