2015-02-15 - TRAFFIC ANALYSIS EXERCISE
- ZIP - pcap of the traffic: 2015-02-15-traffic-analysis-exercise.pcap.zip
NOTE: ZIP files are password-protected with the standard password. If you don't know it, look at the "about" page of this website.
SECOND DECISION POINT - WITH THOSE SNORT EVENTS, YOU FINISH THE REPORT
Here's what you should've found when looking at the pcap.
Let's go through this, step-by-step. First, load the pcap in wireshark. Hopefully, you've set it up as I've described in my tutorial here. You can find the host name and mac address for this IP address in the DHCP or NetBIOS name service (NBNS) traffic. See the images below for details:
Use http.request for the filter and see the web browsing traffic. At the botton, you'll find the last few HTTP GET requests for Nuclear EK.
The exploit kit should send files in the following sequence:
- Landing page
- Exploit (Flash, Java, Silverlight, etc)
- Malware payload after the exploit was successful
In most exploit kits, including Nuclear, these are all sent from same IP address and domain. Here are highlights from the pcap, so you can see if the malware payload was delivered.
SECOND DECISION POINT - ALTERNATE CHOICE
Still not 100 percent satisfied, are you? People at your UK location find the computer (a Dell desktop) and perform some forensics. They send you a ZIP archive of some suspicious files they found on the computer.
- Click here to get the additional files.
FINAL NOTES IF YOU CHOSE TO STOP HERE
- You've determined wether or not the malware as delivered, and you initiated procedures to take care of the situation. From an incident response perspective, that's all you need.
- You've got other snort events to investigate. No other infected computers will escape notice--not on your watch! Spend too much time on one incident, and you might miss something even more important.
Click here to exit this exercise and return to the main page.