Neutrino Exploit Kit via pseudoDarkleech delivers CrypMic Ransomware

NOTES:

  • Today I captured traffic from the latest version of CrypMic ransomware. The ransomware was delivered via the pseudoDarkleech campaign with use of the Neutrino Exploit Kit.
  • The injection method was an Iframe, as mentioned in a post on SANS Internet Storm Center forum Change in patterns for the pseudoDarkleech campaign.
  • The pseudoDarkleech campaign is making use of DNS Shadowing as explained in a sucuri.net blog post Website Malware – Evolution of Pseudo Darkleech. 
  • CrypMic continues to send its ransom notes over SSL port 443 in clear text.
  • CrypMic is no longer using vssadmin.exe to delete the Windows shadow copy.

I have added a zipped pcap file for your analysis. The password is the usual used by malware researchers. If you do not know it please email me.
info@broadanalysis.com

PCAP file of the infection traffic:
2016-09-06-Neutrino-EK-pcap.zip

 

ASSOCIATED DOMAINS AND IP ADDRESSES:

  • 74.208.75.169 – sevrent.professionaldevelopmentsolutions.co.uk – Neutrino EK
  • 95.211.225.212 – Port 443 – C2 Check-In – POST INFECTION TRAFFIC

ASSOCIATED DOMAINS FOR RANSOM PAYMENT:

http://ccjlwb22w6c22p2k.onion.to
http://ccjlwb22w6c22p2k.onion.city

 

IMAGES AND DETAILS OF INFECTION CHAIN:

Shown above: Traffic  associated with the Neutrino exploit and CrypMic ransomware infection.

 

Shown above: Index page of compromised site viewed with a text editor after extracting using Wireshark File => Export Objects => HTTP => Save As index.html – shows injected script redirecting to the Neutrino EK Landing Page.

 

Shown above: Packet 144 shows Neutrino exploiting flash

 

Shown above: README.TXT ransom note and instructions associated with CrypMic ransomware

 

MALICIOUS PAYLOAD ASSOCIATED WITH NEUTRINO EXPLOIT: