Neutrino EK via pseudoDarkleech delivers CrypMic Ransomware – New CnC

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. 
  • Today I noticed an IP address change in CrypMic’s Command and Control from 193.111.140.100 to 46.165.246.9.
  • 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:
2016-09-09-Neutrino-EK-pcap.zip

 

ASSOCIATED DOMAINS AND IP ADDRESSES:

  • 62.138.12.67 – exotenvo.4dwin.com – Neutrino EK LANDING PAGE
  • 46.165.246.9 – Port 443 – Clear Text – 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: Network traffic  associated with the Neutrino exploit and CrypMic ransomware infection.

 

Shown above: Injected script found on index page of compromised site which redirects visitor to the Neutrino EK landing page to start infection chain – Web page source code can be found by right clicking on web page and selecting “View source”

 

Shown above: Ransom and payment instruction on infected host desktop associated with the CrypMic ransomware infection

 

MALICIOUS PAYLOAD ASSOCIATED WITH NEUTRINO EXPLOIT: