Neutrino Exploit Kit via EITEST 85.93.0.12 delivers CrypMic Ransomware


NOTES:

  • Today I captured traffic from the latest version of CrypMic ransomware. The ransomware was delivered via the EITEST campaign.
  • I first saw the EITEST campaign sending CrypMic Ransomware on July 28th, 2016.
  • Some background on the EITEST campaign can be found in a Palo Alto Networks blog post How the EITest Campaign’s Path to Angler EK Evolved Over Time.
  • CrypMic continues to send its ransom notes over SSL port 443 in clear text.
  • [UPDATE] CrypMic is no longer using vssadmin.exe to delete the Windows shadow copy. I first noticed this yesterday with another CrypMic infection via the pseudoDarkleech campaign.
  • [UPDATE] The latest version of CrypMic can be downloaded from hybrid-analysis.com
  • [UPDATE] For a great analysis and the reversing of the Neutrino Exploit Kit, visit @Ledtech3 blog post Pulling apart Neutrino EK

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:
2016-08-10-Neutrino-EK-pcap.zip

 

ASSOCIATED DOMAINS AND IP ADDRESSES:

  • 85.93.0.12 – osavity.top – EITEST GATE
  • 69.175.20.6 – tulivyosikia.baexpert.org – Neutrino EK LANDING PAGE
  • 85.14.243.9 Port 443 – C2 Check-In – POST INFECTION TRAFFIC

ASSOCIATED DOMAINS FOR RANSOM PAYMENT:

http://7aggi2bq4bms4dfo.onion.to
http://7aggi2bq4bms4dfo.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 EITEST gate to start infection chain – Web page source code can be found by right clicking on web page and selecting “View source”

 

Shown above: Script on EITEST gate 85.93.0.12  redirecting to the Neutrino EK landing page

 

Shown above: After being redirected to the Neutrino EK landing page, Neutrino then exploits flash

 

Shown above: After Neutrino EK exploits flash it then sends its malicious payload in encrypted or obfuscated format

 

Shown above: CrypMic is no longer using vssadmin.exe to delete Windows shadow copy as shown in hybrid-analysis.com analysis of the malicious DLL file.

 

Shown above: CrypMic .TXT ransom note and De-Crypt instructions README.txt

 

MALICIOUS PAYLOAD ASSOCIATED WITH NEUTRINO EXPLOIT: