Rig Exploit Kit via pseudoDarkleech from 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 Rig 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.
  • 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.
  • CrypMic is now sending its payload as an .EXE executable file
  • I was not able to complete the CryptMic infection without refreshing the web browser 3 times.
  • The same flash exploit file was sent each time I refreshed the web browser however the malicious payloads were different.
  • CrypMic has changed its Command and Control from IP address 65.49.8.96 to 91.121.74.154

 

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:
2016-09-21-Rig-EK-2-pcap.zip

 

ASSOCIATED DOMAINS AND IP ADDRESSES:

  • www.completekitchenunits.co.uk – COMPROMISED SITE
  • 74.208.78.147 – asytahigroskopie.ezfitheadwear.com – Rig EK LANDING PAGE
  • 91.121.74.154 – Port 443 – Clear Text – CnC Check-In POST INFECTION TRAFFIC
    [AS16276 OVH , FR France Roubaix Ovh Sas]

ASSOCIATED DOMAINS FOR RANSOM PAYMENT:

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

 

IMAGES AND DETAILS OF INFECTION CHAIN:

asytahigroskopie1Shown above: Network traffic  associated with the Rig exploit and CrypMic ransomware infection.

 

Shown above: Injected script found on index page of compromised site which redirects visitor to the Rig 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: Compromised host desktop showing ransom notes and payment instructions associated with CrypMic ransomware

 

MALICIOUS PAYLOAD ASSOCIATED WITH RIG EXPLOIT: