Rig 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 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 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:
2016-09-19-Rig-EK-2-pcap.zip

 

ASSOCIATED DOMAINS AND IP ADDRESSES:

74.208.154.246 – arizonasboonstak.artofmusicstudio.com – Rig EK LANDING PAGE
65.49.8.96 – Port 443 – Clear Text – CnC Check-In POST INFECTION TRAFFIC

 

IMAGES AND DETAILS OF INFECTION CHAIN:

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

 

Shown above: Injected script found on compromised host redirecting to the Rig exploit kit landing page

 

Shown above: CrypMic ransomware payload delivered as an executable file

 

Shown above: Compromised host desktop showing ransom notes and payment instructions associated with CrypMic ransomware

 

MALICIOUS PAYLOAD ASSOCIATED WITH RIG EXPLOIT: