2016-08-30 - EITEST RIG EK SENDS CRYPTFILE2 RANSOMWARE

ASSOCIATED FILES:

  • 2016-08-30-EITest-Rig-EK-sends-CryptFile2-ransomware.pcap   (234,013 bytes)
  • 2016-08-30-CryptFile2-ransomware-decrypt-instruction.TXT   (3,175 bytes)
  • 2016-08-30-CryptFile2-ransomware-decrypt-instructions.HTML   (2,124 bytes)
  • 2016-08-30-EITest-Rig-EK-flash-exploit-after-cairvest.com.swf   (46,163 bytes)
  • 2016-08-30-EITest-Rig-EK-landing-page-after-cairvest.com.txt   (3,791 bytes)
  • 2016-08-30-EITest-Rig-EK-payload-CryptFile2.exe   (135,168 bytes)
  • 2016-08-30-EITest-flash-redirect-from-ogimac.xyz.swf   (5,762 bytes)
  • 2016-08-30-page-from-clairvest.com-with-injected-EITest-script.txt   (27,589 bytes)

 

2016-08-31 UPDATE:

 


Shown above:  My original mistake and subsequent change for identification of the malware payload.

 

MY PREVIOUS DOCUMENTATION ON CRYPTFILE2 RANSOMWARE:

 


Shown above:  Flowchart for this infection traffic.

 

TRAFFIC


Shown above:  Injected script in page from the compromised site pointing to the EITest gate.

 


Shown above:  Traffic from the pcap filtered in Wireshark.

 


Shown above:  EmergingThreats alerts (that I originally ignored) calling this ransomware CryptFile2.

 

ASSOCIATED DOMAINS:

EMAILS TO GET THE DECRYPT INSTRUCTIONS:

 

FILE HASHES

FLASH FILES:

PAYLOAD:

 

IMAGES


Shown above:  The infected Windows desktop after rebooting.

 


Shown above:  Example of the encrypted file names from an infected host.

 


Shown above:  Registry entries showing how the CryptFile2 ransomware stays persistent on an infected Windows host.

 

FINAL NOTES

Once again, here are the associated files:

ZIP files are password-protected with the standard password.  If you don't know it, look at the "about" page of this website.

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