2016-09-11 - PSEUDO-DARKLEECH NEUTRINO EK FROM 137.74.223.60 SENDS CRYPMIC RANSOMWARE

ASSOCIATED FILES:

• ZIP archive of the pcap:  2016-09-11-pseudoDarkleech-Neutrino-EK-sends-CrypMIC-ransomware.pcap.zip   206.3 kB (206,315 bytes)

• 2016-09-11-pseudoDarkleech-Neutrino-EK-sends-CrypMIC-ransomware.pcap   (438,890 bytes)

• ZIP archive of the malware:  2016-09-11-pseudoDarkleech-Neutrino-EK-sends-CrypMIC-malware-and-artifacts.zip   180.7 kB (180,742 bytes)

• 2016-09-11-page-from-hotelpodzamkom.sk-with-injected-script.txt   (132,246 bytes)
• 2016-09-11-pseudoDarkleech-CrypMIC-decrypt-instructions.txt   (1,654 bytes)
• 2016-09-11-pseudoDarkleech-Neutrino-EK-flash-exploit.swf   (78,332 bytes)
• 2016-09-11-pseudoDarkleech-Neutrino-EK-landing-page.txt   (2,402 bytes)
• 2016-09-11-pseudoDarkleech-Neutrino-EK-payload-CrypMIC.dll   (124,928 bytes)

 

NOTES:

• Thanks again to Baber for informing me about today's compromised website.

 

BACKGROUND ON THE PSEUDO-DARKLEECH CAMPAIGN:

• Something I wrote on exploit kit (EK) fundamentals:  link
• 2016-03-22 - PaloAlto Networks Unit 42 blog:  Campaign Evolution: Darkleech to Pseudo-Darkleech and Beyond
• 2016-07-02 - SANS ISC diary:  Change in patterns for the pseudoDarkleech campaign

 

BACKGROUND ON CRYPMIC RANSOMWARE:

• 2016-07-06 - SANS ISC diary:  CryptXXX ransomware updated   [The date I first noticed this new branch of ransomware.]

• 2016-07-14 - From the Proofpoint blog [link]: "We believe that CryptXXX is in active development and possibly split off into two branches. The original branch is now up to version 5.001 (we wrote about the upgrade to version 3.100 near the end of May), while the new branch uses a different format for versioning and will require further analysis."

• 2016-07-20 - TrendLabs Security Intelligence Blog - CrypMIC Ransomware Wants to Follow CryptXXX's Footsteps   [TrendLabs analyzes the new branch and names it.]

 

Shown above:  Flowchart for this infection traffic.

 

TRAFFIC

Shown above:  Injected script from the pseudoDarkleech campaign in page from the compromised site.

 

Shown above:  Traffic from the pcap filtered in Wireshark.   Wireshark filter: http.request or (!(tcp.port eq 80) and tcp.flags eq 0x0002)

 

ASSOCIATED DOMAINS:

• hotelpodzamkom.sk - Compromised website
• 137.74.223.60 port 80 - residertwithcallback.scrubs101webstore.info - Neutrino EK
• 46.165.246.9 port 443 - post-infection CrypMIC callback, custom encoded and clear text, not HTTPS/SSL/TLS

DOMAINS FROM THE DECRYPT INSTRUCTIONS:

• ccjlwb22w6c22p2k.onion.to
• ccjlwb22w6c22p2k.onion.city

 

FILE HASHES

FLASH EXPLOIT:

• SHA256 hash:  9b6657e51e220540955a96f9fe21788484a9da8a63727a33eafe0f54fd9e8d9c
  File name:  2016-09-11-pseudoDarkleech-Neutrino-EK-flash-exploit.swf

PAYLOAD:

• SHA256 hash:  8a45d19ddf60c2a8bc47f76b07408e09e3c679a30bc08da57e07ce6e28fcf3c5
  File name:  2016-09-11-pseudoDarkleech-Neutrino-EK-payload-CrypMIC.dll

 

FINAL NOTES

Once again, here are the associated files:

• ZIP archive of the pcap:  2016-09-11-pseudoDarkleech-Neutrino-EK-sends-CrypMIC-ransomware.pcap.zip   206.3 kB (206,315 bytes)
• ZIP archive of the malware:  2016-09-11-pseudoDarkleech-Neutrino-EK-sends-CrypMIC-malware-and-artifacts.zip   180.7 kB (180,742 bytes)

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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