2016-08-18 - PSEUDO-DARKLEECH NEUTRINO EK FROM 176.31.151.176 SENDS CRYPMIC RANSOMWARE

NOTICE:

• The zip archives on this page have been updated, and they now use the new password scheme.  For the new password, see the "about" page of this website.

ASSOCIATED FILES:

• ZIP archive of the pcaps:  2016-08-18-pseudoDarkleech-Neutrino-EK-sends-CrypMIC.pcap.zip   199.2 kB (199,240 bytes)

• 2016-08-18-pseudoDarkleech-Neutrino-EK-sends-CrypMIC.pcap   (421,795 bytes)

• ZIP archive of the malware:  2016-08-18-pseudoDarkleech-Neutrino-EK-sends-CrypMIC-malware-and-artifacts.zip   184.3 kB (184,306 bytes)

• 2016-08-18-page-from-marksandciraco.com-with-injected-script.txt   (85,859 bytes)
• 2016-08-18-pseudoDarkleech-CrypMIC-decrypt-instructions.BMP   (3,276,854bytes)
• 2016-08-18-pseudoDarkleech-CrypMIC-decrypt-instructions.HTML   (238,182 bytes)
• 2016-08-18-pseudoDarkleech-CrypMIC-decrypt-instructions.TXT   (1,654 bytes)
• 2016-08-18-pseudoDarkleech-Neutrino-EK-flash-exploit.swf   (78,904 bytes)
• 2016-08-18-pseudoDarkleech-Neutrino-EK-landing-page.txt   (2,430 bytes)
• 2016-08-18-pseudoDarkleech-Neutrino-EK-payload-CrypMIC.dll   (69,632 bytes)

 

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 same 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:

• marksandciraco[.]com - Compromised site
• 176.31.151[.]176 port 80 - lesiaksiletz.manchester-nutrition[.]co[.]uk - Neutrino EK
• 85.14.243[.]9 port 443 - Post-infection traffic caused by CrypMIC (custom encoded & clear text, not HTTPS/SSL)

DOMAINS FROM THE DECRYPT INSTRUCTIONS:

• ccjlwb22w6c22p2k[.]onion[.]to
• ccjlwb22w6c22p2k[.]onion[.]city

NOTE: The above 2 domains from the decrypt instructions are the same ones I've seen from CrypMIC since 2016-07-26 or earlier.

 

FILE HASHES

FLASH EXPLOIT:

• SHA256 hash:  562456ddae802ab4dbf834d100f2af4724245c1941a4d66b97525278740ff0d1
  File name:  2016-08-18-pseudoDarkleech-Neutrino-EK-flash-exploit.swf

PAYLOAD:

• SHA256 hash:  d7dec457e74332f5ce06c1bfb8a98bbe1979f1118a7ed8efb89884445e6684d9
  File name:  2016-08-18-pseudoDarkleech-Neutrino-EK-payload-CrypMIC.dll

 

IMAGES

Shown above:  Desktop of an infected Windows host after rebooting.

 

FINAL NOTES

Once again, here are the associated files:

• ZIP archive of the pcaps:  2016-08-18-pseudoDarkleech-Neutrino-EK-sends-CrypMIC.pcap.zip   199.2 kB (199,240 bytes)
• ZIP archive of the malware:  2016-08-18-pseudoDarkleech-Neutrino-EK-sends-CrypMIC-malware-and-artifacts.zip   184.3 kB (184,306 bytes)

NOTICE:

• The zip archives on this page have been updated, and they now use the new password scheme.  For the new password, see the "about" page of this website.

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