2016-08-24 - PSEUDO-DARKLEECH NEUTRINO EK FROM 74.208.154[.]9 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:

• Z2016-08-24-pseudoDarkleech-Neutrino-EK-sends-CrypMIC-ransomware.pcap.zip   263.0 kB (262,994 bytes)

• 2016-08-24-pseudoDarkleech-Neutrino-EK-sends-CrypMIC-ransomware.pcap   (440,450 bytes)

• 2016-08-24-pseudoDarkleech-Neutrino-EK-and-CrypMIC-ransomware-files.zip   337.2 kB (337.225 bytes)

• 2016-08-24-CrypMIC-ransomware-decrypt-instructions.BMP   (3,276,854 bytes)
• 2016-08-24-CrypMIC-ransomware-decrypt-instructions.JPG   (224,918 bytes)
• 2016-08-24-CrypMIC-ransomware-decrypt-instructions.HTML   (238,182 bytes)
• 2016-08-24-CrypMIC-ransomware-decrypt-instructions.TXT   (1,654 bytes)
• 2016-08-24-page-from-curbco2121_com-with-injected-script.txt   (11,886 bytes)
• 2016-08-24-pseudoDarkleech-Neutrino-EK-landing-page.txt   (2,430 bytes)
• 2016-08-24-pseudoDarkleech-Neutrino-EK-payload-CrypMIC-ransomware.dll   (172,544 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:

• curbco2121[.]com - Compromised site
• 74.208.154[.]9 port 80 - ploffers.bundlebear[.]co[.]uk - Neutrino EK
• 85.14.243[.]9 port 443 - Post-infection traffic caused by CrypMIC ransomware (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 ransomware since 2016-07-26 or earlier.

 

FILE HASHES

PAYLOAD:

• SHA256 hash:  2e956d0729752a4623c6370260d85d41f8b1f56dc2dd92cd1682111ce20057ab
  File name:  2016-08-24-pseudoDarkleech-Neutrino-EK-payload-CrypMIC-ransomware.dll

 

IMAGES

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

 

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