2016-09-22 - PSEUDO-DARKLEECH RIG EK FROM 74.208.153.31 SENDS CRYPMIC RANSOMWARE

ASSOCIATED FILES:

• ZIP archive of the pcap:  2016-09-22-pseudoDarkleech-Rig-EK-sends-CrypMIC-ransomware.pcap.zip   161.5 kB (161,519 bytes)

• 2016-09-22-pseudoDarkleech-Rig-EK-sends-CrypMIC-ransomware.pcap   (397,872 bytes)

• ZIP archive of the malware:  2016-09-22-pseudoDarkleech-Rig-EK-sends-CrypMIC-malware-and-artifacts.zip   150.9 kB (150,852 bytes)

• 2016-09-22-page-from-joellipman.com-with-injected-script.txt   (136,502 bytes)
• 2016-09-22-pseudoDarkleech-CrypMIC-decrypt-instructions.bmp   (3,276,854 bytes)
• 2016-09-22-pseudoDarkleech-CrypMIC-decrypt-instructions.html   (238,156 bytes)
• 2016-09-22-pseudoDarkleech-CrypMIC-decrypt-instructions.txt   (1,636 bytes)
• 2016-09-22-pseudoDarkleech-Rig-EK-flash-exploit.swf   (25,513 bytes)
• 2016-09-22-pseudoDarkleech-Rig-EK-landing-page.txt   (30,100 bytes)
• 2016-09-22-pseudoDarkleech-Rig-EK-payload-CrypMIC.exe   (57,344 bytes)

 

NOTES:

• This compromised website has been used for the pseudoDarkleech campaign as early as 2016-06-01.
• I last documented this compromised website generating pseudoDarkleech traffic (then Neutrino EK) on 2016-06-10

 

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
• 2016-09-14 - Malware-traffic-analysis.net:  The pseudoDarkleech campaign starts using Rig EK instead of Neutrino EK

 

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 first pcap filtered in Wireshark.   Wireshark filter: http.request or (!(tcp.port eq 80) and tcp.flags eq 0x0002)

 

ASSOCIATED DOMAINS:

• www.joellipman.com - Compromised site
• 74.208.153.31 port 80 - martoniniwatsuk.atlantaofficebrokers.com - Rig EK
• 91.121.74.154 port 443 - post-infection CrypMIC callback, custom encoded and clear text, not HTTPS/SSL/TLS (both infections)

DOMAINS FROM THE DECRYPT INSTRUCTIONS:

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

 

FILE HASHES

FLASH EXPLOIT:

• SHA256 hash:  c9b281940374a6b02349c8804b6f58ae1faec061dccd346118acdf68c050824d
  File name:  2016-09-22-pseudoDarkleech-Rig-EK-flash-exploit.swf

PAYLOAD:

• SHA256 hash:  9f44d57b6ce58d6900d5d6f8b14dca3178bb3960fc267f0fd557ae1fad98a01f
  File name:  2016-09-22-pseudoDarkleech-Rig-EK-payload-CrypMIC.exe

 

IMAGES

Screenshot of the infected Windows host.

 

FINAL NOTES

Once again, here are the associated files:

• ZIP archive of the pcap:  2016-09-22-pseudoDarkleech-Rig-EK-sends-CrypMIC-ransomware.pcap.zip   161.5 kB (161,519 bytes)
• ZIP archive of the malware:  2016-09-22-pseudoDarkleech-Rig-EK-sends-CrypMIC-malware-and-artifacts.zip   150.9 kB (150,852 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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