2016-11-06 - PSEUDO-DARKLEECH RIG-V FROM 5.200.55[.]16 SENDS CERBER 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:

• Z2016-11-06-pseudoDarkleech-RIGv-sends-Cerber-ransomware.pcap.zip   418.4 kB (418,373 bytes)

• 2016-11-06-pseudoDarkleech-RIGv-sends-Cerber-ransomware.pcap   (650,858 bytes)

• 2016-11-06-pseudoDarkleech-RIGv-and-Cerber-ransomware-files.zip   562.5 kB (562,544 bytes)

• 2016-11-06-Cerber-ransomware-decryption-instructions-README.hta   (67,712 bytes)
• 2016-11-06-Cerber-ransomware-decryption-instructions.bmp   (1,920,054 bytes)
• 2016-11-06-page-from-fundeun_es-with-injected-script.txt   (125,465 bytes)
• 2016-11-06-pseudoDarkleech-RIGv-flash-exploit.swf   (51,785 bytes)
• 2016-11-06-pseudoDarkleech-RIGv-landing-page.txt   (5,137 bytes)
• 2016-11-06-pseudoDarkleech-RIGv-payload-Cerber-ransomware.exe   (278,199 bytes)

 

NOTES:

• Thanks to @FreeBSDfan for emailing me about the compromised website used for this blog entry.

• There are currently at least 2 versions of Rig EK being used by different campaigns.
• One is an updated/evolving "VIP version" version of Rig EK that @kafeine has been calling RIG-v as described here.
• The other version of Rig EK is "regular Rig" that generally looks the same as it has for a while now.
• RIG-v is currently being used by the Afraidgate and pseudoDarkleech campaigns.
• Regular Rig EK is still being used by the EITest campaign.

 

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
• 2016-10-03 - Malware-traffic-analysis.net:  The pseudoDarkleech campaign stops sending CryptXXX, starts sending Cerber ransomware

 

Shown above:  Flowchart for this infection traffic.

 

TRAFFIC

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

Shown above:  Traffic from the infection filtered in Wireshark.

 

ASSOCIATED DOMAINS:

• fundeun[.]es - Compromised site
• 5.200.55[.]16 port 80 - we.humanitarianfit[.]com - RIG-v
• 65.55.50[.]0 - 65.55.50[.]31 port (65.55.50[.]0/27)6892 - UDP traffic caused by Cerber ransomware
• 192.42.118[.]0 - 192.42.118[.]31 (192.42.118[.]0/27)port 6892 - UDP traffic caused by Cerber ransomware
• 194.165.16[.]0 - 194.165.19[.]255 (194.165.16[.]0/22) port 6892 - UDP traffic caused by Cerber ransomware
• 104.36.80[.]24 port 80 - ffoqr3ug7m726zou.mzuirs[.]top - HTTP traffic caused by Cerber ransomware

 

OTHER DOMAINS FROM THE DECRYPT INSTRUCTIONS:

• ffoqr3ug7m726zou.wk0295[.]top
• ffoqr3ug7m726zou[.]onion[.]to

 

FILE HASHES

FLASH EXPLOIT:

• SHA256 hash:  f822f0a010b41b68e69b89303d99c86f4b4c4559663a7b6b82b35505c96d8080
  File name:  2016-11-06-pseudoDarkleech-RIGv-flash-exploit.swf   (51,785 bytes)

PAYLOAD (CERBER RANSOMWARE):

• SHA256 hash:  fbc3ce9b347b7f7fe89bf403a97f3bade2913dd992606cc562f6c25469ab58a6
  File name:  C:\Users\[username]\AppData\Local\Temp\rad1C810.tmp.exe   (278,199 bytes)

 

IMAGES

Shown above:  Malware made persistent on the infected host.

 

FINAL NOTES

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