2016-10-27 - EITEST RIG EK FROM 93.115.38.143 SENDS CHTHONIC BANKING TROJAN

ASSOCIATED FILES:

• ZIP archive of the pcap:  2016-10-27-EITest-Rig-EK-sends-chthonic.pcap.zip   1.1 MB (1,119,379 bytes)

• 2016-10-27-EITest-Rig-EK-sends-chthonic.pcap   (1,425,976 bytes)

• ZIP archive of the malware:  2016-10-27-EITest-Rig-EK-sends-Chthonic-malware-and-artifacts.zip   192 kB (192,273 bytes)

• 2016-10-27-EITest-Rig-EK-flash-exploit.swf   (52,575 bytes)
• 2016-10-27-EITest-Rig-EK-landing-page.txt   (3,261 bytes)
• 2016-10-27-EITest-Rig-EK-page-from-sunelec.com-with-injected-EITest-script.txt   (137,024 bytes)
• 2016-10-27-EITest-Rig-EK-payload-Chthonic.exe   (181,760 bytes)

 

NOTES:

• There are currently at least 2 versions of Rig EK being used in the wild by different campaigns.
• One is an updated/evolving "VIP version" version of Rig EK that @kafeine has described as RIG-v 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.

• Thanks to @killamjr for his tweet about the compromised site used in this blog entry.

 

BACKGROUND ON THE EITEST CAMPAIGN:

• Something I wrote on exploit kit (EK) fundamentals:  link
• 2016-10-03 - Palo Alto Networks Unit 42 blog:  EITest Campaign Evolution: From Angler EK to Neutrino and Rig.
• 2016-10-03 - Broadanalysis.com:  EITest campaign stopped using a gate.
• 2016-10-15 - Broadanalysis.com:  EITest campaing stops using obfuscation for injected script in pages from compromised websites.

 

Shown above:  Flowchart for this infection traffic.

 

TRAFFIC

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

Shown above:  Traffic from the infection filtered in Wireshark.

 

ASSOCIATED DOMAINS:

• sunelec.com - Compromised site
• 93.115.38.143 port 80 - ws78.p51qx.top - Rig EK
• 195.123.209.74 port 80 - helotemafoganefog.com - Chthonic post-infection callback
• 195.123.209.74 port 80 - miligratonylaonella.com - Chthonic post-infection callback

 

FILE HASHES

FLASH EXPLOIT:

• SHA256 hash:  6b3da198f6adf7bee429fac2cfd826106911cb5e8b93a2126ce644a395d6f0fd
  File name:  2016-10-27-EITest-Rig-EK-flash-exploit.swf   (52,575 bytes)

PAYLOAD:

• SHA256 hash:  d5af74a928ced1af1a5334ee4116f3de9b811f2e0738b438e602e49dcd7fa485
  File name:  C:\Users\[username]\AppData\Local\Temp\115A.tmp   (181,760 bytes)

 

IMAGES

Shown above:  Regsitry entries made for malware persistence.

 

Shown above:  Alerts on the pcap from the Emerging Threats Pro (ETPRO) ruleset using Sguil on Security Onion.  Alerts for Chthonic are noted.

 

FINAL NOTES

Once again, here are the associated files:

• ZIP archive of the pcap:  2016-10-27-EITest-Rig-EK-sends-chthonic.pcap.zip   1.1 MB (1,119,379 bytes)
• ZIP archive of the malware:  2016-10-27-EITest-Rig-EK-sends-Chthonic-malware-and-artifacts.zip   192 kB (192,273 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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