2017-01-10 - EITEST RIG-V FROM 92.53.124.185 SENDS CRYPTOMIX RANSOMWARE

ASSOCIATED FILES:

• ZIP archive of the pcaps:  2017-01-10-EITest-Rig-V-sends-CryptoMix-all-3-pcaps.zip   755 kB (754,794 bytes)

• 2017-01-10-1st-run-EITest-Rig-V-sends-CryptoMix.pcap   (348,761 bytes)
• 2017-01-10-2nd-run-EITest-Rig-V-sends-CryptoMix.pcap   (307,325 bytes)
• 2017-01-10-3rd-run-EITest-Rig-V-sends-CryptoMix.pcap   (308,656 bytes)

• ZIP archive of the malware:  2017-01-10-EITest-Rig-V-sends-CryptoMix-malware-and-artifacts.zip   279 kB (277,807 bytes)

• 2017-01-10-1st-run-EITest-Rig-V-landing-page.txt   (5,180 bytes)
• 2017-01-10-1st-run-EITest-Rig-V-payload-Cryptomix-rad40A34.tmp.exe   (98,304 bytes)
• 2017-01-10-1st-run-page-from-activaclinics.com-with-injected-EITest-script.txt   (59,323 bytes)
• 2017-01-10-2nd-run-EITest-Rig-V-landing-page.txt   (5,213 bytes)
• 2017-01-10-2nd-run-EITest-Rig-V-payload-Cryptomix-radABE95.tmp.exe   (97,792 bytes)
• 2017-01-10-2nd-run-page-from-msimechanical.com-with-injected-EITest-script.txt   (37,705 bytes)
• 2017-01-10-3rd-run-EITest-Rig-V-landing-page.txt   (5,182 bytes)
• 2017-01-10-3rd-run-EITest-Rig-V-payload-Cryptomix-rad8A3D1.tmp.exe   (98,304 bytes)
• 2017-01-10-3rd-run-page-from-nanotec.cnr.it-with-injected-EITest-script.txt   (91,163 bytes)
• 2017-01-10-all-3-runs-Cryptomix-decription-instructions.txt   (1,489 bytes)
• 2017-01-10-all-3-runs-EITest-Rig-V-artifact-QTTYUADAF.txt   (1,137 bytes)
• 2017-01-10-all-3-runs-EITest-Rig-V-flash-exploit.swf   (38,985 bytes)

BACKGROUND ON RIG EXPLOIT KIT:

• I'm routinely intercepting 2 versions of Rig EK as classified in an October 2016 blog post by Kafeine.
• Rig-V: a "VIP version" with new URL patterns and RC4 encryption for the payload.  Used by the Afraidgate, EITest, and pseudoDarkleech campaigns.
• Rig-E: a variant with old URL patterns, but uses with RC4 encryption for the payload.  Also known as Empire Pack.  I often see Rig-E used by the EITest campaign.

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.

BACKGROUND ON CRYPTOMIX RANSOMWARE:

• The ransomware I used to call CryptFile2 is actually CryptoMix.  Details can be found here.
• The EITest campaign currently uses Rig-V to send this CryptoMix (CryptFile2) ransomware.
• Some people might be tempted to call this "Lesli ransomware" based on LESLI SPYING ON YOU in the ransom note and the .lesli file extension it uses for encrypted files.
• Don't be fooled.  This is actually CryptoMix/CryptFile2 ransomware.
• I first saw the .lesli file extension used by CryptoMix last year on 2016-11-28.

Shown above:  Flowchart for this infection traffic.

 

TRAFFIC

Shown above:  Injected script from the EITest campaign from the compromised site, 1st run.

 

Shown above:  Pcap of the infection traffic filtered in Wireshark, 1st run.

 

Shown above:  Injected script from the EITest campaign from the compromised site, 2nd run.

 

Shown above:  Pcap of the infection traffic filtered in Wireshark, 2nd run.

 

Shown above:  Injected script from the EITest campaign from the compromised site, 3rd run.

 

Shown above:  Pcap of the infection traffic filtered in Wireshark, 3rd run.

 

ASSOCIATED DOMAINS:

• activaclinics.com - Compromised site (1st run)
• www.msimechanical.com - Compromised site (2nd run)
• nanotec.cnr.it - Compromised site (3rd run)

• 92.53.124.185 port 80 - new.fax.news - Rig-V (1st run)
• 92.53.124.185 port 80 - try.grandcanyon.news - Rig-V (2nd run)
• 92.53.124.185 port 80 - acc.hair.news - Rig-V (3rd run)

• 37.59.39.53 port 80 - 37.59.39.53 - CryptoMix post-infection traffic

• supl@post.com - first email from CryptoMix decryption instructions
• supl@oath.com - second email from CryptoMix decryption instructions

 

FILE HASHES

FLASH EXPLOIT:

• SHA256 hash:  8052c118e6e89ec4c18b25d43c5a9d692f3024352ceb2374587bba22b273ffb7   (38,985 bytes)
  File description:  Rig-V Flash exploit seen on 2017-01-10

PAYLOAD (CRYPTOMIX/CRYPTFILE2):

• SHA256 hash:  712619d14ca14bd8cb8e2f693fe9a49e2aefee72f489f3e25d846bdcb96527dd   (98,304 bytes)
  
• SHA256 hash:  8d4bd24a85aae5e1799b1ecfb9125613e89ab1e5ff9aa14957d27dde46d5409b   (97,792 bytes)
  
• SHA256 hash:  a4d79a7a2081d40fe4aab274c1680aa3ca8c02a840696d3fdb6f54df73f07807   (98,304 bytes)
  File path example:  C:\Users\[username]\AppData\Local\Temp\rad8A3D1.tmp.exe
  File path example:  C:\ProgramDataSpy Security SoftWare_f20de729_64c7afbe.exe

 

IMAGES

Shown above:  CryptoMix ransomware made persistent on the infected host.

 

Shown above:  CryptoMix ransomware made persistent on the infected host.

 

Shown above:  Some of alerts from the Emerging Threats and ETPRO rulesets using Sguil on Security Onion.

 

FINAL NOTES

Once again, here are the associated files:

• ZIP archive of the pcaps:  2017-01-10-EITest-Rig-V-sends-CryptoMix-all-3-pcaps.zip   755 kB (754,794 bytes)
• ZIP archive of the malware:  2017-01-10-EITest-Rig-V-sends-CryptoMix-malware-and-artifacts.zip   279 kB (277,807 bytes)

ZIP files are password-protected with the standard password.  If you don't know it, look at the "about" page of this website.

Click here to return to the main page.