2017-01-24 - EITEST RIG-V FROM 89.223.29[.]254 SENDS CRYPTOMIX 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:

• 2017-01-24-EITest-Rig-V-sends-CryptoMix-ransomware.pcap.zip   271 kB (271,437 bytes)

• 2017-01-24-EITest-Rig-V-sends-CryptoMix-ransomware.pcap   (337,035 bytes)

• 2017-01-24-EITest-Rig-V-artifacts-and-CryptoMix-ransomware.zip   100.6 kB (100,569 bytes)

• 2017-01-24-CryptoMix-ransomware-INSTRUCTION_RESTORE_FILE.TXT   (1,429 bytes)
• 2017-01-24-EITest-Rig-V-artifact-QTTYUADAF.txt   (1,137 bytes)
• 2017-01-24-EITest-Rig-V-flash-exploit.swf   (14,387 bytes)
• 2017-01-24-EITest-Rig-V-landing-page.txt   (5,208 bytes)
• 2017-01-24-EITest-Rig-V-payload-CryptoMix-ransomware-rad1B3DE.tmp.exe   (108,032 bytes)
• 2017-01-24-page-from-activaclinics_com-with-injected-EITest-script.txt   (59,331 bytes)

BACKGROUND ON RIG EXPLOIT KIT:

• I usually run across 2 versions of Rig EK:  Rig-V (Rig 4.0) and Rig-E (Empire Pack).
• Rig-V is what security researchers called Rig EK version 4 when it was only accessible by "VIP" customers, while the old version (Rig 3) was still in use.
• I currently call it "Rig-V" out of habit.
• The proper name for Rig-E is "Empire Pack".  Empire Pack a variant of Rig EK as described by Kafeine here.
• I haven't seen Empire Pack traffic in 2017 yet, but I often see it from the EITest campaign (when EITest is distributing something other than CryptoMix/CryptFile2 ransomware or Cerber ransomware).

BACKGROUND ON THE EITEST CAMPAIGN:

• My most recent write-up on the EITest campaign can be found here.

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.
• CryptoMix currently uses .rdmk as the file extension for any encrypted files.

Shown above:  Flowchart for this infection traffic.

 

TRAFFIC

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

 

Shown above:  Pcap of the infection traffic filtered in Wireshark.

 

ASSOCIATED DOMAINS:

• activaclinics[.]com - Compromised site
• 89.223.29[.]254 port 80 - park.hospitality-health[.]us - Rig-V
• 62.138.9[.]39 port 80 - 62.138.9[.]39 - CryptoMix ransomware post-infection traffic

• supls@post[.]com - first email from CryptoMix ransomware decryption instructions
• supls@oath[.]com - second email from CryptoMix ransomware decryption instructions

 

FILE HASHES

FLASH EXPLOIT:

• SHA256 hash:  4a0b2c03d76217242a29d7a9bb4f6979d75fab3e40a1c3dbb19a2b5de45e3afb   (14,387 bytes)
  File description:  Rig-V Flash exploit seen on 2017-01-24

PAYLOAD (CRYPTOMIX/CRYPTFILE2 RANSOMWARE):

• SHA256 hash:  a9a232cbff2c4347c1fcdeb1a3f1a6e45fbd4e93a107c6dd57fb8994df9d3bce   (108,032 bytes)
  File path example:  C:\Users\[username]\AppData\Local\Temp\rad1B3DE.tmp.exe

 

IMAGES

Shown above:  Desktop of the infected Windows host.

 

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