2016-12-09 - AFRAIDGATE RIG-V FROM 109.234.35[.]39 SENDS "OSIRIS" VARIANT LOCKY 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:

• 2016-12-09-Afraidgate-Rig-V-sends-Locky-ransomware.pcap.zip   278.8 kB (278,802 bytes)

• 2016-12-09-Afraidgate-Rig-V-sends-Locky-ransomware.pcap   (356,261 bytes)

• 2016-12-09-Afraidgate-Rig-V-and-Locky-ransomware-files.zip   235.9 kB (235,935 bytes)

• 2016-12-09-Afraidgate-Rig-V-artifact-QXj6sFosp.txt   (1,137 bytes)
• 2016-12-09-Afraidgate-Rig-V-flash-exploit.swf   (17,644 bytes)
• 2016-12-09-Afraidgate-Rig-V-landing-page.txt   (5,389 bytes)
• 2016-12-09-Afraidgate-Rig-V-payload-Locky-ransomware-radB6595.tmp.exe   (211,456 bytes)
• 2016-12-09-coordinates.broowns_com-engine-lib-external-jquery-jquery.charcount.js.txt   (464 bytes)
• 2016-12-09-Locky-ransomware-DesktopOSIRIS.bmp   (3,578,902 bytes)
• 2016-12-09-Locky-ransomware-DesktopOSIRIS.htm   (8,007 bytes)
• 2016-12-09-Locky-ransomware-Decryptor-style.css   (3,422 bytes)
• 2016-12-09-Locky-ransomware-Decryptor.html   (6,400 bytes)

NOTES:

• I found today's compromised website from a tweet sent by @killamjr.

BACKGROUND ON RIG EXPLOIT KIT:

• I'm currently tracking 3 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.
• Rig standard: uses new URL patterns introduced by Rig-V, but old obfuscation (ASCII string to XOR the payload binary)  The EITest campaign formerly used Rig standard to send CryptFile2 (CryptoMix) ransomware before switching to Rig-V for that purpose.

BACKGROUND ON THE AFRAIDGATE CAMPAIGN:

• My most recent in-depth write-up on the Afraidgate campaign can be found here.

 

Shown above:  Flowchart for this infection traffic.

 

TRAFFIC

Shown above:  Page from the compromised website with injected script leading to the Afraidgate redirect URL.

 

Shown above:  Afraidgate redirect URL leading to the Rig-V landing page.

 

Shown above:  Traffic from the pcap filtered in Wireshark.

 

ASSOCIATED DOMAINS:

• assetlabs[.]com - Compromised website
• 138.68.144[.]43 port 80 - coordinates.broowns[.]com - GET /engine/lib/external/jquery/jquery.charcount.js - Afraidgate redirect
• 109.234.35[.]39 port 80 - top.marbleheadestates[.]com - Rig-V
• 176.121.14[.]95 port 80 - 176.121.14[.]95 - POST /checkupdate - Locky ransomware post-infection callback
• 185.102.136[.]67 port 80 - 185.102.136[.]67 - POST /checkupdate - Locky ransomware post-infection callback

TOR DOMAIN FROM THE DECRYPT INSTRUCTIONS:

• g46mbrrzpfszonuk[.]onion

 

FILE HASHES

RIG-V FLASH EXPLOIT:

• SHA256 hash:  6f1b0fede1c65b0aefe252b7486f494a2b79052c03d4de9f1814e3a400cb0886   (17,644 bytes)
  File name:  2016-12-09-Afraidgate-Rig-V-flash-exploit.swf

RIG EK PAYLOAD (LOCKY RANSOMWARE):

• SHA256 hash:  803a9fdb26c22ecd599f25f30e79c4914c75e45c2613718c4a25b16112222726   (211,456 bytes)
  File name:  C:\Users\[username]\AppData\Local\Temp\radB6595.tmp.exe

 

IMAGES

Shown above:  Desktop of an infected Windows host after rebooting.  This is the most recent variant of Locky ransomware (the "Osiris" variant).

 

Shown above:  Checking the Locky ransomware decryptor page to find the ransom payment (1.5 bitcoin).

 

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