2016-11-28 - PSEUDO-DARKLEECH RIG-V FROM 194.87.238.156 SENDS CERBER RANSOMWARE
ASSOCIATED FILES:
- ZIP archive of the pcap: 2016-11-28-2nd-run-pseudoDarkleech-Rig-V-sends-Cerber-ransomware.pcap.zip 389 kB (388,757 bytes)
- 2016-11-28-2nd-run-pseudoDarkleech-Rig-V-sends-Cerber-ransomware.pcap (509,913 bytes)
- ZIP archive of the malware: 2016-11-28-2nd-run-pseudoDarkleech-Rig-V-sends-Cerber-malware-and-artifacts.zip 565 kB (564,533 bytes)
- 2016-11-28-2nd-run-page-from-wordtemplates.org-with-injected-script.txt (54,453 bytes)
- 2016-11-28-2nd-run-pseudoDarkleech-Rig-V-artifact-MXj6sFosp.txt (1,137 bytes)
- 2016-11-28-2nd-run-pseudoDarkleech-Rig-V-flash-exploit.swf (12,174 bytes)
- 2016-11-28-2nd-run-pseudoDarkleech-Rig-V-landing-page.txt (90,012 bytes)
- 2016-11-28-2nd-run-pseudoDarkleech-Rig-V-payload-Cerber-radC2813.tmp.exe (284,505 bytes)
- 2016-11-28-Cerber-decryption-instructions.bmp (1,920,054 bytes)
- 2016-11-28-Cerber-decryption-instructions_README_.hta (67,727 bytes)
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, different landing page obfuscation, and RC4 encryption for the payload. Used by the Afraidgate & pseudoDarkleech campaigns.
- Rig-E: a variant with old URL patterns, now with with RC4 encryption for the payload. Also known as Empire Pack. I often see Rig-E used by the pseudoDarkleech campaign.
- Rig standard: uses new URL patterns introduced by Rig-V, but old obfuscation (ASCII string to XOR the payload binary). The pseudoDarkleech campaign formerly used Rig standard to send CryptFile2 (Cerber) ransomware before switching to Rig-V for that purpose.
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
CERBER UPDATED:
- Cerber ransomware recently transitioned from version 4 to version 5 (link). Today I saw version 5.0.1.
- No drastic changes for network traffic associated with Cerber ransomware. Just a change in the UDP traffic (see below).
Shown above: Flowchart for this infection traffic.
TRAFFIC
Shown above: Injected script from the pseudoDarkleech campaign from the compromised site.
Shown above: Pcap of the infection traffic filtered in Wireshark.
ASSOCIATED DOMAINS:
- www.wordtemplates.org - Compromised site
- 194.87.238.156 port 80 - try.uludan.com - Rig-V
- 192.168.0.0 to 192.168.0.31 (192.168.0.0/27) UDP port 6892 - Cerber post-infection UDP traffic
- 194.165.16.0 to 194.165.17.255 (195.165.16.0/23) UDP port 6892 - Cerber post-infection UDP traffic
- 210.16.101.23 port 80 - ffoqr3ug7m726zou.ejc92c.top - Cerber post-infection HTTP traffic
FILE HASHES
FLASH EXPLOIT:
- SHA256 hash: a51c4a6e8797b75620efb64edf297bd2137230a45c18d96f66a3e9edbe988403
File name: 2016-11-28-2nd-run-pseudoDarkleech-Rig-V-flash-exploit.swf (12,174 bytes)
PAYLOAD (CERBER RANSOMWARE):
- SHA256 hash: 222bb4e588b0865f36047b4eb2e725c715a289898bc630b1245c46a0289522ff
File name: C:\Users\[Username]\AppData\Local\Temp\radC2813.tmp.exe (284,505 bytes)
IMAGES
Shown above: Desktop of an infected Windows host after checking the decryption instructions.
FINAL NOTES
Once again, here are the associated files:
- ZIP archive of the pcap: 2016-11-28-2nd-run-pseudoDarkleech-Rig-V-sends-Cerber-ransomware.pcap.zip 389 kB (388,757 bytes)
- ZIP archive of the malware: 2016-11-28-2nd-run-pseudoDarkleech-Rig-V-sends-Cerber-malware-and-artifacts.zip 565 kB (564,533 bytes)
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