2016-12-02 - PSEUDO-DARKLEECH RIG-V FROM 109.234.34.24 SENDS CERBER RANSOMWARE
ASSOCIATED FILES:
- ZIP archive of the pcap: 2016-12-02-pseudoDarkleech-Rig-V-sends-Cerber-ransomware.pcap.zip 397 kB (396,542 bytes)
- 2016-12-02-pseudoDarkleech-Rig-V-sends-Cerber-ransomware.pcap (525,203 bytes)
- ZIP archive of the malware: 2016-12-02-pseudoDarkleech-Rig-V-sends-Cerber-malware-and-artifacts.zip 576 kB (576,385 bytes)
- 2016-12-02-Cerber-decryption-instructions.bmp (1,920,054 bytes)
- 2016-12-02-Cerber-decryption-instructions_README_NLKQ49Z_.hta (67,748 bytes)
- 2016-12-02-page-from-paracordtutorials.com-with-injected-script.txt (92,328 bytes)
- 2016-12-02-pseudoDarkleech-Rig-V-artifact-MXj6sFosp.txt (1,137 bytes)
- 2016-12-02-pseudoDarkleech-Rig-V-flash-exploit.swf (10,096 bytes)
- 2016-12-02-pseudoDarkleech-Rig-V-landing-page.txt (90,277 bytes)
- 2016-12-02-pseudoDarkleech-Rig-V-payload-Cerber-radEB1A6.tmp.exe (293,656 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 (CryptoMix) 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:
- Looks like Cerber ransomware got a facelift since the last time I checked. No more version numbers in the instructions.
- At first glance, there's no fundamental changes, but this version of Cerber is no longer version 5.0.1.
- @Oddly_Normal has also seen this and posted an example of the infection traffic. (link).
Shown above: Add some green, and you'll have a Christmas-themed ransomware screen!
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.paracordtutorials.com - Compromised site
- 109.234.34.24 port 80 - f6pv.canadasmartplan.com - Rig-V
- 15.49.2.0 to 15.49.2.31 (15.49.2.0/27) UDP port 6892 - Cerber post-infection UDP traffic
- 122.1.13.0 to 122.1.1331 (122.1.13.0/27) UDP port 6892 - Cerber post-infection UDP traffic
- 194.165.16.0 to 194.165.17.255 (194.165.16.0/23) UDP port 6892 - Cerber post-infection UDP traffic
- 104.36.83.121 port 80 - ffoqr3ug7m726zou.zh5mu9.bid - Cerber post-infection HTTP traffic
FILE HASHES
FLASH EXPLOIT:
- SHA256 hash: 1f593737d5850d0b854d6f1f3fd8977b56bef479c14558339b0dad4a1d466647 (10,096 bytes)
File name: 2016-12-02-pseudoDarkleech-Rig-V-flash-exploit.swf
PAYLOAD (CERBER RANSOMWARE):
- SHA256 hash: 51939ec8bc405cddcbf4f8762c4da5d54d4be7a20bf60cd5ef8971dd80e70c67 (293,656 bytes)
File name: C:\Users\[Username]\AppData\Local\Temp\radEB1A6.tmp.exe
IMAGES
Shown above: Desktop of an infected Windows host after checking the decryption instructions.
Shown above: .8637 was the extension for the files encrypted during this infection.
FINAL NOTES
Once again, here are the associated files:
- ZIP archive of the pcap: 2016-12-02-pseudoDarkleech-Rig-V-sends-Cerber-ransomware.pcap.zip 397 kB (396,542 bytes)
- ZIP archive of the malware: 2016-12-02-pseudoDarkleech-Rig-V-sends-Cerber-malware-and-artifacts.zip 576 kB (576,385 bytes)
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