2016-12-22 - PSEUDO-DARKLEECH RIG-V FROM 92.53.119.238 SENDS CERBER RANSOMWARE

ASSOCIATED FILES:

• ZIP archive of the pcap:  2016-12-22-pseudoDarkleech-Rig-V-sends-Cerber-ransomware.pcap.zip   587 kB (586,606 bytes)

• 2016-12-22-pseudoDarkleech-Rig-V-sends-Cerber-ransomware.pcap   (714,542 bytes)

• ZIP archive of the malware:  2016-12-22-pseudoDarkleech-Rig-V-sends-Cerber-malware-and-artifacts.zip   547 kB (546,530 bytes)

• 2016-12-22-Cerber-decryption-instructions_README_7ZYZI_.hta   (66,409 bytes)
• 2016-12-22-Cerber-decryption-instructions_README_7ZYZI_.jpg   (238,824 bytes)
• 2016-12-22-page-from-tlcbarandgrill.com-with-injected-pseudoDarkleech-script.txt   (17,842 bytes)
• 2016-12-22-pseudoDarkleech-Rig-V-artifact-OTTYUADAF.txt   (1,137 bytes)
• 2016-12-22-pseudoDarkleech-Rig-V-flash-exploit.swf   (13,700 bytes)
• 2016-12-22-pseudoDarkleech-Rig-V-landing-page.txt   (5,381 bytes)
• 2016-12-22-pseudoDarkleech-Rig-V-payload-Cerber-rad779E1.tmp.exe   (286,086 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 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

OTHER NOTES:

• My thanks to Justin Ragghianti who tweeted about the compromised site.

Shown above:  Justin's tweet on the compromised site.

 

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:

• tlcbarandgrill.com - Compromised site
• 92.53.119.238 port 80 - art.flightsgirl.com - Rig-V
• 33.22.15.0 to 33.22.15.31 (33.22.15.0 /27) UDP port 6892 - Cerber post-infection UDP traffic
• 33.22.16.0 to 33.22.16.31 (33.22.16.0 /27) UDP port 6892 - Cerber post-infection UDP traffic
• 91.239.24.0 to 91.239.25.255 (91.239.24.0/23) UDP port 6892 - Cerber post-infection UDP traffic
• 23.152.0.167 port 80 - ffoqr3ug7m726zou.199ovv.top - Cerber post-infection HTTP traffic

 

FILE HASHES

FLASH EXPLOIT:

• SHA256 hash:  ce4eacb09dc69865c718f7bda3296d535ad71661867129bdd5539014c42f2d65   (13,700 bytes)
  File description:  Rig-V Flash exploit seen on 2016-12-22

PAYLOAD (CERBER RANSOMWARE):

• SHA256 hash:  2d3b5e053e27008d1275bcc478861d02338132c8145058d9bb3af09d31874360   (238,824 bytes)
  File path:  C:\Users\[Username]\AppData\Local\Temp\rad779E1.tmp.exe

 

IMAGES

Shown above:  Desktop of an infected Windows host.

 

FINAL NOTES

Once again, here are the associated files:

• ZIP archive of the pcap:  2016-12-22-pseudoDarkleech-Rig-V-sends-Cerber-ransomware.pcap.zip   587 kB (586,606 bytes)
• ZIP archive of the malware:  2016-12-22-pseudoDarkleech-Rig-V-sends-Cerber-malware-and-artifacts.zip   547 kB (546,530 bytes)

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