2016-12-21 - PSEUDO-DARKLEECH RIG-V FROM 195.133.201[.]36 SENDS CERBER 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:

• ZIP archive of the pcap:  2016-12-21-pseudoDarkleech-Rig-V-sends-Cerber-ransomware.pcap.zip   386 kB (386,220 bytes)

• 2016-12-21-pseudoDarkleech-Rig-V-sends-Cerber-ransomware.pcap   (449,018 bytes)

• ZIP archive of the malware:  2016-12-21-pseudoDarkleech-Rig-V-and-Cerber-ransomware-files.zip   600.0 kB (600,011 bytes)

• 2016-12-21-Cerber-ransomware-decryption-instructions_README_LQ56_.hta   (66,409 bytes)
• 2016-12-21-Cerber-ransomware-decryption-instructions_README_LQ56_.jpg   (305,430 bytes)
• 2016-12-21-page-from-laykni_com-with-injected-pseudoDarkleech-script.txt   (46,665 bytes)
• 2016-12-21-pseudoDarkleech-Rig-V-artifact-OTTYUADAF.txt   (1,137 bytes)
• 2016-12-21-pseudoDarkleech-Rig-V-flash-exploit.swf   (14,088 bytes)
• 2016-12-21-pseudoDarkleech-Rig-V-landing-page.txt   (5,383 bytes)
• 2016-12-21-pseudoDarkleech-Rig-V-payload-Cerber-ransomware-rad0FB04.tmp.exe   (292,324 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 Baber, who emailed me information about the compromised website used to kick off this infection traffic.

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:

• laykni[.]com - Compromised site
• 195.133.201[.]36 port 80 - art.2survival[.]com - Rig-V
• 77.4.1[.]0 to 77.4.1[.]31 (77.4.1[.]0/27) UDP port 6892 - Cerber ransomware post-infection UDP traffic
• 91.239.24[.]0 to 91.239.25[.]255 (91.239.24[.]0/23) UDP port 6892 - Cerber ransomware post-infection UDP traffic
• 84.200.4[.]130 port 80 - ffoqr3ug7m726zou.1bpfr1[.]top - Cerber ransomware post-infection HTTP traffic

 

FILE HASHES

FLASH EXPLOIT:

• SHA256 hash:  0744ba67c5f8210fcdcf4acb328df68780e96d10f2c68b8eddbb9a355bca213e   (14,088 bytes)
  File description:  Rig-V Flash exploit seen on 2016-12-21

PAYLOAD (CERBER RANSOMWARE):

• SHA256 hash:  35167e6aab373740e63cfe77a8aa28a9d2cdb759dad57e8027373c87e9d1d7ef   (292,324 bytes)
  File path:  C:\Users\[Username]\AppData\Local\Temp\rad0FB04.tmp.exe

 

IMAGES

Shown above:  Desktop of an infected Windows host.

 

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