2018-01-09 - SEAMLESS CAMPAIGN CONTINUES USING RIG EK TO SEND RAMNIT

ASSOCIATED FILES:

• Zip archive of the pcap:  2018-01-09-Seamless-campaign-Rig-EK-sends-Ramnit.pcap.zip   1.9 MB (1,850,410 bytes)

• 2018-01-09-Seamless-campaign-Rig-EK-sends-Ramnit.pcap   (2,783,529 bytes)

• Zip archive of the artifacts and malware:  2018-01-09-Seamless-campaign-Rig-EK-artifacts-and-malware.zip   167 kB (166,763 bytes)

• 2018-01-09-Rig-EK-artifact-o32.tmp.txt   (1,141 bytes)
• 2018-01-09-Rig-EK-flash-exploit.swf   (13,895 bytes)
• 2018-01-09-Rig-EK-landing-page.txt   (97,319 bytes)
• 2018-01-09-Seamless-campaign-Rig-EK-payload-Ramnit.exe   (167,424 bytes)

 

NOTES:

• Thanks to @jeromesegura for reminding me that Seamless is using punycode for the URLs before Rig EK.
• Also thanks to @nao_sec. @DynamicAnalysis, @BroadAnalysis, and @Zerophage1337, who have posted pcaps of Rig EK traffic on their respective blogs.
• Finally, thanks to others like @anyrun_app, @cyber_attacks, @VK_Intel, and @thlnk3r who have tweeted or published information about Rig EK in recent months.
• Search Twitter for #RigEK, sort by latest, and you'll find some of the most recent data out there on Rig EK.

 

DOCUMENTATION ON THE SEAMLESS CAMPAIGN:

• 2017-03-29 - Cisco Umbrella Blog - 'Seamless' campaign delivers Ramnit via Rig EK
• 2017-05-11 - ISC Diary - Seamless Campaign using Rig Exploit Kit to send Ramnit Trojan
• 2017-05-17 through 2017-11-12 - Malware Breakdown - various blog posts on the Seamless campaign
• 2017-06-02 - Malware-Traffic-Analysis.net - Seamless campaign continues using Rig EK to send Ramnit
• 2017-08-25 - Malware-Traffic-Analysis.net - Seamless campaign Rig EK sends Ramnit
• 2017-09-07 through 2017-11-10 - Broadanalysis.com - various blog posts titled: Rig Exploit Kit via Seamless malvertising delivers Ramnit banking malware
• 2017-12-04 - MalwareBytes blog - Seamless campaign serves RIG EK via Punycode
• 2017-12-25 - traffic.moe - Seamless->RigEK->Ramnit
• 2018-01-09 - app.any.run - Analysis of Rig Exploit Kit.html
• 2018-01-09 - traffic.moe - Seamless->RigEK->Ramnit

 

WEB TRAFFIC BLOCK LIST

Indicators are not a block list.  If you feel the need to block web traffic, I suggest the following domain:

• xn--b1aanbboc3ad8jee4bff.xn--p1ai
• ccookd72yyeuj6y.com

 

TRAFFIC

Shown above:  Infection traffic in Wireshark.

 

INFECTION TRAFFIC:

• 31.31.196.182 port 80 - xn--b1aanbboc3ad8jee4bff.xn--p1ai - GET /gav4.php
• 188.225.86.89 port 80 - 188.225.86.89 - Rig EK
• Attempted connections to google.com caused by Ramnit
• 195.133.1.37 port 443 - ccookd72yyeuj6y.com - encoded traffic caused by Ramnit (not HTTPS/SSL/TLS)
• 207.244.112.70 port 4000 - encoded traffic (not HTTPS/SSL/TLS)
• 207.244.112.70 port 4001 - encoded traffic (not HTTPS/SSL/TLS)

 

MALWARE

RIG EK FLASH EXPLOIT:

• SHA256 hash:  b8408fbe0c46d124ccd7ef96a9084663a43d630fdfb9e987657f7447ca27b13a
  File size:  13,895 bytes

RIG EK PAYLOAD - RAMNIT:

• SHA256 hash:  4ecba920d0da06a821be364998083d4d2b1ea5014243a81e46c6c036d0e03662
  File size:  167,424 bytes
  File location:  C:\Users\[username]\AppData\Local\Temp\bilo458.exe
  File location:  C:\Users\[username]\AppData\Local\Temp\ktfpuxkb.exe
  File location:  C:\Users\[username]\AppData\Local\Temp\ramissyv.exe
  File location:  C:\Users\[username]\AppData\Local\Temp\vvxpiiaa.exe
  File location:  C:\Users\[username]\AppData\Local\wdxyjubt\bxnknleu.exe

 

IMAGES

Shown above:  Some alerts from Sguil in Security Onion using Suricata and the EmergingThreats Pro (ETPRO) ruleset.

 

Shown above:  Some alerts on the infection traffic from the Snort subscriber ruleset when reading the pcap with Snort 2.9.11.

 

Shown above:  Registry key on the infected Windows host updated for malware persistence.

 

Shown above:  There's also a link in the Startup folder from the Start Menu
to keep the malware persistent.

 

FINAL NOTES

Once again, here are the associated files:

• Zip archive of the pcap:  2018-01-09-Seamless-campaign-Rig-EK-sends-Ramnit.pcap.zip   1.9 MB (1,850,410 bytes)
• Zip archive of the artifacts and malware:  2018-01-09-Seamless-campaign-Rig-EK-artifacts-and-malware.zip   167 kB (166,763 bytes)

ZIP files are password-protected with the standard password.  If you don't know it, look at the "about" page of this website.

Click here to return to the main page.