2016-06-15 - SUNDOWN EK FROM 45.63.26[.]202 SENDS FLASH AND SILVERLIGHT EXPLOITS

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:

• 2016-06-15-Sundown-EK-traffic.pcap.zip   416.5 kB (416,484 bytes)

• 2016-06-15-Sundown-EK-traffic.pcap   (530,934 bytes)

• 2016-06-15-Sundown-EK-malware-and-artifacts.zip   223.6 kB (223,567 bytes)

• 2016-06-15-Sundown-EK-flash-exploit.swf   (38,603 bytes)
• 2016-06-15-Sundown-EK-landing-page-first-example.txt   (89,128 bytes)
• 2016-06-15-Sundown-EK-landing-page-second-example.txt   (95,001 bytes)
• 2016-06-16-Sundown-EK-payload.exe   (126,976 bytes)
• 2016-06-16-Sundown-EK-silverlight-exploit.zip   (20,412 bytes)

 

NOTES:

• I'd heard about Sundown EK for a while, but I never personally intercepted any of it.  Last year, Virus Bulletin examined the same exploit kit and called it "Beta Exploit Pack." Traffic patterns for Sundown EK have changed, I think, since the last time anything substantial was published about it (that I could find) in December 2015.

• Sundown EK timeline:

• 2015-06-08: Malware Don't Need Coffee blog - Fast look at Sundown EK.   (link)
• 2015-06-18: Virus Bulletin - Beta exploit pack: one more piece of crimeware for the infection road!   (link)
• 2015-06-25: Proofpoint blog: Sundown EK Spreads LuminosityLink RAT: Light After Dark.   (link)
• 2015-12-27: Threatglass post with malicious traffic caused by foromtb[.]com.   (link)

• Today, Sundown EK sent a Silverlight exploit similar to one I saw for Rig EK on 2016-03-31 (also probably for CVE-2016-0034).

Shown above:  A note about Sundown EK shamelessly stealing from other EKs.

• Thanks to Jérôme Segura for his help, which allowed me to get today's traffic.

 

TRAFFIC

SUNDOWN EK DOMAIN NAMES FROM THE TRAFFIC:

• 45.63.26[.]202 port 80 - ayuegdsfugasfugausdkiga[.]xyz
• 45.63.26[.]202 port 80 - dahip0aedghigdasphdkiga[.]xyz
• 45.63.26[.]202 port 80 - dashpsadfoihpidfas[.]xyz
• 45.63.26[.]202 port 80 - dasoifhsadoihdiasf[.]xyz
• 45.63.26[.]202 port 80 - trasergsgfsdx[.]xyz

 

IMAGES

Shown above:  Injected script in page from compromised website leading to Sundown EK.

 

Shown above:  Sundown EK traffic filtered in Wireshark.

 

Shown above:  One of the Sundown EK landing pages.

 

Shown above:  Sundown EK sends Flash exploit.

 

Shown above:  Sundown EK sends Silverlight exploit.

 

Shown above:  Sundown EK sends malware payload.

 

Shown above:  Notable alerts on the infection traffic in Security Onion using Suricata and the EmergingThreats Pro ruleset.

 

Shown above:  Notable alerts on the traffic in Snort using the Snort subscriber ruleset.

 

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