2017-03-02 - NEBULA EK SENDS DIAMONDFOX MALWARE

ASSOCIATED FILES:

• ZIP archive of the pcaps:  2017-03-02-Nebula-EK-pcaps.zip   1.9 MB (1,859,168 bytes)

• 2017-03-02-Nebula-EK-1st-run.pcap   (1,117,128 bytes)
• 2017-03-02-Nebula-EK-2nd-run.pcap   (425,928 bytes)
• 2017-03-02-Nebula-EK-3rd-run.pcap   (141,828 bytes)
• 2017-03-02-Nebula-EK-4th-run.pcap   (155,956 bytes)
• 2017-03-02-Nebula-EK-5th-run.pcap   (216,042 bytes)

ZIP archive of the malware:  2017-03-02-Nebula-EK-malware-and-artifacts.zip   356 kB (356,084 bytes)

• 2017-03-02-Nebula-EK-flash-exploit-1-of-2.swf   (45,026 bytes)
• 2017-03-02-Nebula-EK-flash-exploit-2-of-2.swf   (21,100 bytes)
• 2017-03-02-Nebula-EK-landing-page-1-of-2.txt   (55,002 bytes)
• 2017-03-02-Nebula-EK-landing-page-2-of-2.txt   (33,167 bytes)
• 2017-03-02-Nebula-EK-payload-DiamondFox.exe   (208,896 bytes)
• 2017-03-02-page-from-hurtmehard.net-with-injected-script-1st-run.txt   (188,732 bytes)
• 2017-03-02-page-from-hurtmehard.net-with-injected-script-2nd-run.txt   (188,851 bytes)
• 2017-03-02-page-from-hurtmehard.net-with-injected-script-3rd-run.txt   (188,994 bytes)
• 2017-03-02-page-from-hurtmehard.net-with-injected-script-4th-run.txt   (189,361 bytes)
• 2017-03-02-page-from-hurtmehard.net-with-injected-script-5th-run.txt   (188,968 bytes)

BACKGROUND ON NEBULA EK:

• Kafeine posted a blog about Nebula EK earlier today: link.
• Nebula EK is a Sundown EK variant.
• Detection-wise it matches Sundown EK, so it's feels to me like someone took Sundown EK and rebranded it as Nebula EK (see Kafeine's blog for details).

OTHER NOTES:

• Was able to generate this traffic thanks to @St3f4nMZ, who tweeted about it earlier today (link).

 

TRAFFIC

Shown above:  An example of injected script in a page from the compromised site.

 

Shown above:  Pcap of the infection traffic filtered in Wireshark.

 

ASSOCIATED DOMAINS:

• hurtmehard.net - Compromised site
• 93.190.141.39 port 80 - ehpcc.chggannel.stream - Nebula EK
• 93.190.141.200 port 80 - millenniumcollege.tboapfmsyu.stream - Nebula EK
• 93.190.141.39 port 80 - mistmessage.commissionlegshoemaker.bid - Nebula EK
• 93.190.141.39 port 80 - offertom-tom.commissionlegshoemaker.bid - Nebula EK
• 93.190.141.166 port 80 - qgg.losssubwayquilt.pw - Nebula EK (payload)
• 212.92.127.223 port 80 - slphstvz.biz - DiamondFox post-infection traffic

 

NEBULA EK LANDING PAGE URLS:

• ehpcc.chggannel.stream - GET /2001/08/25/sailor-emery-wool
• ehpcc.chggannel.stream - GET /Vk2awIRGkB/ODU5FAUJAH/55de484f0c838ac/index.php?showtopic=18385
• millenniumcollege.tboapfmsyu.stream - GET /eg9tx1iPyH/6582721795292536603/print.php?sid=autogrow
• millenniumcollege.tboapfmsyu.stream - GET /e3/8315423913542352129/shop/index.php?cPath=11e456e3ef883bff109ca96bfd36912602995ed5c5f5265ba8
  789bce3ccc9ef7bfe5fc9e0142158213d88ed0bb72b1a35908f8fb6d7050b0f4aed1b9c5b9ae5d
• mistmessage.commissionlegshoemaker.bid - GET /2008/08/23/own-comparison-banker
• offertom-tom.commissionlegshoemaker.bid - GET /41037539208231165093/RLtFKfZyfK/showthread.php?t=17704&page=3
• offertom-tom.commissionlegshoemaker.bid - GET /ans/showpost.php?s=b02a8554744141829dd099670b93b968&p=7&postcount=6
• offertom-tom.commissionlegshoemaker.bid - GET /273295016206496/611280788064531/819981062048224/showthread.php?t=16711&page=22

 

NEBULA EK FLASH EXPLOIT URLS:

• millenniumcollege.tboapfmsyu.stream - GET /F1X/?9643522803
• mistmessage.commissionlegshoemaker.bid - GET /F1X/?9643522803
• offertom-tom.commissionlegshoemaker.bid - GET /F1X/?9643522803
• millenniumcollege.tboapfmsyu.stream - GET /F1X/?947545190441
• mistmessage.commissionlegshoemaker.bid - GET /F1X/?947545190441
• offertom-tom.commissionlegshoemaker.bid - GET /F1X/?947545190441

 

NEBULA EK PAYLOAD URLS:

• qgg.losssubwayquilt.pw - GET /00.php

 

FILE HASHES

FLASH EXPLOIT:

• SHA256 hash:  67d598c6acbd6545ab24bbd44cedcb825657746923f47473dc40d0d1f122abb6
  File size:  45,026 bytes
  File description:  First Nebula/Sundown EK flash exploit seen on 2017-03-02

• SHA256 hash:  be86dc88e6337f09999991c206f890e0d52959d41f2bb4c6515b5442b23f2ecc
  File size:  21,100 bytes
  File description:  Second Nebula/Sundown EK flash exploit seen on 2017-03-02

PAYLOAD:

• SHA256 hash:  6764f98ba6509b3351ad2f960dcc47c27d0dc00d53d7e0ae132a7c1d15067f4a
  File size:  208,896 bytes
  File location example:  C:\Users\[username]\AppData\Local\Temp\hkikofzg.exe
  File location example:  C:\Users\[username]\AppData\Local\Temp\k4ms2o40.exe
  File location example:  C:\Users\[username]\AppData\Local\Temp\lpt8.{20D04FE0-3AEA-1069-A2D8-08002B30309D}\spoolsv.exe
  File description:  Nebula EK payload (DiamondFox malware) seen on 2017-03-02

 

IMAGES

Shown above:  Alerts on the traffic from the ETPRO ruleset using Sguil on Security Onion.

 

Shown above:  Malware made persistent on the infected Windows host.

 

Shown above:  Some processes related to the infection.

 

Shown above:  The infected host reporting keylogging data (not included in the pcaps).

 

FINAL NOTES

Once again, here are the associated files:

• ZIP archive of the pcaps:  2017-03-02-Nebula-EK-pcaps.zip   1.9 MB (1,859,168 bytes)
• ZIP archive of the malware:  2017-03-02-Nebula-EK-malware-and-artifacts.zip   356 kB (356,084 bytes)

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