2018-01-12 - MALSPAM PUSHING NANOCORE RAT

ASSOCIATED FILES:

• Zip archive of the pcap:  2018-01-12-NanoCore-RAT-traffic.pcap.zip   379 kB (378,983 bytes)

• 2018-01-12-NanoCore-RAT-traffic.pcap   (415,958 bytes)

• Zip archive of the email and malware:  2018-01-12-NanoCore-RAT-email-malware-and-artifacts.zip   2.0 MB (1,956,304 bytes)

• 2018-01-11-malspam-pushing-NanoCore-RAT-0034-UTC.txt   (635,772 bytes)
• TNT SHIPMENT INFORMATION.exe   (1,968,344 bytes)
• TNT SHIPMENT INFORMATION.r14   (466,579 bytes)
• filename.exe   (1,968,344 bytes)
• filename.vbs   (1,016 bytes)

 

EMAIL

Shown above:  Screenshot of the email.

 

EMAIL INFORMATION:

• Date:  Thursday, 2018-01-10 at 00:34 UTC
• Subject:  TNT Express Delivery Notification for 58718
• From:  "TNT Logistics" <tntexpress9@post.com>
• Message-ID:  <trinity-26dc5425-03cf-4e37-af49-ca5a58ee7118-1515630841229@3c-app-mailcom-lxa11>
• Attachment name:  TNT SHIPMENT INFORMATION.r14

 

Shown above:  Extracting the malware from the attached RAR archive.

 

TRAFFIC

Shown above:  Infection traffic in Wireshark.

 

INFECTION TRAFFIC:

• 178.175.138.133 port 1012 - encoded or encrypted TCP traffic caused by NanoCore RAT

 

MALWARE

RAR ARCHIVE FROM LINK IN THE EMAIL:

• SHA256 hash:  6d9a8f316d3888ce833c47bd80fca2533a2a6997b76d89f3ab9d661bd5803ad5
  File size:  466,579 bytes
  File name:  TNT SHIPMENT INFORMATION.r14

EXE FILE (NANOCORE RAT) EXTRACTED FROM THE RAR ARCHIVE:

• SHA256 hash:  95975fb33ea3a2488e9621baeba7468cfc5421562c0c5518cfe2d5d029e92fac
  File size:  1,968,344 bytes
  File name:  TNT SHIPMENT INFORMATION.exe

NANOCORE RAT ARTIFACTS FROM THE INFECTED WINDOWS HOST:

• SHA256 hash:  df0a89272b7d3879219cb69496c1c38e9827b679f7f4b881587665fd2e847c0e
  File size:  1,968,344 bytes
  File location:  C:\Users\[username]\AppData\Local\Temp\subfolder\filename.exe

• SHA256 hash:  [various hashes, depending on victim's Windows account name]
  File size:  approximately 1 kB
  
• File location:  C:\Users\[username]\AppData\Local\Temp\subfolder\filename.vbs

WINDOWS REGISTRY ENTRY FOR PERSISTENCE:

• Registry Key:  HKCU\Software\Microsoft\Windows\CurrentVersion\Run
• Value name:  Registry Key Name
• Value Type:  REG_SZ
• Value Data:  C:\Users\[username]\Local\Temp\subfolder\filename.vbs

 

IMAGES

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

 

Shown above:  Registry key and associated files on the infected Windows host.

 

FINAL NOTES

Once again, here are the associated files:

• Zip archive of the pcap:  2018-01-12-NanoCore-RAT-traffic.pcap.zip   379 kB (378,983 bytes)
• Zip archive of the email and malware:  2018-01-12-NanoCore-RAT-email-malware-and-artifacts.zip   2.0 MB (1,956,304 bytes)

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

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