Paper: Alternative communication channel over NTP

Posted by   Martijn Grooten on   Apr 24, 2019

The use of DNS as a covert C&C communication channel has been widely documented and is fairly prevalent in the wild. Last week, Palo Alto Networks analysed its use in the various tools of Iran's OilRig (APT34) group.

But DNS is not unique in this. As long ago as 2006, ICMP packets were being used in a trojan to exfiltrate data.

Another protocol that opens up the ability for C&C communication is NTP, the protocol used for clock synchronization.

Today, we publish a paper by researcher Nikolaos Tsapakis who looked at the possibilities of NTP packets carrying data and what can be done to detect this use of NTP.

201904-alternative-communication-channel-ntp.jpg

You can read Nikolaos' paper in both HTML and PDF format.

201904-alternative-communication-channel-ntp.jpgAlternative communication channel over NTP

Read the paper (HTML)

Download the paper (PDF)

 

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