Extracting password from Dahua firmware image

I wanted to access my Dahua IPC-HFW4300S via telnet (as there is no ssh access).
Unfortunately Dahua does not provide the root password (purposely, as it is hardcoded backdoor).
The currently documented password (vizxv) does not work.

So I got the firmware image (which is achievement, considering Dahua stance on firmware) and managed to extract hash.

First of all the firmware image needs to be extracted from zip, I’ll skip this part and jump straight into extracting binary parts from the firmware:

binwalk -e {Firware_File}

The binwalk utility should have extracted the following files:


the file of interest is romfs-x.ubifs.img as it has hits when grep-ed for ‘root’:


Now we have a hash which we can brute force with John The Ripper tool.

I settled for 1.8.0 jumbo version with CUDA support.
CUDA seems to be about 2.5 times faster on Nivida GTX560ti than a very beefy 2x Intel Xeon E5-2660 (with 20 cores total).

Particular thing to I had to do to compile (beyond wget-ing and un-tar-ing the arhive) is to modify the entry from gcc-4.6 to gcc-4.8 in Makefile, as it would throw compilation error (gcc-4.6: error trying to exec ‘cc1plus’: execvp: No such file or directory).

line 152:

CCBIN = /usr/bin/gcc-4.8

‘make’ once done that (and libssl-dev is installed), and it should compile.

to run:

./john --format=md5crypt-cuda {hash_file}

The password turns out to be ‘vizxv’ (without quotes). This is not the telnet password (possibly console password).

I was directed towards correct password here: http://www.cctvforum.com/viewtopic.php?f=19&t=44381

Here are telnet credentials
username: admin
password: 7ujMko0{webui_admin_password}

For example webUI admin password is 123456 then the telnet password is 7ujMko0123456