dnsteal is a DNS exfiltration tool, essentially a fake DNS server that allows you to stealthily extract files from a victim machine through DNS requests.
dnsteal is coded in Python and is available on Github.
Features
dnsteal currently has:
- Support for multiple files
- Gzip compression supported
- Supports the customisation of subdomains
- Customise bytes per subdomain and the length of filename
Usage
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# cd dnsteal/
# ./dnsteal.py -h
___ _ _ ___ _ _
| \| \| / __| |_ ___ __ _| |
| |) | .` \__ \ _/ -_) _` | |
|___/|_|\_|___/\__\___\__,_|_|v2.0
-- https://github.com/m57/dnsteal.git --
Stealthy file extraction via DNS requests
Usage: python ./dnsteal.py [listen_address] [options]
Options:
-z Unzip incoming files.
-v Verbose output.
-h This help menu
Advanced:
-b Bytes to send per subdomain (default = 57, max=63)
-s Number of data subdomains per request (default = 4, ie. $data.$data.$data.$data.$filename)
-f Length reserved for filename per request (default = 17)
$ python ./dnsteal.py -z 127.0.0.1
-------- Do not change the parameters unless you understand! --------
The query length cannot exceed 253 bytes. This is including the filename.
The subdomains lengths cannot exceed 63 bytes.
Advanced:
./dnsteal.py 127.0.0.1 -z -s 4 -b 57 -f 17 4 subdomains, 57 bytes => (57 * 4 = 232 bytes) + (4 * '.' = 236). Filename => 17 byte(s)
./dnsteal.py 127.0.0.1 -z -s 4 -b 55 -f 29 4 subdomains, 55 bytes => (55 * 4 = 220 bytes) + (4 * '.' = 224). Filename => 29 byte(s)
./dnsteal.py 127.0.0.1 -z -s 4 -b 63 -f 1 4 subdomains, 63 bytes => (62 * 4 = 248 bytes) + (4 * '.' = 252). Filename => 1 byte(s)
#
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You can download dnsteal here:
