FestIn - S3 Bucket Weakness Discovery
FestINthe powered S3 bucket finder and content discover
FestInis a tool for discovering open S3 Buckets starting from a domains.
It perform a lot of test and collects information from:
There's a lot of S3 tools for enumeration and discover S3 bucket. Some of them are great but anyone have a complete list of features that
Main features that does
Python 3.8 of above needed!
$ pip install festin $ festin -h
$ docker run --rm -it cr0hn/festin -h
$ festin -h usage: __main__.py [-h] [--version] [-f FILE_DOMAINS] [-w] [-c CONCURRENCY] [--no-links] [-T HTTP_TIMEOUT] [-M HTTP_MAX_RECURSION] [-dr DOMAIN_REGEX] [-rr RESULT_FILE] [-rd DISCOVERED_DOMAINS] [-ra RAW_DISCOVERED_DOMAINS] [--tor] [--debug] [--no-print] [-q] [--index] [--index-server INDEX_SERVER] [-dn] [-ds DNS_RESOLVER] [domains [domains ...]]
Festin - the powered S3 bucket finder and content discover
positional arguments: domains
optional arguments: -h, --help show this help message and exit --version show version -f FILE_DOMAINS, --file-domains FILE_DOMAINS file with domains -w, --watch watch for new domains in file domains '-f' option -c CONCURRENCY, --concurrency CONCURRENCY max concurrency
HTTP Probes: --no-links extract web site links -T HTTP_TIMEOUT, --http-timeout HTTP_TIMEOUT set timeout for http connections -M HTTP_MAX_RECURSION, --http-max-recursion HTTP_MAX_RECURSION maximum recursison when follow links -dr DOMAIN_REGEX, --domain-regex DOMAIN_REGEX only follow domains that matches this regex
Results: -rr RESULT_FILE, --result-file RESULT_FILE results file -rd DISCOVERED_DOMAINS, --discovered-domains DISCOVERED_DOMAINS file name for storing new discovered after apply filters -ra RAW_DISCOVERED_DOMAINS, --raw-discovered-domains RAW_DISCOVERED_DOMAINS file name for storing any domain without filters
Connectivity: --tor Use Tor as proxy
Display options: --debug enable debug mode --no-print doesn't print results in screen -q, --quiet Use quiet mode
Redis Search: --index Download and index documents into Redis --index-server INDEX_SERVER Redis Search ServerDefault: redis://localhost:6379
DNS options: -dn, --no-dnsdiscover not follow dns cnames -ds DNS_RESOLVER, --dns-resolver DNS_RESOLVER comma separated custom domain name servers
FestInaccepts a start domain as command line parameter:
> festin mydomain.com
But you also cat setup an external file with a list of domains:
> cat domains.txt domain1.com domain2.com domain3.com > festin -f domains.txt
FestInperforms a lot of test for a domain. Each test was made concurrently. By default concurrency is set to 5. If you want to increase the number of concurrency tests you must set the option
> festin -c 10 mydomain.com
Be carefull with the number of concurrency test or "alarms" could raises in some web sites.
FestInembed a small crawler to discover links to S3 buckets. Crawler accepts these options:
--http-timeout): configure a timeout for HTTP connections. If website of the domain you want to analyze is slow, we recommend to increase this value. By default timeout is 5 seconds.
--http-max-recursion): this value setup a limit for crawling recursion. Otherwise
FestInwill scan all internet. By default this value is 3. It means that only will follow: domain1.com -> [link] -> domain2.com -> [link] -> domain3.com -> [link] -> Maximum recursion reached. Stop
--domain-regex): set this option to limit crawler to these domains that matches with this regex.
> echo "cdn" > blacklist.txt > echo "photos" >> blacklist.txt > festin -T 20 -M 8 -B blacklist.txt -dr .mydomain. mydomain.com
BE CAREFUL: -dr (or --domain-regex) only accept valid POSIX regex.
mydomain.com -> is not a valida POSIX regex .mydomain.com. -> is a valida POSIX regex
FestInruns it discover a lot of useful information. Not only about S3 buckets, also for other probes we could do. For example:
After we use
FestInwe can use discovered information (domains, links, resources, other buckets...) as input of other tools, like nmap.
For above reason
FestInhas 3 different modes to store discovered information and we can combine them:
FestInresult file (
--result-file): this file contains one JSON per line with buckets found by them. Each JSON includes: origin domain, bucket name and the list of objects for the bucket.
--discovered-domains): this file contains one domain per line. These domains are discovered by the crawler, dns or S3 probes but only are stored these domains that matches with user and internal filters.
--raw-discovered-domains): this file contains all domains, one per line, discovered by
FestInwithout any filter. This option is useful for post-processing and analyzing.
> festin -rr festin.results -rd discovered-domains.txt -ra raw-domains.txt mydomain.txt
And, chaining with Nmap:
> festin -rd domains.txt && nmap -Pn -A -iL domains.txt -oN nmap-domains.txt
FestInembeds the option
--tor. By using this parameter you need local Tor proxy running at port 9050 at 127.0.0.1.
> tor & > festin --tor mydomain.com
Some tests made by
FestIninvolves DNS. It support these options:
--dns-resolver): setup custom DNS server. If you plan to perform a lot of tests you should use a different DNS server like you use to your browser.
> festin -ds 126.96.36.199 mydomain.com
FestInnot only can discover open S3 buckets. It also can download all content and store them in a Full Text Search Engine. This means that you can perform Full Text Queries to the content of the bucket!
FestInuses as Full Text Engine the Open Source project Redis Search.
This feature has two options:
--index): to enable the indexing to the search engine you must setup this flag.
--index-server): you only need to setup this option if your server is running in a different IP/Port that: localhost:6379.
> docker run --rm -p 6700:6379 redislabs/redisearch:latest -d > festin --index --index-server redis://127.0.0.1:6700 mydomain.com
Pay attention to option `--index-server` is must has the prefix **redis://**
Some times we don't want to stop
FestInand launch them some times when we have a new domain to inspect or any external tool discovered new domains we want to check.
FestInsupports watching mode. This means that
FestInwill start and listen for new domains. The way to "send" new domains to
FestInis by domains file. It monitor this file for changes.
This feature is useful to combine
FestInwith other tools, like dnsrecon
> festin --watch -f domains.txt
In a different terminal we can write:
> echo "my-second-domain.com" >> domains.txt > echo "another-domain.com" >> domains.txt
Each new domain added to domains.txt will wakeup
The domain chosen for this example is target.com.
> dnsrecon -d target.com -t crt -c target.com.csv
With this command we are going to find out other domains related to target.com. This will help to maximize our chances of success.
> tail -n +2 target.com.csv | sort -u | cut -d "," -f 2 >> target.com.domains
With this command we generate a file with one domain per line. This is the input that
> festin -f target.com.domains -c 5 -rr target.com.result.json --tor -ds 188.8.131.52 >target.com.stdout 2>target.com.stderr
In this example the resulting files are:
In order to easy the processing of multiple domains, we provide a simple script examples/loop.sh that automatize this.
Using FestIn with DnsRecon results
Run against target.com with default options and leaving result to target.com.result file:
> festin target.com -rr target.com.result.json
> festin target.com -c 5 -rr target.com.result.json --tor -ds 184.108.40.206
Q: AWS bans my IP A:
When you perform a lot of test against AWS S3, AWS includes your IP in a black list. Then each time you want to access to any S3 bucket with
FestInof with your browser will be blocked.
We recommend to setup a proxy when you use
They analyze and assess your company risk exposure in real time. Website
This project is distributed under BSD license