Information Gathering Masscan

super fast scanner

Posted by d3k0y on 2017-04-11 08:42:29

Masscan-a super fast scanner can scan the entire Internet in under 6 minutes, transmitting 10 million packets per second.... goddamn!!.

masscan is an Internet-scale port scanner, useful for large scale surveys of the Internet, or of internal networks. While the default transmit rate is only 100 packets/second i believe, it can optional go as fast as 25 million packets/second, a rate sufficient to scan the Internet in 3 minutes for one port.

It produces results similar to nmap, the more famous port scanner. Internally, it operates more like scanrand, unicornscan, and ZMap, using asynchronous transmission.

The major difference is that it’s faster than these other scanners. In addition, it’s more flexible, allowing arbitrary address ranges and port ranges.

masscan uses a custom TCP/IP stack. Anything other than simple port scans will cause conflict with the local TCP/IP stack. This means you need to either use the -S option to use a separate IP address, or configure your operating system to firewall the ports that masscan uses.

Downloading and building masscan:

On Debian/Ubuntu:

$ sudo apt-get install git gcc make libpcap-dev $ git clone $ cd masscan $ make

The source consists of a lot of small files, so building goes a lot faster by using the multi-threaded build:

$ make -j Here is how you might use it:

masscan -p443 -S --rate 100000 --heartbleed This command explained: = the network you want to scan, which is all 10.x.x.x -p443 = the port(s) you want to scan, in this case, the ones assigned to SSL -S = an otherwise unused local IP address to scan from –rate 100000 = 100-packets/second, which scans the entire Class A range in a few minutes –heartbleed = the new option that reconfigures masscan to look for this vulnerability The output on the command-line will look like the following:

Discovered open port 443/tcp on Banner on port 443/tcp on [ssl] cipher:0xc014 Banner on port 443/tcp on [vuln] SSL[heartbeat] SSL[HEARTBLEED]

masscan-new To download Massscan