zmap
masscan_as_a_service
| zmap | masscan_as_a_service | |
|---|---|---|
| 2 | 3 | |
| 5,718 | 26 | |
| 1.7% | - | |
| 8.1 | 0.0 | |
| about 15 hours ago | 2 months ago | |
| C | Python | |
| Apache License 2.0 | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
zmap
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What You Get After Running an SSH Honeypot for 30 Days
A lot of these seem to use zmap (https://github.com/zmap/zmap) or massscan (https://github.com/robertdavidgraham/masscan) for the initial scan.
Often with default parameters such as zmap setting ip id to 54321, having tcp initial window at 65535, having no SACK bit set and masscan with no SACK bit either, tcp initial window at 1024, tcp maximum segment size 1460 (which is strange to put below initial window size!), (older versions having fixed src port 61000 or 60000 from documentation examples and no MSS set), all of which are extremly uncommon in legitimate traffic and thus easily identified.
Even those so called "legitimate" scanners (emphasis on the "") seem to use these tools with little or no extra configuration.
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Masscan: Scan the entire Internet in under 5 minutes
If masscan is of interest to you, be sure to check out zmap [0] as well. It can scan the entire IPv4 address space in around 45 minutes.
0: https://github.com/zmap/zmap
masscan_as_a_service
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Git scraping: track changes over time by scraping to a Git repository
I use this approach for monitoring open ports in our infrastructure -- running masscan, commiting results to git repo. If there are changes, open the merge request for review. During the review, one would investigate the actual server, why there was change in open ports.
https://github.com/bobek/masscan_as_a_service
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Self-Host Vulnerability Scanner
We typically use a variant of https://github.com/bobek/masscan_as_a_service
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Masscan: Scan the entire Internet in under 5 minutes
Massacan is awesome. One of the usecases is to periodically scan your own servers to see if you have not accidentally opened some new ports in firewalls.
https://github.com/bobek/masscan_as_a_service
What are some alternatives?
masscan - TCP port scanner, spews SYN packets asynchronously, scanning entire Internet in under 5 minutes.
xssmap - Intelligent XSS detection tool that uses human techniques for looking for reflected cross-site scripting (XSS) vulnerabilities
netscan - A fast TCP port scanner
zdns - Fast DNS Lookup Library and CLI Tool