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A number of sources, including DShield, have noticed an uptick on port 2323 TCP beginning around 3 weeks ago.
This is the scanner portion of the Mirai botnet scanning for IoT devices on both 23/TCP and 2323/TCP. There are a number of IoT devices that use port 2323/TCP as an alternate port for Telnet. Those who have setup listeners on port 2323 are seeing brute force credential attacks utilizing a small dictionary. The Mirai botnet iwas used to attempt to DDOS Brian Krebs website i and ifor the nearly 1 Tbps DDOS against OVH in late September
-- Rick Wanner MSISE - rwanner at isc dot sans dot edu - http://namedeplume.blogspot.com/ - Twitter:namedeplume (Protected) |
Rick 321 Posts ISC Handler Oct 7th 2016 |
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Oct 7th 2016 4 years ago |
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I was just wondering about this very thing a couple of hours ago when I was looking through my firewall logs.
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xannash 1 Posts |
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Oct 7th 2016 4 years ago |
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Yes, I have been seeing a lot of this in some various logs as well. Thanks for your post.
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xannash 1 Posts |
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Oct 14th 2016 4 years ago |
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