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Who are the people in your neighborhood? Tracking 'Shady' CIDR blocks

Talkat BSides Tampa 2021 · 2021-03-26..03-27· [security, networking]
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Shows a reproducible workflow that converts cloud CIDR lists into /24s, merges them with Zeek/bro conn.log and public feeds, and flags persistent external connections. Uses pandas and Jupyter notebooks plus Shodan and AlienVault data. Finds cobalt strike hosts clustering in a few /16s (119.5.x.x), notes 154 systems on port 10000 versus 6 fingerprinted C2s, matches 38 AWS /24s and ~480 DigitalOcean IPs to known bad web actors, and surfaces thousands of suspect connections.

AI-written summary · about

  1. 0:00Start
  2. 18:30Digital Slumlord
  3. 26:16Aws
  4. 38:33Know Who Your Neighbors Are
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