Break the Kill Chain at the Cheapest Link
Apply kill chain thinking to select controls that interrupt attack progression before impact.
Phishing campaign Invoice lure delivered, one click happened, payload downloaded, outbound callback blocked. The team must decide whether to invest in mail filtering, endpoint rebuilds, egress control, or late-stage exfiltration checks. Kill chain thinking Find the earliest reliable break Attackers need progression. Defenders get leverage by interrupting a repeated step before it reaches impact. worst outcome Only thinking about exfiltration starts too late. Controls reinforce the stage where the campaign actually failed. Choose controls by where they interrupt progression, not by which stage sounds most dramatic. 01 Evidence 02 Invest 03 Try Read the chain The callback was blocked by…
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