Did some botnet lose its C&C mechanism?

[Rich Kulawiec <rsk () gsp org>]

Multiple people report, via public and private channels, a noticeable
drop (60-80%) in bot-sourced spam attempts over the last 72 hours.
Some of my sensors have observed the same, others haven't, and still
others give mixed indications.  But there are sufficient observations
to indicate that *something* curious has happened.

---Rsk
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