Crypto’s security problem isn’t just on-chain anymore. It’s at the front door.
Blockchain security firm CertiK published a report documenting 34 verified wrench attacks between January and April 2026, a 41% increase from the 24 incidents recorded during the same period in 2025. Total losses from these attacks exceeded $101 million in just four months.
Among the cases flagged in the report: the suspected abduction of Nancy Guthrie, the 84-year-old mother of NBC anchor Savannah Guthrie, which CertiK categorized as a potential “wrench attack by proxy.” Ransom notes demanding $6 million in Bitcoin were sent to multiple media outlets, including KGUN9 and TMZ.
What wrench attacks actually are, and why they’re escalating
The term “wrench attack” comes from a satirical XKCD comic first published in 2009. The joke is simple: why bother cracking someone’s encryption when you can threaten them with a $5 wrench until they hand over the keys?
