What happened
Compromised signer devices showed a benign transaction while the actual payload transferred pool ownership.
Transaction-level mechanics
Public post-incident disclosures do not include full transaction calldata or execution traces for this incident.
TODO: Add exact Safe transaction hash, decoded actions, and the on-chain state changes once verified primary sources are available. For now, the attack vector summary above is derived from public reporting.
What independent decoding / hash verification / config scanning would have caught
Decoding on a clean second device would reveal the ownership-transfer call. Caveat: the devices themselves were compromised, so verification had to happen off those machines.
Verdict
Could have helped partially