Data Nexus

Security

Fraud carried out through a real or convincingly forged company mailbox, usually to redirect a payment — and by value, the most damaging attack a normal business faces.

Also called BEC · Invoice fraud

01/What it means

The pattern is consistent. Access is obtained or a lookalike domain registered, correspondence is read quietly for weeks, and at the moment a genuine invoice is due, a message arrives from the expected person with the expected history and new bank details. Nothing about it looks like an attack, because almost all of it is authentic.

Technical controls reduce the odds; a process defeats it. Any change of payment details is verified by a call to a number already on file — never a number from the message — and the rule holds regardless of who appears to be asking or how urgently.

02/What people get wrong

The reply arrives inside a real conversation, quoting real history, from an address off by one character. Familiarity is precisely what the attack manufactures. Verify out of band, every time, with no exception for seniority or urgency.

Next

The definitions are the easy part. Whether the figure on your dashboard was computed this way is a different question, and usually the more expensive one.