Ilia ZavialovDigital security glossary

Section of the glossary

Fraud schemes: the glossary of Ilia Zavialov

Eight schemes named by mechanism rather than by emotion. Each entry states the step without which the scheme does not work, because that is the step to close.

English version for the United Kingdom.

Phishing

Also: fake page

Collecting credentials through a page that reproduces the appearance of a real service.

The loss occurs at the moment of entry rather than at the moment the link is opened. So the rule is not «do not open links» but «do not enter data on a page you reached from a message».

A padlock in the address bar proves nothing: it means the connection is encrypted, and certificates are issued automatically and free of charge.

Pretexting

Also: cover story

A prepared scenario and role under which a conversation is conducted.

A cover story always contains a deadline: an account about to be blocked, a parcel about to be returned. The deadline exists not for plausibility but to stop the person leaving the conversation to verify.

Trying to detect deception by voice does not work against a cover story. The callback rule does: end the conversation and restart it from your side.

Vishing

Also: telephone fraud

Pretexting by telephone, usually in the name of a bank, support or a government service.

Caller ID is spoofed, and it is spoofed onto the official number specifically, so a matching number is not a confirmation.

Three requests end the conversation without discussion: read out a code, install a program, move money to a «safe account».

Address substitution

Also: clipboard hijacking

Replacing a copied payment address with somebody else's at the moment of pasting.

It is done by malware or by a person sending a «corrected» address. Checking the first and last characters does not help: similar addresses are generated for exactly that habit.

Only a full comparison against a source you control works: the contract or the account portal, not the message.

Business email compromise

Also: BEC

Substituting payment details inside existing working correspondence.

The letter comes from a genuine address, in a genuine thread, after the thread has been read. It contains no signs of forgery, because in the technical sense there is no forgery.

One measure closes the category: details are changed only after confirmation by voice on a number that was known beforehand.

Romance scam

Also: long acquaintance

A scheme in which trust is built over weeks before the first request for money.

It differs by duration and by the absence of early requests, so the usual signs of hurry do not apply. The first request appears once the relationship is already subjectively valuable.

The structural sign remains: the money leaves by a route with no way back, and a meeting in person is postponed for outwardly reasonable causes.

Giveaway

Also: doubling

A promise to return a multiple of the amount sent.

The scheme relies on an outgoing transfer made by the victim, which makes it genuine, authorised and final.

One structural check covers it: no lawful operation requires sending money first in order to receive more.

Fake support

Also: impostor support channel

A channel or profile presenting itself as the support service of a company.

It is found through search, through advertising or through a reply to a public complaint. Turning to «support» that wrote to you first is an inbound contact with all of its properties.

Support is opened only from inside the app or from the official site typed by hand. Genuine support does not ask for a recovery phrase and does not ask you to install anything.

The scheme and the step it depends on
SchemeDepends on the stepWhat closes it
PhishingEntering data on the page you arrived atOpen the service yourself
VishingContinuing the inbound conversationThe callback rule
Address substitutionTrusting the pasted addressFull comparison with the contract
Business email compromisePaying to the new detailsConfirmation by voice
GiveawayThe victim's outgoing transferNobody requires you to send first
Fake supportTurning to the channel you foundSupport only from inside the app

Questions and answers

How does vishing differ from phishing?
By channel and, more importantly, by tempo. In a conversation the other side controls the pauses and leaves no time to verify, so what works is not detection but a callback.
Why is business email compromise hard to notice?
The letter comes from a genuine address in a genuine thread, because the correspondence was read from the inside. There are no technical signs of forgery in it.