Terms of Use

Historical research datasets: Paquet-Clouston, Romiti, Haslhofer and Charvat — Sextortion Spam Bitcoin (2019); Paquet-Clouston, Haslhofer and Dupont — Ransomware Payments in the Bitcoin Ecosystem (2018), both CC BY 4.0. We also use MyEtherWallet warnings (MIT), the ScamSniffer archive (GPL-3.0), and publications by Cisco Talos, FBI and DOJ; selected GraphSense representations are MIT-licensed. Addresses are validated and deduplicated. A historical match requires further review and does not by itself establish current sanctions.

Results apply to the specified address, network and time of the check. They do not establish the owner's identity or guarantee an exchange's decision. Record matches, restrictions and incident reports require context.

Address data comes from OFAC and FBI/IC3, the UK Sanctions List (Open Government Licence v3.0) and the licensed Ransomwhere 1.1.0 archive by Jack Cable, 2024, CC BY 4.0. We transform the data into an address index, normalizing address formats and identifying networks and categories. Original dates are retained. Data providers do not endorse this service.

UK Sanctions List — original source

Open Government Licence v3.0

Jack Cable — Ransomwhere 1.1.0

Creative Commons Attribution 4.0

Sextortion Spam Bitcoin — CC BY 4.0

Ransomware Payments in the Bitcoin Ecosystem — CC BY 4.0

GraphSense TagPacks — MIT

MyEtherWallet — MIT

ScamSniffer — GPL-3.0

Cisco Talos — Anatomy of a sextortion scam

By using the DefCrypt website, submitting the assessment form, or contacting us through the listed channels, you confirm that you have read and agree to these Terms.

If you do not agree, do not use the website or submit an inquiry. The services are intended for people aged 18 and over.

The website describes DefCrypt's areas of work: resolving exchange account restrictions, recovering access to wallets, blockchain analytics, legal document preparation, and emergency response.

The website materials are for informational purposes. Publishing a page does not itself create a contract for services or require us to accept your matter.

Work on a matter begins after the scope, terms, and payment, where applicable, are agreed separately, usually through a contract or written confirmation in an agreed channel.

The initial assessment helps determine whether there is a meaningful path forward, which type of work is most relevant, and what information is needed for the next step.

The assessment is not a guarantee that we will accept the matter, a fixed work plan, a legal opinion, or a promise of an outcome. We may decline without a detailed explanation if the matter is outside our expertise, is risky, or lacks sufficient information.

We do not guarantee the recovery of assets, the lifting of account restrictions, restored access, any timeline, or a specific outcome. The result depends on the exchange, the evidence, the jurisdiction, the actions of third parties, and the details of your matter.

Past cases published on the website describe individual outcomes from our work and do not promise the same result in a new matter. Before review, we do not specify the outcome or an exact timeline.

Do not send the following through the website, assessment form, or public channels:

• seed phrases or recovery phrases;
• private keys;
• wallet or exchange passwords;
• 2FA codes or secrets;
• any other data that gives direct control over assets.

The DefCrypt website and services must not be used to:

• recover or conceal unlawfully obtained assets;
• circumvent lawful exchange restrictions, court decisions, or regulatory restrictions;
• obtain information about another person's wallets or transactions without a lawful basis;
• harass, surveil, or harm third parties;
• submit information about a matter that you know is false.

Exchange unfreezing and wallet access recovery start from 10% of the amount made accessible again. Blockchain analysis with a report starts from $800. The exact percentage, price, and scope are agreed before paid work begins.

The initial assessment is free. Details of the model, eligibility criteria, and exclusions are provided on the Success Fee page. Payment terms for subsequent work and agreed third-party costs are governed by the contract.

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Reports, analytical materials, and document packages prepared for your matter are provided on the terms of the contract. Until the agreed work has been paid for in full, we may withhold the final materials.

To the extent permitted by applicable law, DefCrypt is not liable for indirect loss, lost profits, market movements, the actions of exchanges, courts, or law-enforcement authorities, or losses resulting from incomplete or inaccurate information that you provided.

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We may update these Terms. The current version is always available on this page, and the update date appears at the beginning. Continuing to use the website or requesting an assessment after a material update constitutes acceptance of the new version, unless the law requires a different procedure.

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The public-facing party to these Terms is the DefCrypt brand, using the contact channels listed on the website.

We seek to resolve disagreements through discussion in an agreed channel. The specific jurisdiction, dispute-resolution procedure, and applicable law for paid work are set out in the contract.