OAK — OnChain Attack Knowledge

Worked example · 2023-09

JPEX Hong Kong unlicensed-exchange fraud — Hong Kong — 2023-09-13 onward

Loss
~$200M (HKD ~1.6B) across ~2,600+ formally filed victims; the largest securities-fraud enforcement action in Hong Kong history at the time of the SFC referral to the Hong Kong Police Force.
OAK Techniques observed
OAK-T11.005.001 (Fake-CEX / Pig-Butchering Platform — primary; JPEX presented as a legitimate centralised exchange but held no Hong Kong VASP licence and had no verifiable exchange backend). OAK-T11.005 (Operator-side Fake-Platform Fraud — parent class). OAK-T11 (Custody and Signing Infrastructure — the victim deposit surface; users deposited real crypto to operator-controlled wallets believing they were trading on a licensed exchange). OAK-T15 (Off-chain Entry-Vector / Pre-Positioning — secondary; the platform's brand-building surface included celebrity endorsements, MTR station advertising, and media sponsorships that created apparent legitimacy before operational collapse).
Attribution
pseudonymous (the JPEX operating entity was incorporated as a Seychelles-registered entity with no verifiable beneficial owners; Hong Kong Police Force arrested ~70+ individuals including social-media influencers and over-the-counter exchange operators who promoted the platform, but the primary operator cohort behind the platform remained pseudonymous-unattributed at the federal-action level through v0.1). The arrest cohort included Hong Kong-based KOLs (key opinion leaders) and OTC shop operators who received commissions for directing retail depositors to the JPEX platform.
Key teaching point
An unlicensed exchange whose regulatory-registry check fails, whose proof-of-reserves is absent, and whose withdrawal gate activates on a per-user basis without published criteria is a fake-exchange fraud until proven otherwise. The JPEX case demonstrates the full lifecycle of a fake-CEX laundering surface: celebrity-endorsed brand building → deposit aggregation into operator-controlled wallets → escalating withdrawal gates framed as "risk management" → coordinated operational shutdown.

Summary

JPEX (Japan Exchange Wallet) operated from at least 2020 as a cryptocurrency exchange platform targeting Hong Kong, Taiwan, Macau, and mainland China retail investors. The platform claimed to be licensed as a virtual-asset service provider (VASP) under Hong Kong law and marketed itself aggressively through:

  1. Celebrity endorsement campaign — Hong Kong-based celebrities, social-media influencers (KOLs), and over-the-counter (OTC) crypto exchange operators promoted JPEX as a licensed, regulated exchange in exchange for commission on referred deposits.
  2. Public-transit advertising — JPEX purchased advertising on Hong Kong's MTR (Mass Transit Railway) stations, producing a surface of apparent institutional legitimacy.
  3. Media sponsorship — JPEX sponsored Hong Kong-based media properties and events to build brand recognition as a "legitimate" regulated exchange.

The Hong Kong Securities and Futures Commission (SFC) added JPEX to its "Suspicious Virtual Asset Trading Platforms" alert list on September 13, 2023, stating that JPEX had never applied for a Hong Kong VASP licence and was not licensed by the SFC, and that the platform's claimed licensing was false.

Within hours of the SFC warning, JPEX:

  • Blocked withdrawals from the platform or gated them behind escalating fees — first raising the withdrawal fee to 999 USDT per transaction, then requiring "risk-management verification" deposits before processing withdrawals, then halting withdrawals entirely.
  • Delisted assets and suspended trading pairs.
  • Took the platform website and app offline.

Victims who had deposited BTC, ETH, USDT, and other assets found that their displayed balances were unrecoverable — the deposit addresses pointed to operator-controlled wallets with no observable exchange-side matching-engine flow. The funds were funnelled through a mixer-and-OTC-off-ramp laundering infrastructure spanning multiple Hong Kong OTC shops.

The Hong Kong Police Force (HKPF) Commercial Crime Bureau arrested approximately 70+ individuals through September–October 2023, including KOLs and OTC shop operators who had promoted JPEX and received deposit commissions. At least HK$100M in assets (cash, luxury watches, property) were frozen or restrained. The SFC and HKPF established a joint task force for crypto-fraud investigation in response to the case; the Hong Kong Monetary Authority (HKMA) and SFC subsequently strengthened VASP licensing enforcement through 2024–2025.

Timeline

When Event OAK ref
2020–2023 JPEX operates as an unlicensed platform, accumulating depositors through KOL/celebrity promotion and public-transit advertising T11.005.001 surface created
2023-09-13 SFC adds JPEX to Suspicious Virtual Asset Trading Platforms alert list; states JPEX has never applied for a VASP licence (regulator warning)
2023-09-13 to 09-17 JPEX raises withdrawal fees to 999 USDT, then imposes escalating "risk-management" gates, then halts withdrawals entirely T11.005.001 execution
2023-09-18 to 10-31 HKPF arrests 70+ individuals including KOLs and OTC-shop operators; HK$100M+ in assets frozen/restrained (enforcement response)
2023-09 onward SFC publishes licensed VASP register; JPEX task-force model extended to broader crypto-fraud coordination between SFC and HKPF (regulatory hardening)
2023-10 to 2024 Additional victim reports accumulate; total claimed loss ~$200M; international victims in Taiwan, Macau, Singapore, and mainland China file parallel complaints (victim-cohort expansion)

What defenders observed

  • Licensing-registry cross-reference is the highest-leverage pre-deposit check. JPEX claimed to hold licences it had never applied for. Cross-referencing the platform's claimed-jurisdiction registry (the SFC's published licensed-VASP register in the JPEX case) against the platform's own licensing claims would have surfaced the discrepancy immediately.
  • Withdrawal-gate escalation is the defining T11.005.001 signal at the victim-facing layer. JPEX's withdrawal-gate escalation (raise fees → impose "verification" deposits → halt withdrawals entirely) is the canonical pattern for fake-CEX operational exit. The small-test-withdrawal-before-deposit invariant would have detected the surface at the pre-deposit stage.
  • Celebrity/KOL endorsement does not substitute for licensing-registry verification. The JPEX case is the canonical T15 (pre-positioning) adjacency for T11.005.001: the off-chain brand-building surface (MTR advertising, celebrity and KOL endorsement) was the load-bearing acquisition channel that produced victim trust. Defenders should treat celebrity/KOL endorsement as a T11.005.001 risk factor, not a legitimacy signal.
  • The Hong Kong regulatory response model is the canonical T11.005.001 regulatory-hardening pattern. The SFC's alert-list publication, the joint HKPF–SFC task force, and the post-JPEX VASP licensing enforcement strengthening through 2024–2025 constitute the most complete regulator-side response to a T11.005.001 event in the public record.

What this example tells contributors writing future Technique pages

  • T11.005.001 is the primary classification. JPEX is the largest public-record T11.005.001 fake-CEX anchor at v0.1 — a platform with no verifiable exchange backend, no regulatory licence in its claimed jurisdiction, and withdrawal gates that activate on a per-user basis without published criteria. The victim-deposit surface (T11) is the custody-side classification; the off-chain brand-building surface (T15) is the pre-positioning adjacency.
  • The JPEX case anchors the regulatory-response dimension for T11.005.001. The SFC alert list, HKPF arrests, and post-event licensing-registry hardening are the canonical regulator-side defender actions against this sub-Technique. Future contributors should map the regulator-response dimension as a first-class observable in T11.005.001 worked examples.
  • The celebrity/KOL-as-acquisition-channel surface is structurally important for T11.005 coverage. The JPEX acquisition model (KOL commission-for-deposit-referral) is structurally distinct from the romance-scam feeder narrative of the pig-butchering model and from the cold-call boiler-room model of earlier fake-exchange frauds. The sub-pattern deserves its own framing in a future v0.x update of T11.005.

Public references

  • Hong Kong Securities and Futures Commission. "SFC warns of suspicious virtual asset trading platform — JPEX." 13 September 2023. SFC Alert List entry.
  • Hong Kong Police Force. "Joint SFC-HKPF press conference on virtual asset trading platform JPEX." September 2023.
  • South China Morning Post. "JPEX scandal: Hong Kong's largest securities fraud." September–October 2023.
  • Cross-reference: T11.005.001 (Fake-CEX / Pig-Butchering Platform) at techniques/T11.005.001-fake-cex-pig-butchering-platform.md.
  • Cross-reference: T11.005 (Operator-side Fake-Platform Fraud) at techniques/T11.005-operator-side-fake-platform-fraud.md.

Proposed new BibTeX entries

@misc{sfcjpex2023,
  author = {{Hong Kong Securities and Futures Commission}},
  title = {SFC warns of suspicious virtual asset trading platform — JPEX},
  year = {2023},
  month = sep,
  day = {13},
  note = {SFC Alert List; first public disclosure that JPEX had never applied for a Hong Kong VASP licence}
}

@misc{hkpfjpex2023,
  author = {{Hong Kong Police Force}},
  title = {Joint SFC-HKPF operation against unlicensed virtual asset trading platform JPEX},
  year = {2023},
  month = sep,
  note = {70+ arrests; HK$100M+ assets restrained}
}

Techniques demonstrated (4)