Worked example · 2025-08

Hypervault Finance exit scam via fake-audit-claims — Hyperliquid / Ethereum — 2025-08

Loss: approximately $3.6 million drained from over 1,100 depositors across the Hypervault auto-compounding vault platform. The platform held approximately $5.91M in total value locked (TVL) at the time of the incident per DeFiLlama. Approximately 752 ETH (~$3M) was bridged from Hyperliquid to Ethereum and routed through Tornado Cash.
OAK Techniques observed: OAK-T6.002 (Fake Audit-Claim — primary; the project claimed audits underway with Spearbit, Pashov, and Code4rena; Pashov publicly denied any knowledge of Hypervault, and Code4rena listed no pending audits for the protocol) + OAK-T6.004 (Audit-Pending Marketing Claim — the "audits underway" framing was a forward-looking pending-audit claim with no engagement artefact at any named firm; Pashov's public denial and Code4rena's zero-record confirmation are the canonical PATH_B detection signal per the T6.004 spec) + OAK-T2.001 (Single-Sided Liquidity Plant — the Hypervault auto-compounding vaults were structurally operator-controlled deposit traps from deployment; the vaults collected over $5.91M in user-deposited assets with the operator retaining unilateral withdrawal authority through the vault contracts; the "auto-compounding" branding and fake audit claims were the trust substrate that drove deposit velocity into the operator-controlled deposit surface) + OAK-T5.001 (Hard LP Drain — the operator collected user deposits into vaults they controlled, then drained the pooled funds and disappeared) + OAK-T7.001 (Mixer-Routed Hop — 752 ETH routed through Tornado Cash after bridging from Hyperliquid to Ethereum) + OAK-T6.001 (Source-Verification Mismatch — the platform presented as a legitimate, audited DeFi protocol; the claimed audit affiliations were fabricated).
Attribution: pseudonymous — the Hypervault team operated under completely unknown identities. The website, X account (@hypervaultfi), and Discord were all deleted simultaneously at the exit moment. No named individuals have been publicly linked to the operation at v0.1.
Key teaching point: Hypervault is the 2025 anchor for the fake-audit-claim-as-rug-pull-entry-vector sub-pattern. The operator did not need to exploit a smart-contract vulnerability or bypass a security control — they fabricated audit affiliations with three recognised firms, used those claims to establish depositor trust, collected deposits into operator-controlled vaults over a sustained window, then deleted all surfaces and routed the funds through Tornado Cash. The structural lesson is that any DeFi vault platform whose audit claims cannot be independently verified at the named firm's audit registry is T6.002-exposed by construction — the depositor's verification burden is one registry lookup, but the UX layer that mediates that lookup is not yet standardised across wallet and aggregator surfaces.

Summary

Hypervault Finance launched on Hyperliquid in mid-2025 as an "unmanaged" auto-compounding vault system, promising annual yields of up to 76% on stablecoins and 95% for HYPE liquidity pools. The platform marketed itself as a long-term project, sharing plans to lower yields for sustainability and to launch a native token later in the year. Developers claimed an audit was underway with well-known security firms Spearbit, Pashov, and Code4rena — a claim that was later contradicted by the named firms.

In approximately August 2025, the Hypervault team simultaneously deleted the project's website, X account (@hypervaultfi), and Discord server. Approximately $3.6 million in user-deposited funds was drained from the platform. On-chain analysis by PeckShield documented the funds being bridged from Hyperliquid to Ethereum, swapped for ETH, and approximately 752 ETH (~~$3M) routed through Tornado Cash. The remaining TVL (~~$2.3M of the pre-incident $5.91M) was also unrecoverable.

Prior to the incident, community members had raised red flags. When contacted, Pashov replied that they had never heard of Hypervault. Code4rena's website listed no pending audits for the protocol. The crypto researcher HypingBull publicly called the project's actions "shady" and withdrew funds before the platform went offline. Despite these warnings, Hypervault continued to operate normally until the final hours, encouraging users to explore other HyperEVM protocols and suggesting an imminent official audit.

The abrupt shutdown and untraceable transfers followed the classic exit-scam pattern: collect deposits into operator-controlled vaults, fabricate legitimacy signals (audit claims, roadmap, token launch plans), then delete all surfaces and route funds through a mixer. The case is structurally similar to Yfdexf.Finance (September 2020, $20M) but distinguished by the Hyperliquid/EVM cross-chain surface, the explicit fake-audit-claim vector as the primary depositor-trust mechanism, and the Tornado Cash routing tail.

The case is one of the larger exit scams of 2025 and is the cleanest 2025 anchor for the T6.002 (Fake Audit-Claim) sub-pattern, where the audit fabrication is the load-bearing trust signal that enables the deposit-collection phase.

Timeline (UTC)

When	Event	OAK ref
Mid-2025	Hypervault Finance launches on Hyperliquid as auto-compounding vault platform; claims Spearbit, Pashov, and Code4rena audits underway; ~$5.91M TVL accumulated across >1,100 depositors	T6.002 (fake-audit-claims as trust substrate)
Pre-August 2025	Community members contact named audit firms; Pashov denies knowledge; Code4rena shows no pending audit; HypingBull publicly flags project as "shady"	T6.002 (audit-firm denial — canonical detection signal)
2025-08 (approximate)	Team simultaneously deletes website, X account, Discord; ~$3.6M drained from vaults	T5.001 execution (Hard LP Drain)
2025-08 (post-exit)	Funds bridged Hyperliquid → Ethereum, swapped for ETH; ~752 ETH routed through Tornado Cash	T7.001 (Mixer-Routed Hop)
2025-08 onward	PeckShield publishes on-chain analysis; no operator attribution established	(attribution gap)

What defenders observed

Pre-event (audit-firm verification gap): The project claimed audits by three named firms. When community members independently contacted the firms, Pashov denied any engagement and Code4rena showed no record. The verification was trivial — one message to each firm — but no standardised UX existed to surface this denial at the depositor-decision layer before funds were committed.
Pre-event (yield-too-good signal): The claimed 76% stablecoin and 95% HYPE LP yields were structurally unsustainable — a standalone risk signal independent of the audit-claim verification. The combination of unsustainable yields plus unverifiable audit claims plus anonymous team was the pre-event defender signal.
At-event (surface deletion): The simultaneous deletion of all operator surfaces (website, X, Discord) was the T6.001 signal — the surfaces were deception infrastructure, not genuine community infrastructure. The simultaneity confirmed coordinated operator action.
At-event (drain transaction): The on-chain drain moved funds from Hypervault vaults to attacker-controlled addresses. PeckShield documented the bridge path (Hyperliquid → Ethereum) and the Tornado Cash deposit of ~752 ETH.
Post-event (mixer routing): The Tornado Cash deposits created the standard T7.001 detection surface — mixer-deposit events linked to the drain addresses, with the mixer's anonymity-set property limiting further tracing.

What this example tells contributors writing future Technique pages

Fake-audit-claim verification is a pre-deposit UX-layer problem. The Pashov denial was available before the exit — a single message to the named firm surfaced the fabrication. The gap is that no wallet, aggregator, or venue systematically performs audit-claim verification at the listing / deposit-decision layer and surfaces the result before the user commits funds. Future T6.002 detection guidance should focus on the verification-infrastructure gap (audit-firm registry APIs, per-firm denial feeds, wallet-side surfacing) rather than on re-deriving the detection signal.
The yield-too-good + unverifiable-audit + anonymous-team triplet is the pre-event defender signal. Any DeFi vault platform that simultaneously claims (a) unsustainably high yields, (b) audits by named firms without verifiable registry entries, and (c) anonymous team with no track record is T6.002 + T5.001 exposed by construction. Future T6.002 contributor guidance should flag the triplet as a standing risk factor.
Hypervault is structurally a T6.002 variant of the Yfdexf.Finance (2020) short-window exit scam pattern. Both cases share the deposit-collection → surface-deletion → disappear pattern. Hypervault adds the fake-audit-claim layer as the primary trust substrate and the Tornado Cash routing as the laundering tail. Future T5.001 examples covering operator-side exit scams should distinguish the fake-audit-claim-amplified sub-pattern from the social-media-blitz sub-pattern (Yfdexf).

Public references

[coinspeakerhypervault2025] — Coinspeaker, "Hypervault Vanishes With $3.6M — DeFi Rug Pull Exposed" (2025-08).
[peckshieldhypervault2025] — PeckShield, X thread on Hypervault drain and Tornado Cash routing (2025-08).
[mexchypervault2025] — MEXC, "Hypervault Finance Loses $3.6 Million in Suspected Rug Pull" (2025-08).

Citations

[coinspeakerhypervault2025] — primary contemporaneous press; $3.6M figure, fake-audit-claim mechanism, Pashov/Code4rena denial, HypingBull pre-event warning, Tornado Cash routing.
[peckshieldhypervault2025] — on-chain analysis; bridge path Hyperliquid → Ethereum, 752 ETH Tornado Cash deposit.

Discussion

Hypervault Finance is the 2025 canonical anchor for the fake-audit-claim-as-rug-pull-entry-vector sub-pattern of T6.002. The case demonstrates the recurring structural property that DeFi vault platforms whose audit claims cannot be independently verified at the named firm's audit registry are T6.002-exposed by construction — the verification burden is one registry lookup, but the UX layer that mediates that lookup at the depositor-decision point is not yet standardised.

The case is structurally significant for OAK because it provides a clean 2025 worked example where T6.002 (Fake Audit-Claim) is the load-bearing trust signal rather than a secondary modifier. In prior T6.002 cases, the fake audit claim was typically an amplifier on an already-suspicious token launch (T1/T2 adversarial properties were already detectable). In Hypervault's case, the fake audit claims WERE the primary depositor-trust mechanism — depositors entered a yield-farming vault specifically because they believed it was audited by named firms. The T6.002 surface was therefore the primary entry-vector for depositor funds, not a secondary amplifier.

The attribution surface is the case's principal limitation at v0.1. The operator team is completely unknown — no named individuals, no funder-graph cluster identification, no exchange-KYC linkage. The Tornado Cash routing further limits attribution. The case sits in the pseudonymous-attribution category alongside Yfdexf.Finance and other anonymous-operator exit scams.

For defenders, the case reinforces the standing lesson that audit-claim verification must be performed against the audit firm's own registry, not against the project's marketing. The named-audit-firm denial is the highest-precision T6.002 detection signal — it is binary, immediately actionable, and requires only an API call or a manual lookup against the firm's public audit registry. The gap is UX-layer standardisation, not detection-methodology maturity.