The $200K Drain — Live On-Chain Investigation
On May 11, 2026, @0xUnihax0r was drained for $200K+ across Ethereum, Base, and BSC. I independently traced one branch of the operation — from a fresh drain wallet through a 5-day-old operator hub, across deBridge to Base, into a 51,000+ transaction contract routing fees to an address Arkham identifies as the Sigma.win Deployer. The downstream trail ends at Kraken. All findings are independently verifiable on-chain.
Mandate
Independently trace one branch of the drainer operation behind the @0xUnihax0r $200K+ multi-chain drain (May 11, 2026), identify the operator infrastructure, and establish where stolen funds flowed.
Methodology
Custom Python tooling (wallet_investigator.py, multi_hop_tracer.py) using Etherscan API and Alchemy RPC. Forward and backward BFS tracing from the drain wallet → operator hub identification → deBridge cross-chain bridge tracing to Base → contract interaction analysis on a 51,000+ transaction cash-out contract → Arkham Intelligence label cross-referencing on the fee collector address → downstream fund flow attribution. Parallel BSC cluster verification using a public RPC to confirm operational signature match.
Findings
Drain wallet seeded by a 5-day-old operator hub using vanity address infrastructure — four wallets sharing 0x62ac prefix and ee8a suffix, statistically impossible by chance. 12 ETH bridged via deBridge to Base. Base cash-out contract (51K+ transactions) routes fees to 0xB25750FA, Arkham-labelled as Sigma.win Deployer with $39.75M in historical flows. Downstream trail terminates at Kraken Hot Wallet 2. Operation funded via FixedFloat 22 days prior. BSC cluster analysis (independent researcher @SpecterAnalyst) confirmed identical operational signature across a parallel 50+ victim, $665K+ operation.
Outcome
Operator infrastructure identified and attributed within hours of the initial drain event. Complete fund flow documented across two chains (Ethereum → Base) from victim wallet to Kraken Hot Wallet 2. ~10 ETH confirmed still on-chain at time of investigation — flagged to victim for potential recovery via Kraken compliance. Findings published publicly with full transaction evidence. Sigma.win Deployer connection established as a finding requiring platform explanation; direct platform responsibility unconfirmed.