SIM swap attacks enable fraudsters to hijack a victim’s mobile phone number, intercept one-time codes, reset exchange and wallet passwords, and initiate unauthorized crypto transfers. In 2025 SIM swapping remains a leading cause of high-value crypto thefts. Recoverly Ltd’s proven recovery framework—spanning incident intake, telecom forensics, on-chain tracing, exchange and carrier engagement, and legal enforcement—has recovered up to 95 percent of stolen assets when engaged immediately. This guide covers each phase in detail, real-world case studies, prevention best practices, and how to begin your recovery.

1 How SIM Swap Attacks Lead to Crypto Loss

1.1 Mobile Number Porting
Attackers trick or bribe mobile carrier staff into transferring the victim’s phone number to a new SIM under attacker control.

1.2 One-Time-Code Interception
Once the phone number is ported attackers intercept SMS-based two factor authentication codes and transaction confirmation texts.

1.3 Account Takeover
Using intercepted codes they reset email and exchange account passwords, disable email alerts, and gain full access to trading and withdrawal functions.

1.4 Immediate Asset Drain
With control of authentication they transfer cryptocurrencies from exchange wallets and third party custodians to attacker addresses, often batching multiple transfers into mixers.

2 Why Quick Professional Action Is Vital

• Narrow Window for Mobile Reversal
  Once the swap is detected, reversion by the carrier can take hours, during which attackers complete transactions.

• Irreversible Blockchain Transactions
  Unauthorized transfers finalize on-chain immediately; only custodial cooperation can freeze or reverse withdrawals.

• Evidence Volatility
  Carrier call logs and porting requests vanish swiftly; prompt preservation is essential for legal and regulatory processes.

3 Recoverly Ltd’s Five Phase Recovery Framework

Phase 1 Incident Intake and Telecom Forensics

• Rapid Onboarding
  Contact Recoverly Ltd twenty-four seven via https //recoverlyltd.com/contact, +44 744 192 1933 or [email protected].

• Carrier Case Reference
  Immediately file a port-out dispute with the mobile operator and obtain a case reference number.

• Forensic Call Log Preservation
  Request unfiltered call records, port-out request details, SIM swap audit trails from the carrier under data preservation order.

Phase 2 Secure Remaining Assets and Evidence Capture

• Wallet Hardening
  Transfer any remaining funds from at-risk wallets to a new wallet using hardware or multisignature controls.

• Transaction Record Archiving
  Preserve email alerts, SMS notifications, account activity logs and any phishing or social engineering messages used.

Phase 3 Advanced On-Chain Tracing

• Initial Theft Tagging
  Identify unauthorized withdrawal transaction hashes, block heights, token amounts, and destination addresses.

• Peel-Chain Analysis
  Use proprietary clustering algorithms to trace stolen funds through mixers, decentralized exchanges and cross chain bridges.

• Exchange Deposit Attribution
  Match exit addresses to exchange deposit wallets via our maintained repository for targeted freeze requests.

Phase 4 Exchange and Carrier Engagement

• Exchange Freeze Requests
  Submit a detailed forensic dossier to each implicated exchange under AML and KYC regulations requesting immediate holds on stolen funds.

• Carrier Collaboration
  Work with telecom regulators and compliance teams to suspend the attacker SIM, restore the victim’s number, and provide port-out evidence to law enforcement.

Phase 5 Legal Enforcement and Asset Repatriation

• Preservation Notices
  Serve legal notices on mobile carriers, hosting providers of attacker infrastructure, mixers and exchanges to preserve logs and prevent fund movement.

• Emergency Injunctions
  File ex parte applications in the relevant jurisdictions compelling exchanges and custodians to freeze or return the stolen crypto.

• Mutual Legal Assistance
  Initiate MLAT requests for cross-border collaboration with telecom and law enforcement agencies to seize attacker assets and logs.

• Settlement and Recovery
  Negotiate with custodians for voluntary restitution; enforce court orders where necessary to repatriate funds to the victim’s secure wallet.

4 Case Study: Recovery of USD 500 000 in Ethereum

• Incident
  An executive’s mobile number was ported to an attacker SIM within minutes. The attacker intercepted SMS codes and withdrew 250 ETH (≈ USD 500 000) to three mixer addresses.

• Recovery Process

  1. Phase 1: Filed port dispute within one hour; obtained carrier case reference.

  2. Phase 3: Tagged withdrawal transactions and traced funds through two mixers to Exchange A.

  3. Phase 4: Exchange A froze 230 ETH; carrier provided port-out logs to law enforcement.

  4. Phase 5: Court injunction in Singapore compelled return of 225 ETH.

• Outcome
  90 percent recovery of stolen assets within 48 hours.

5 Prevention Best Practices

1 Use App Based Two Factor
Replace SMS-based codes with authenticator apps or hardware security keys.
2 SIM Swap Alerts
Activate mobile operator alerts for any port-out or SIM change requests.
3 Email Hardening
Secure email with hardware security keys and unique passwords; enable account recovery protections.
4 Dedicated Recovery Protocols
Maintain an offline emergency contact list for rapid incident reporting to exchanges and carriers.

6 Getting Started with Your Recovery

SIM swap attacks demand immediate response. Recoverly Ltd’s specialists are available around the clock to deploy our five phase recovery framework and reclaim your crypto.

Contact Recoverly Ltd
Visit https://recoverlyltd.com/contact
Call +44 744 192 1933
Email [email protected]

Our team will guide you through telecom forensics, wallet hardening, on-chain tracing, exchange and carrier collaboration, and legal actions—working tirelessly to recover your assets.