Real-World SS7 Bank Account Draining & SMS OTP Interception
Cybercriminals abused SS7 roaming interfaces to intercept bank-issued SMS one-time passcodes (OTPs), draining accounts of customers at O2 Germany and Metro Bank UK.
01Video Presentation & Conference Keynote
02Deep-Dive Technical Analysis
Attackers infected banking victims' desktop computers with banking trojans to capture usernames and passwords. They then leased access to an international SS7 signaling provider to issue rogue `MAP-SRI-for-SM` and `MAP-MT-ForwardSM` messages, temporarily redirecting incoming SMS verification codes to attacker-controlled SIMs to authorize fraudulent wire transfers.
03Vulnerability & Exploit Flow
SS7 SMS redirection via rogue Global Title routing.
04Recommended Defense & Mitigation Protocol
Deploy Category 3 SS7 Home Routing SMS firewalls and migrate financial 2FA from SMS to TOTP/WebAuthn.
05Security Impact & Geopolitical Consequence
Confirmed that SS7 vulnerabilities were weaponized for mass consumer financial theft, prompting banks and regulatory bodies worldwide to phase out SMS-based two-factor authentication in favor of app authenticators and FIDO hardware keys.
06Authoritative Standards & External References
07Related Topic Cluster Records
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