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What is an SMS Botnet?
An SMS botnet is a network of compromised mobile devices controlled remotely to execute SMS-based attacks. The 2024 variants demonstrate alarming advancements:
Key Characteristics
- Carrier-grade persistence (survives factory resets)
- Zero-click infection (requires no user interaction)
- Dynamic C2 infrastructure (uses Telegram/SMS for commands)
- Multi-vector monetization (premium SMS fraud, credential theft)
Technical Features of SMS Botnet 2024
1. Advanced Infection Methods
- Exploiting RCS vulnerabilities
- MMS-based payload delivery
- SIM-jacking integration
- Fake carrier updates
2. Botnet Control Mechanisms
- Decentralized C2 channels
- AI-driven targeting
3. Attack Capabilities
- Large-scale smishing campaigns
- Bank credential phishing (posing as institutions)
- 2FA interception (fake “verification code” requests)
- Premium SMS fraud
- Silent subscription to paid services
- $3-10 per message fraud (scales to millions)
- Location-based spam
- Geo-fenced malicious messages near banks/retailers
4. Stealth and Evasion
- Baseband-level operation
- Dynamic IMSI switching
- EPDG tunneling
- Self-destruct mechanisms