5g 6g Telecom Attack Advanced

Skill: 5g-6g-telecom-attack-advanced

Summary

Advanced 5G/6G telecom attacks covering 5G Core (SBA) exploitation, IMSI catcher evolution (5G Stingray), SIP/Diameter protocol attacks, Open RAN vulnerabilities, network slicing abuse, and early 6G research vectors (THz comms, AI-native air interface).

Tools: garak, PyRIT, promptfoo, custom harnesses

Domain: telecom

MITRE: TA0001-Initial Access, T1557-Adversary-in-the-Middle

Description

Advanced 5G/6G telecom attacks covering 5G Core (SBA) exploitation, IMSI catcher evolution (5G Stingray), SIP/Diameter protocol attacks, Open RAN vulnerabilities, network slicing abuse, and early 6G research vectors (THz comms, AI-native air interface).

This skill covers the offensive side of telecom-advanced security, including reconnaissance, vulnerability discovery, exploitation, persistence, and reporting. Aligned with OWASP Top 10, MITRE ATT&CK, and industry-specific compliance frameworks.

Use Cases

1. 5G Core (SBA) exploitation: Abuse NF (Network Function) APIs for unauthorized access.
2. IMSI catcher evolution: 5G Stingray that forces fallback to 4G/3G for SUPI disclosure.
3. SIP/Diameter attacks: Signaling attacks via Diameter/SIP protocols.
4. Open RAN vulnerabilities: Exploit O-RAN fronthaul splits for RAN compromise.
5. Network slicing abuse: Escape network slice isolation.
6. 6G research: Early attack research on THz communications, AI-native air interface.

Core Tools

| srsRAN | Open-source 5G RAN + Core | srsran-enb / srsran-gnb | | Open5GS | Open-source 5G Core | open5gs-pgwd | | sipp | SIP/Diameter testing | sipp -sf scenario.xml | | WireShark | Protocol analysis | Decode 5G protocols | | Py Crate | Protocol testing | pycrate_diameter.py | | Scapy | Custom protocol crafting | send(IP()/UDP()/Diameter()) | | HackRF | SDR for radio attacks | hackrf_transfer |

Methodology

Attack Chain

[1] Reconnaissance         [2] Signaling Attack      [3] Core Exploitation
  - PLMN identification      - Diameter relay            - NF API abuse
  - UE attachment              - SIP REGISTER flood         - Cross-slice access
  - NF discovery              - SMS interception             - AUSF bypass
  - Slice mapping               |                            |
        |                        v                            v
        v             [2.5] Radio Attack       [4] Persistence
[1.5] IMSI catcher      - 5G Stingray             - Rogue NF
  - Force fallback        - IMSI disclosure          - Persistent slice
  - SUCI bypass           - TMSI tracking              |
  - SUPI extraction         |                          v
                            v            [5] Reporting
                          [4] Persistence   - Signaling audit
                          - Rogue base      - Slice compromise
                          - Persistent radio - Regulatory impact

Defense Perspective

Practical Steps

See payloads.md for detailed payloads and test-cases.md for the complete test checklist.

1. Reconnaissance

Identify target infrastructure; fingerprint products; enumerate attack surface.

2. Vulnerability Discovery

Run automated scanners (garak, PyRIT); manual testing per OWASP Top 10.

3. Exploitation

Chain vulnerabilities for maximum impact; document PoC.

4. Persistence

Establish persistence via configuration changes, scheduled tasks, or backdoors.

5. Reporting

Map findings to MITRE ATT&CK, OWASP, regulatory frameworks; include concrete remediation.

Detection Methods

5G Core (SBA) Detection

• SBI anomaly detection: Northbound API requests from unexpected Network Functions (NF); abnormal requester-respondent patterns.
• Diameter/SIP signaling storms: Signaling rate exceeding baseline.
• AUSF/UDM anomaly: Authentication vector requests for inactive IMSIs.

Radio Access Network (RAN) Indicators

• IMSI Catcher signatures: Tracking Area Update (TAU) storms; cells with same PLMN but unusual TAC.
• Rogue gNodeB: Cell ID not in operator database; tracking area code mismatch.

SIEM / Probe Detection

• 5G probe: Active probes for traffic analysis; detect signaling storms.
• Splunk SPL (telecom probe): index=5g sourcetype=diameter | stats count by calling_party | where count > 1000

Defense Evasion Techniques

IMSSI Catcher Stealth

• 5G Stingray improvements: 5G uses SUPI (concealed via SUCI); attackers force fallback to 4G/3G.
• Downlink-only operation: Receive-only IMSSI catchers don't page subscribers; harder to detect.
• Burst operation: Operate for short windows (<30 seconds) to avoid drive-by detection.

Signaling Attack Stealth

• Slow & low: Pace attacks below signaling firewall threshold.
• Distributed source: Spread attacks across multiple signaling partners.
• Use compromised roaming partners: Route through legitimate roaming STPs.

Common Pitfalls

• Testing in unauthorized environments
• Ignoring rate limiting (will get blocked)
• Single-shot testing (real attacks are sustained)
• Neglecting supply chain
• Forgetting monitoring/alerting

Reporting and Documentation

Reports should include CVSS scores, MITRE ATT&CK mapping, concrete PoC, business impact, and specific remediation.

Legal and Ethical Considerations

Ensure proper authorization before testing. Document scope in engagement letter. Some attack techniques may violate local laws (e.g., radio transmission without license).

Hacker Laws

Learning Resources

Skill supplementary files: payloads.md, test-cases.md

External Resources:

• OWASP Top 10
• MITRE ATT&CK
• Industry-specific compliance frameworks