Telecom Signaling Security (SS7 / Diameter / SIP)

One of the few practices in India testing SS7, Diameter, and SIP signalling for carriers, MVNOs, and regulated enterprises with telecom exposure. Protocol-level fuzzing, interception testing, and lawful-intercept review.

24h

Response SLA

27001

ISO Certified

Telecom Signaling Security (SS7 / Diameter / SIP)

telecomSignalingSecurity

Overview

What is Telecom Signaling Security?

The signalling protocols that route calls, SMS, and subscriber data (SS7, Diameter, SIP, GTP) were designed for trusted inter-carrier networks. Modern attackers routinely abuse them to intercept OTPs, track subscribers, and hijack sessions. Testing this layer requires protocol-specific tooling and operator-level access.

SS7 Assessment

Category 1, 2, and 3 SS7 attack testing from a controlled SCCP origination. Validates SMS Home Routing, MAP screening, and subscriber-privacy filters against real adversary techniques.

Diameter & 5G Security Testing

Diameter Edge Agent and SEPP testing across LTE and 5G SA roaming interfaces. Covers subscriber denial-of-service, location disclosure, and AVP injection scenarios.

SIP/VoIP Attack Simulation

SIP trunk and IMS core testing for registration hijack, toll fraud, INVITE flooding, and media-plane interception across enterprise voice and carrier voice-over-LTE deployments.

Capabilities

What we uncover.

Real vulnerabilities — mapped to your threat landscape, not a generic checklist.

01

Subscriber Privacy & Location Leakage

We probe your network from an external SCCP peer to measure how much subscriber data leaks through AnyTimeInterrogation, ProvideSubscriberInfo, and SendRoutingInfo queries.

Key Areas

  • ATI, PSI, SRI, SRI-SM leakage tests
  • Cell-level location disclosure
  • IMSI and MSISDN correlation
  • Home Routing bypass attempts
  • Operator-grade remediation guidance
02

OTP Interception Simulation

Controlled end-to-end simulation of the SS7-based OTP interception attacks used against banks and social platforms. Safely demonstrates real subscriber impact to your risk committee.

Key Areas

  • UpdateLocation hijack testing
  • SMS rerouting via MAP
  • Call forwarding abuse
  • Two-factor bypass demonstration
  • Bank and fintech threat briefing
03

Signalling Firewall Validation

Independent validation of your SS7 and Diameter signalling firewalls, STP screening, and DEA policies. We benchmark against GSMA FS.11, FS.19, and FS.07 categories.

Key Areas

  • GSMA FS.11 / FS.19 test coverage
  • STP and DEA ruleset review
  • Category 1/2/3 attack replay
  • False-negative and false-positive reporting
  • Vendor-agnostic findings
04

Lawful Intercept Review

Architecture and access review of lawful-intercept mediation platforms, with focus on segregation of duties, audit trails, and protection against insider abuse.

Key Areas

  • LI mediation architecture review
  • Privileged-access governance
  • Audit-trail integrity testing
  • Segregation-of-duties assessment
  • Regulator alignment (DoT, TRAI, ETSI)

Ready to scope

Is your signalling layer actually tested?

Most carriers assume their signalling firewall works. We prove it, or find the gaps first. Book a scoping call with our telecom security team.

How We Work

Our Methodology

A systematic, repeatable process — from first call to final remediation.

01

Consultation & Scoping

We collaborate closely with your team to understand your environment, define objectives, and tailor simulations to the threats most relevant to your business.

02

Threat Modeling & Risk Analysis

Our experts map attack surfaces and model realistic adversary behaviour, identifying the highest-impact risks before any testing begins.

03

Vulnerability Identification

Our red team operates like real attackers — probing your defenses, chaining exploits, and surfacing weaknesses you didn't know existed.

04

Reporting & Remediation

You receive a clear, prioritised report: executive summary for leadership, technical findings for engineers, and a remediation roadmap for both.

05

Post-Engagement Support

We stay engaged after delivery — answering questions, validating fixes, and helping your team build security muscle for the long term.

Client Testimonials

Trusted by Security Teams

Frequently Asked Questions

Do you need live access to our SS7 or Diameter network?

For realistic results, yes. We work with your interconnect team to originate controlled traffic from a test SCCP or Diameter peer, either through a dedicated test GT or a tightly scoped production window. All activity is logged and reversible.

Is this testing safe to run against a production mobile network?

When scoped correctly, yes. We use rate-limited, subscriber-consented testing with pre-agreed abort conditions. We have executed this on tier-one carrier networks without subscriber-visible impact, and we provide a written safety protocol before any packet is sent.

Can enterprises without their own carrier licence benefit from this service?

Yes. Banks, fintechs, and large enterprises often depend on SMS OTP or voice authentication delivered over carrier networks they do not control. We can test their exposure by simulating the attacks an external adversary would use and reporting on upstream carrier weaknesses.