Offensive Security for MSPs in Australia: Protecting Yourself and Your Clients

Offensive security for MSPs Australia is a topic with two sides, and both matter. Managed service providers are trusted to run the technology that other businesses depend on, which puts them in a uniquely powerful and uniquely exposed position. An MSP holds privileged access to every client it supports, so its own security posture ripples out across dozens of organisations. At the same time, MSPs are increasingly asked by those clients to provide security testing they are not always equipped to deliver themselves.

This briefing addresses both. It explains why MSPs are such attractive targets, how to secure the tooling that makes them powerful, and how an MSP can meet growing client demand for penetration testing by working with a specialist offensive security partner. It is written for Australian MSPs that want to protect themselves and strengthen what they offer their clients.

Why MSPs Are High-Value Targets

Attackers look for leverage, and an MSP offers more of it than almost any other single business. A provider supporting fifty clients holds privileged access to fifty networks, frequently through one shared set of management tools. Breach the provider, and an attacker gains a potential path into every one of those downstream organisations at once.

This is the essence of supply-chain risk. The effort required to compromise a single MSP is repaid many times over, because the access gained cascades to every client that trusts it. It is why sophisticated attackers deliberately target service providers rather than attacking each client individually, and why an MSP's security is never only its own concern. Every client inherits the consequences of the provider's posture, for better or worse.

That reality raises the bar. An MSP cannot credibly advise clients on security while leaving its own environment untested, and the systems most in need of scrutiny are exactly the ones that make the MSP valuable.

Securing RMM and Management Tooling

Remote monitoring and management platforms are the engine of a modern MSP. RMM lets a provider administer client systems remotely, deploy software and run scripts across many endpoints at once. It is essential, and it is also one of the most dangerous assets an MSP owns, precisely because it is so privileged by design.

If an attacker compromises an RMM platform or the credentials that reach it, they can potentially push malicious changes to every managed endpoint in seconds. The same efficiency that makes the tooling valuable makes a compromise catastrophic. Protecting it well is therefore fundamental:

• Enforce strong multi-factor authentication on all management tooling and administrative accounts.
• Apply least privilege, so technicians and integrations hold only the access they genuinely need.
• Separate administrative identities from everyday accounts and email.
• Monitor and log management activity so unusual actions stand out quickly.
• Keep the tooling and its supporting infrastructure patched and hardened.

These controls look straightforward on paper, but they frequently have gaps in practice. Testing whether they hold up under a determined attempt to abuse them is far more reliable than assuming they do. A penetration testing engagement focused on an MSP's own environment examines the management tooling, administrative access and client trust relationships that an attacker would target first.

Testing the Trust Relationship

The most important thing to test in an MSP is not any single system but the trust relationship itself: the path from the provider's environment into client networks. An attacker who lands inside the MSP will look for exactly this, so the security team should look for it first.

Good testing traces how a foothold in the MSP could pivot toward clients, whether through management tooling, shared credentials, remote access, or connections that were set up for convenience and never revisited. Finding and closing those paths protects the whole client base at once. Because a compromise of the MSP can cascade so widely, this internal assurance is among the highest-value investments a provider can make. A red teaming engagement can emulate a realistic supply-chain attacker for MSPs that want to see how the full chain from initial access to client impact would actually play out.

Offering Penetration Testing to Your Clients

Alongside protecting themselves, MSPs face growing demand from clients for security testing. Clients increasingly need penetration testing to satisfy their own customers, insurers, auditors and regulatory obligations, and they naturally turn to the provider they already trust. The difficulty is that offensive security is a distinct specialism, and most MSPs do not have dedicated testers in-house.

There are three ways an MSP typically responds to this demand, and only one of them serves the client well:

• Turn the work away, which sends the client looking elsewhere and weakens the relationship.
• Attempt the testing without the right expertise, which risks delivering shallow assurance that misses real issues.
• Partner with a specialist offensive security firm to deliver genuine testing while keeping the client relationship.

The third option lets an MSP meet the need properly. The provider maintains the client relationship and coordinates the engagement, while the specialist performs the testing and reporting to a professional standard. The MSP adds a valuable service, keeps its trusted advisor role, and gives the client the real expertise the work requires, all without building an offensive security team from scratch.

How a Partner Arrangement Works

A partner arrangement can be shaped to suit how an MSP prefers to work. In a collaborative model, an experienced offensive security team delivers the testing alongside the MSP, who introduces the service and manages the client through the process. Depending on the arrangement, the MSP can present the testing as part of its own offering or bring the specialist in directly, whichever fits the client relationship best.

Either way, the outcomes are the same:

• The client receives genuine, expert testing scoped to their real risks.
• The MSP strengthens the relationship by solving a need it could not fully meet alone.
• Reporting is clear enough for the client's stakeholders and technical enough to drive real fixes.
• The MSP grows its service portfolio without carrying the cost of specialist staff.

The best structure depends on the MSP's preferences and its clients' expectations, and it is worth a short conversation to find the right fit rather than forcing a one-size model.

Getting Shared Responsibility Right

A recurring source of risk in the MSP model is confusion over who is responsible for what. When each party assumes the other is covering a task, gaps appear that neither notices until an attacker does. Clear agreement on responsibilities for patching, backups, monitoring, user access and incident response is essential, and it should be written down rather than assumed.

Independent testing supports this directly. By revealing where controls are actually failing, regardless of who was meant to own them, testing turns a vague sense of shared responsibility into a concrete list of gaps to assign and close. It is far better to discover an unowned control during a planned assessment than during a live incident, and the same clarity makes any future incident response faster and less contentious.

Strengthening the Whole Chain

For MSPs, offensive security is both a duty to themselves and an opportunity with their clients. Protecting the tooling and trust relationships that make an MSP powerful defends every organisation that depends on it, while partnering to deliver genuine testing lets an MSP meet real client demand without overreaching. Both come back to the same idea: understand where you are exposed, test it honestly, and fix what you find.

If you are an MSP looking to secure your own environment or to offer specialist penetration testing to your clients, our team of expert operators can help. Explore our penetration testing services, review our red teaming capability, or get in touch to talk through a partner arrangement. You can also call StrikeCyber on 1300 654 898.