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Is threat modeling useful outside of application development? Is it a useful tool for doing operational assessments of information systems already in existence?

I am confused how threat modeling methodologies like STRIDE correlate with risk assessment techniques such as defined in NIST 800-30.

Pretty much all if have read about threat modeling is in the context of software development.

Thanks!

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Social engineering is something operational security needs to address. The model still applies, for example, spoofing identities can by done by finding a companies protocols, then impersonating a forgetful, new, or overworked coworker, just "trying to do your job", over the phone etc.

  • Thanks! As a follow up question, how does threat modeling differ from risk assessment? When comparing the high level approach to each they seem very similar e.g., identify threats, vulnerabilities, and rate the likelihood and impact. – m3ta Nov 23 '13 at 16:23
  • Risk assessment seems to be more concerned with the possibility and impact of a vulnerability, whereas threat modeling has more to do with the means in which a vulnerability is accomplished. – tuson Nov 25 '13 at 10:47
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Just saw this now, but I gave a conference talk recently on this: Black Box Threat Modeling (and link there to slidedeck).

Threat modeling is not a new concept (even though it is nowhere near as well-adopted as it should be...). However this has traditionally been used chiefly by designers and security engineers, and sometimes developers. But it is just as useful in later phases as well. The approach I will present will enable pentesters, ethical hackers, and bounty hunters to improve their process, work more efficiently, and return better, more significant results.

...

However, this excellent approach is rarely used in downstream activities, often being ignored completely in the testing phase. That's a downright shame! Penetration tests are usually performed under tight constraints (especially for external 3rd party testing), or with very limited window of opportunity. These techniques are incredibly efficient at highlighting security issues of many different types, and ensuring testing coverage for a selected set of business risks.

This talk will show how to incorporate threat modeling methodologies into your pentesting activities. We will discuss how to leverage a design-phase threat model (if one exists), or alternatively how to implement ad-hoc threat modeling as part of a more effective penetration test.

And also:

While there is a bit more to making Black Box Threat Modeling (BBTM) work, the underlying idea is borrowed from my full TM methodology, Value-Driven Threat Modeling. The mantra I kept repeating:

  • Find the Value.
  • Follow the money!
  • Or, how do people die?

The point being that business context can be more important than technical details, and focusing on that makes results much more impactful.

Bottom line, sometimes there are technical vulnerabilities that we actually shouldn't bother investing too much time to fix, since they don't really have associated risk or business value. And BBTM helps focus communication on those that do.

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