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Subject: Re: [cti-stix] Malware SDO Remaining Open Questions

Thanks – I agree with your comment around “exploits”, though maybe we can just update the description to state that the malware “exploits or attempts to exploit” a vulnerability to get around this.





From: <cti-stix@lists.oasis-open.org> on behalf of Sean Barnum <sean.barnum@FireEye.com>
Date: Friday, October 27, 2017 at 10:49 AM
To: Ivan Kirillov <ikirillov@mitre.org>, "cti-stix@lists.oasis-open.org" <cti-stix@lists.oasis-open.org>
Subject: Re: [cti-stix] Malware SDO Remaining Open Questions


1) definitely feel this should be flexible and not a filename.

2) exploits is clearer but I do have some minor worry that it conveys an impression that the malware always successfully exploits the vuln where reality in many cases is that malware may target a vuln for exploitation but its success may depend on many other factors within the targeted environment. Not a huge worry but something to consider.


From: cti-stix@lists.oasis-open.org <cti-stix@lists.oasis-open.org> on behalf of Kirillov, Ivan A. <ikirillov@mitre.org>
Sent: Friday, October 27, 2017 12:43:32 PM
To: cti-stix@lists.oasis-open.org
Subject: [cti-stix] Malware SDO Remaining Open Questions




As we mentioned on the TC call, there are a few small open questions remaining on the updated Malware SDO [1]:


  1. Regarding the name property, should this property always capture the filename for a malware instance? Or should we leave this flexible so that you can capture more semantic (e.g., family-derived) names such as “Zeus.A”?
  2. Regarding the existing “targets” relationship in STIX 2.0 from Malware to Vulnerability, we’ve suggested updating this to a new “exploits” relationship (i.e., Malware -> exploits -> Vulnerability) for semantic clarity. This would be a breaking change, but our thinking is that there would be far less confusion as to what this means.


My own thoughts:

  1. I feel like name should be flexible – we already have the samples property for capturing the information about the binaries associated with the malware, including their filenames.
  2. “Exploits” is much clearer and preferable than “targets” with regards to vulnerabilities (I’ve never seen any malware reporting which states that malware “targets” a vulnerability) so it’s worth making a breaking change for this.


[1] https://docs.google.com/document/d/15qD9KBQcVcY4FlG9n_VGhqacaeiLlNcQ7zVEjc8I3b4/edit#heading=h.73mue8q00k8




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