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Information Security Stack Exchange is a question and answer site for information security professionals. It's 100% free, no registration required. has several schemas defining Indicators of Compromise. The Schema is defined here:

While under IndicatorItemContext/search says it is xs:string, the actual list of search terms is listed here:

Is there something similar for IndicatorItem/condition? So far I'm only aware of "contains" and "is" but there doesn't seem to be a definitive list.

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Unsure of where you can get a list from, but the IOC Editor may have visibly similar options. Meaning, you can browse the options to see what is available, and how it works. I'd also have a look at IOC Finder to see what options are available on that as well.

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Hi, thanks the IOC editor has contains, is, contains not and is no, which I guess is definitive enough. I didn't think to use the IOCe! – A G May 30 '13 at 8:51
"is no" in your comment should be "is not" - so the list of options would be: "contains", "is" "contains not" and "is not". I'm just repeating this because without the quotes your comment is hard to read. – Scott Wilson Nov 7 at 13:26

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