STIX2MISP

STIX2MISP is a simple python script that grabs the pertinent information from a valid STIX 1.2 file and attempts to import the relevant IOC information into MISP.

FULL DISCLOSURE: STIX is an ever-evloving and complex platform. While I did my best to pull out the relevant information from the valid STIX samples I frequently see, there is a TON of info that this script leaves out. If you find something you want in MISP that isn't getting grabbed from your STIX files, feel free to submit a PR and I'll be happy to merge it in.

Requirements

• PyMISP: https://github.com/MISP/PyMISP
• python-stix: https://github.com/STIXProject/python-stix

Usage

Make sure your misp_url and misp_key variables are set in the main call. These are the full URL of your MISP instance and your user's MISP API key. Then just run:

python stix2misp.py -i <file_name>

To see other options, such as tagging:

python stix2misp.py -h

The script will run do its best to output what it sees in the STIX file. The script will create a new event when run. If it runs across the below STIX objects, it will add those objects as attributes to that event in MISP.

• FileObjectType
  • Filename
  • Size and Path (as comments)
  • Hashes:
    • md5
    • sha1
    • sha256
    • ssdeep
• MutexObjectType
  • Mutex name
• WindowsRegistryKeyObjectType
  • Key/Value
• DomainNameObjectType
  • domain
• URIObjectType
  • URI
• EmailMessageObjectType
  • sender/from
  • recipient
  • subject
  • reply_to (as email src)
  • x-originating IP (as ipsrc)

The script will also process Incident and Indicator descriptions it finds, combine them into a Incident_Descriptions.txt or Indicator_Descriptions.txt file, and upload those files to the event.

TO-DO

• Add support for MISP certificate checking
• Add src/dst IP support
• Add basically everything that's important in STIX and is not currently on the above list...
• Auto-check for STIX v 1.2, and if not seen, use stix-ramrod to make it v 1.2.