OCCRP Aleph is a huge database created by investigative journalists who report on white collar crime and corruption. It can be leveraged for any open source investigation and should be a mandatory tool in your OSINT belt.
In this quasi-investigative piece I explore various layers of Iranian digital ecosystems, providing a good deal of resources for starting open source enquiries into Iran.
A New Year guide to methods of verifying news, images and videos from conflict zones. To illustrate these methods I am referring to a very recent example of a terrorist attack on a naval base and an airport in Kenya.