2 posts tagged with "Investigation"

CTF, a blockchain challenge, clock running. The flag was somewhere down a chain of transactions and I was trying to follow the money by hand — one Etherscan tab, copy the "to" address, paste it into a new tab, scroll, copy the next hop, paste, scroll. Twenty tabs deep I'd lost the thread completely: which branch was I on, had I already seen 0x9f…c2, and was this even the real money or a dust attack dragging me sideways. My teammates were solving things. I was untangling Christmas lights in the dark. We didn't get that flag.

So afterward I built chainmap. Paste an address, it draws the graph — address to address, expanded outward as far as you want. The twenty-tab crawl becomes one picture you can actually read.

When I first discovered the Basel Institute LEARN platform, I wasn't sure what to expect from free online courses about financial crime investigation. After completing most of their self-paced eLearning modules, I can confidently say this is some of the most practical and valuable training I've encountered in the field.