Welcome to Njósnir

Spies had been posted all the way south to Naumudal

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The first post on Njósnir — what this site is, what to expect, and why it is named after the scouts of the sagas.
Published

July 21, 2026

Njósnir is Old Norse for the scouts, the spies — specifically the ones a chieftain sent ahead to watch a place before anyone committed to it. In one of the sagas that gives this site its name, a spy named Helgi spends years tracking an outlaw across the western fjords: watching for smoke rising off a cliff, following a cover story about gathering timber, getting scared off once by a landslide staged by someone secretly loyal to the outlaw. That’s close enough to what reverse engineering feels like most weeks that I stole the name outright.

This site is where that work gets written up. The sample goes into my lab, and eventually something readable comes back out the other side.

What that looks like in practice: unpacking a binary that fights back the whole way through, reading disassembly closely enough to match it against reports someone else already published on the actor behind it, watching what a sample actually does once it thinks nobody’s looking, and occasionally just writing about the lab itself when the tooling turns out to be half the story.

More soon. The ravens are already out.