←back to thread

1369 points universesquid | 1 comments | | HN request time: 0s | source
Show context
DDerTyp ◴[] No.45170133[source]
One of the most insidious parts of this malware's payload, which isn't getting enough attention, is how it chooses the replacement wallet address. It doesn't just pick one at random from its list.

It actually calculates the Levenshtein distance between the legitimate address and every address in its own list. It then selects the attacker's address that is visually most similar to the original one.

This is a brilliant piece of social engineering baked right into the code. It's designed to specifically defeat the common security habit of only checking the first and last few characters of an address before confirming a transaction.

We did a full deobfuscation of the payload and analyzed this specific function. Wrote up the details here for anyone interested: https://jdstaerk.substack.com/p/we-just-found-malicious-code...

Stay safe!

replies(5): >>45170393 #>>45170458 #>>45172015 #>>45173594 #>>45180351 #
__MatrixMan__ ◴[] No.45173594[source]
We should be displaying hashes in a color scheme determined by the hash (foreground/background colors for each character determined by a hash of the hash, salted by that character's index, adjusted to ensure sufficient contrast).

That way it's much harder to make one hash look like another.

replies(2): >>45173822 #>>45174403 #
Spivak ◴[] No.45173822[source]
Not sure why you're being downvoted, OpenSSH implemented randomart which gives you a little ascii "picture" of your key to make it easier for humans to validate. I have no idea if your scheme for producing keyart would work but it sounds like it would make a color "barcode".
replies(2): >>45175884 #>>45179452 #
1. __MatrixMan__ ◴[] No.45175884{3}[source]
If you ignored the characters and just focused on the background colors, yeah I suppose it would look like a barcode. But the way I envision it, each line on the barcode is a character, so it still copy/pastes into notepad as the original text, but it'll copy/paste into word as colored text with colored background.