Using Bitcoin OP_RETURN for Command and Control

Today’s article is a fun one. The story it describes is not new, but it has resurfaced recently following a blog post by Google’s Threat Analysis Group (TAG). A story of how a group of criminals has used (and, to the extent to what we know, still uses) Bitcoin in a quite unexpected way: to send data to their malware. Its name was Glupteba Quoting Google, Glupteba is “known to steal user credentials and cookies, mine cryptocurrencies on infected hosts, deploy and operate proxy components targeting Windows systems and IoT devices”....

December 11, 2021 · 4 min · Fanis Michalakis

Chainalysis to Launch Lightning Network Support

Chainalysis announced today that they are going to lauch support for Lightning Network transaction monitoring. This new feature would be integrated into KYT (Know Your Transaction), one of the main products of Chainalysis that supposedly helps businesses and services stay in line with regulation by providing them with transaction monitoring and traceability tools. In its blog post, the company didn’t detail how they plan on monitoring transactions on the Lightning Network....

December 10, 2021 · 3 min · Fanis Michalakis

How a State Can Subvert Bitcoin

This post contains my first thoughts following the reading of FX Thoorens' article How a state can hack Bitcoin. I recommend giving this one a read first. In his article, FX distinguishes between two very different attack vectors on Bitcoin: the mathematical part of the protocol the human factor. FX then highlights how the mathematical part is an unpreignable Citadel, but how the human constituents of the network still are very frail blockhouses....

December 9, 2021 · 2 min · Fanis Michalakis

Dancing Forbidden

Today, I sent the equivalent of several thousands of dollars (not mine) in Bitcoin. I did not ask for permission. Nobody could stop me from doing it. On Friday, I won’t be allowed to dance in bars and restaurants. ⚡🇫🇷FLASH - Il sera interdit de danser dans les bars et restaurants en France à partir de vendredi matin jusqu'au 6 janvier inclus. (décret) — Brèves de presse (@Brevesdepresse) December 8, 2021

December 8, 2021 · 1 min · Fanis Michalakis

Bitwage Announces First Salary Paid Through Lightning

Bitwage announced today that it conducted the first ever salary payment over the Lightning Network. We're thrilled to announce that we have successfully conducted the world's first salary payment through Lightning! Our recipients were @bernard_parah and @alexcrognale. Special thanks to everyone who helped make this happen: @walletofsatoshi, @voltage_cloud, and @acinq_co. pic.twitter.com/lIra282ISf — Bitwage (@Bitwage) December 6, 2021 I personnaly found the news quite interesting, because the idea of getting paid, not only in Bitcoin, but also on the Lightning Network, opens for some intriguing considerations....

December 7, 2021 · 4 min · Fanis Michalakis