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Kevin Beaumont

@GossiTheDog@cyberplace.social View on cyberplace.social

Cybersecurity weather person and award winning shitposter. Shitposting is an anagram of Top Insights. You may be surprised to know I am not representing my employer here and these are not their opinions.

I have Direct Messages disabled - you can send them, but I will never receive them.

My website
doublepulsar.com
Github
github.com/GossiTheDog
Signal
GossiTheDog.1337
  • 16 posts
Kevin Beaumont @GossiTheDog@cyberplace.social

The Financial Times report Anthropic’s IPO is now likely to receive a Junk credit rating, according to the anchor investor in the deal.

Anthropic, Blackstone, KBRA, Morningstar DBRS and S&P declined to comment. Fitch and Moody’s did not respond to requests for comment.

ft.com/content/59383c7f-8d82-4

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Kevin Beaumont @GossiTheDog@cyberplace.social

Northflank, the AI platform, has gone offline after a full blown security breach. Environment variables for access to automation at their customers have been decrypted and exfiltrated.

"Multiple users are confirmed that their AI keys have been used".

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Kevin Beaumont @GossiTheDog@cyberplace.social

I'm confirmed the new, replacement versions Anthropic published overnight (which auto update) do *not* remove the prior backdoors and recon activity. So SSH still reverse calls out etc, you need to manually remediate every impacted VSCode and Cursor system.

Anthropic *must* tell customers what happened in a completely transparent way.

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Kevin Beaumont @GossiTheDog@cyberplace.social

C2 server collected for each victim endpoint:

- hostname
- username
- OS
- architecture
- home directory path
- environment variable names
- working directories
- configured Git email

It then ran a reverse SSH connection allowing the threat actor to pick and chose which victims to have hands on keyboard access to.

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Kevin Beaumont @GossiTheDog@cyberplace.social

Threat actor's C2 server is now offline.

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Kevin Beaumont @GossiTheDog@cyberplace.social

I've written a blog - Anthropic have been hacked to deliver remote access malware to millions of endpoints where developers use Claude Code.

doublepulsar.com/anthropic-hac

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Kevin Beaumont @GossiTheDog@cyberplace.social

Anthropic's Claude Code Cursor extension was also compromised, same remote access backdoor cursor.com/blog/claude-code-ex

Anthropic still haven't admitted what has happened.

Cursor Security notice — malicious version of Anthropic.claude-code (2.1.313) identified in the Cursor Extension Marketplace · Cursor Today we identified a security incident involving a specific extension package in the Cursor VS Code extension Marketplace: Anthropic.claude-code version 2.1.313.

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Kevin Beaumont @GossiTheDog@cyberplace.social

FWIW the compromised version, 2.1.313, was removed from OpenVSX. 2.1.314 is the ‘fixed’ version.

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Kevin Beaumont @GossiTheDog@cyberplace.social

Anthropic got compromised.

Their Claude Code extension on Visual Studio has malware in it, which creates a remote access Trojan to desktops.

phorion.io/blog/offical-claude

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Kevin Beaumont @GossiTheDog@cyberplace.social

Here's Proton's AI manifesto in full, leaked. It's proper brainrot management stuff.

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Kevin Beaumont @GossiTheDog@cyberplace.social

Bluesky have started blocking links to @ddosecrets

wired.com/story/bluesky-blocks

There is no central blocking function in Mastodon. Do not in any way retoot this link ddosecrets.org/article/icepick

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Kevin Beaumont @GossiTheDog@cyberplace.social

Impose cost by moving, the CEO might stop thinking like this when reality hits.

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Kevin Beaumont @GossiTheDog@cyberplace.social

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Kevin Beaumont @GossiTheDog@cyberplace.social

Anthropic’s SEC filing is amazing. It describes itself as the most important company in human history, then if you keep reading it’s like

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Kevin Beaumont @GossiTheDog@cyberplace.social

@isotopp did you just use AI to argue with a post? 🤣

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Kevin Beaumont @GossiTheDog@cyberplace.social

RE: techhub.social/@Techmeme/11751

Companies when they get their real Claude bill in three years

Techmeme @Techmeme@techhub.social · open

S-1: Anthropic spent ~$2.50 on compute and infrastructure for every $1 of revenue in Q1 2025, falling to under 50 cents in Q2 2026, as it seeks profitability (Financial Times)

ft.com/content/a6c43402-719e-4
techmeme.com/261027/p5#a261027

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