moreutils: small browser tools that do one thing
Nine free browser tools, with screenshots and the architecture behind each. Inspired by Joey Hess's moreutils.
Kevin Pham / deoxy
I’m Kevin Pham.
I reverse engineer things, investigate security failures, and build things that tend to require an explanation.
Read the latest notes↓
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0 connected · – · – ms
Latest writing
13 entries, newest first13entries · newest first
02 PGP for normies
I built moreutils/secrets to keep sensitive strings out of chat transcripts. The work was in the UX.
03 cfcanary: steal these credentials
Leave fake credentials where they shouldn't be touched. Get an alert when they're used. Canary tokens on your domain, in your Cloudflare account.
04 TCP over Microsoft Teams: a covert C2 channel for bulk data transfer
I tunneled a real IP link through Teams video calls by hiding packets in H.264 SEI NALs: 2.15 Mbps over three bonded meetings, byte-verified.
05 An eMudhra CA private key was literally 4
An approved export test derailed eMudhra's key ceremony. Eight weak CA keys got certified. Why did a legitimate deployment need this procedural exception?
06 Giant Steps: an adversarial audio modem that survives noise cancellation
Voice calls erase modem tones. I built a Rust modem that sends bytes as vowels and uses the spare pitch channel to play Coltrane. Listen to it work.
07 BrowserDefense: The browser is part of the endpoint
Browser-side telemetry for detection and response, with a working demonstration of Shadow Detection following page structure across changing domains.
08 From a U.S. Defense Contractor to Chinese Crypto Thieves
Tracing Coruna's spread into Chinese crypto theft through recovered iPhone exploits, wallet-stealing code, and a 5,000-USDT retail integration offer.
09 Dynamic Code Loading: But you consented, right?
Similarweb's extension harvests AI chats and browsing history. A remote server supplies its next instructions. Why does Google let it?
10 I put a Fly Brain in an RC car to sniff WiFi
I wired a simulated fly brain to an RC car, turning WiFi into smell and neural spikes into motion. What worked, what broke, and what still needed my code.
11 I Became the Action Replay for My Truck
Root in my truck’s Android head unit was trapped by SELinux — until I flipped one byte, rewrote my identity, and raced Mario Kart on the dashboard.
12 Inside UNC6671's Browser Implant
Source analysis of UNC6671's Chrome implant: DevTools control, keylogging, storage theft, camera capture, and durable detection.
13 I Nearly Hit Dial-Up Speeds Over a Guitar Cable
A from-scratch OFDM modem in Rust: almost 28.8k over a 30-foot guitar cable, plus a checksum-valid TCP/IP link over virtual audio.