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EFForg
rayhunter
Rust2025–2026
EFForg / rayhunter

rayhunter

Rust tool to detect cell site simulators on an orbic mobile hotspot

Mobile & Desktop
Explore on GitHubRead Hacker News discussions
7Distinct people
8Mentions
0Explicit recommenders
6.1KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Rust tool to detect cell site simulators on an orbic mobile hotspot

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 1:49:46 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by month8 dated mentions

Observed mentions: 2025-03-06 19:04:12 UTC to 2026-10-12 18:38:57 UTC.

0122025-03-01 00:00:00 UTC to 2025-04-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 commentsMar 20252025-04-01 00:00:00 UTC to 2025-05-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2025-05-01 00:00:00 UTC to 2025-06-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2025-06-01 00:00:00 UTC to 2025-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2025-07-01 00:00:00 UTC to 2025-08-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2025-08-01 00:00:00 UTC to 2025-09-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2025-09-01 00:00:00 UTC to 2025-10-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2025-10-01 00:00:00 UTC to 2025-11-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2025-11-01 00:00:00 UTC to 2025-12-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2025-12-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 commentsDec 20252026-01-01 00:00:00 UTC to 2026-02-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2026-02-01 00:00:00 UTC to 2026-03-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-03-01 00:00:00 UTC to 2026-04-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-04-01 00:00:00 UTC to 2026-05-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-05-01 00:00:00 UTC to 2026-06-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-06-01 00:00:00 UTC to 2026-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-07-01 00:00:00 UTC to 2026-08-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-08-01 00:00:00 UTC to 2026-09-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2026-09-01 00:00:00 UTC to 2026-10-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-10-01 00:00:00 UTC to 2026-11-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsOct 2026

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
Mar 20252025-03-01 00:00:00 UTC2025-04-01 00:00:00 UTC110
Apr 20252025-04-01 00:00:00 UTC2025-05-01 00:00:00 UTC000
May 20252025-05-01 00:00:00 UTC2025-06-01 00:00:00 UTC000
Jun 20252025-06-01 00:00:00 UTC2025-07-01 00:00:00 UTC000
Jul 20252025-07-01 00:00:00 UTC2025-08-01 00:00:00 UTC000
Aug 20252025-08-01 00:00:00 UTC2025-09-01 00:00:00 UTC000
Sep 20252025-09-01 00:00:00 UTC2025-10-01 00:00:00 UTC202
Oct 20252025-10-01 00:00:00 UTC2025-11-01 00:00:00 UTC101
Nov 20252025-11-01 00:00:00 UTC2025-12-01 00:00:00 UTC000
Dec 20252025-12-01 00:00:00 UTC2026-01-01 00:00:00 UTC000
Jan 20262026-01-01 00:00:00 UTC2026-02-01 00:00:00 UTC202
Feb 20262026-02-01 00:00:00 UTC2026-03-01 00:00:00 UTC000
Mar 20262026-03-01 00:00:00 UTC2026-04-01 00:00:00 UTC000
Apr 20262026-04-01 00:00:00 UTC2026-05-01 00:00:00 UTC000
May 20262026-05-01 00:00:00 UTC2026-06-01 00:00:00 UTC000
Jun 20262026-06-01 00:00:00 UTC2026-07-01 00:00:00 UTC000
Jul 20262026-07-01 00:00:00 UTC2026-08-01 00:00:00 UTC000
Aug 20262026-08-01 00:00:00 UTC2026-09-01 00:00:00 UTC101
Sep 20262026-09-01 00:00:00 UTC2026-10-01 00:00:00 UTC000
Oct 20262026-10-01 00:00:00 UTC2026-11-01 00:00:00 UTC101

What Hacker News says

8 sources
oger·Oct 12, 2026
Yes there absolutely are! The EFF has the Rayhunter project at https://github.com/EFForg/rayhunter - it is basically an IMSI catcher catcher. You install it on a pocket router and it detects typical signatures that IMSI catchers use, for example telling your mobile to downgrade from LTE to 2G making it easy for them to tell your device to join THEIR network and read the IMSI / IMEI for your device and possibly route your traffic through their network. The device with Rayhunter installed will notify you when these signatures are being detected and you get a pcap file that you can dissect using Wireshark. There are other tools that you can install on Android devices but Rayhunter certainly is a good start if you want to detect the use of IMSI catchers. One caveat: IMSI-catching is a cat-and-mouse game, so no promises can be made that the Ra
Read the rest
yhunter heuristics catch all attacks.
In Feds got warrants to use fake cell towers to hunt down Don Lemon's producer
leetrout·Aug 21, 2026
Glad this one is getting the "second chance" bump back to the front page. It's great content and it's timely. It's a great video. If you're not inclined to watch the video I'll save you a click to the youtube description and add a bit more detail than the earlier sibling for the devices shown: Simulacra "Simulacra continuously fabricates a churning crowd of plausible-but-fake wireless devices around you — drowning your real devices in noise so that passive trackers, ALPR add-ons, and co-travel correlators can't reliably pick your signal out of the crowd — while passively watching for the trackers that follow you." https://github.com/Em3ritus/simulacra --- Biscuit Ultra "Wardriving Platform: A Full WiFi & BLE Security Toolkit. A headless wireless security research platform controlled entirely from your phone via Bluetooth. The platform sup
Read the rest
ports dual-band WiFi (2.4GHz + 5GHz), Bluetooth Low Energy scanning and attacks, wardriving with GPS mapping, packet capture, and much more" https://biscuitshop.us/products/biscuit-ultra --- Rayhunter "Rayhunter is a project for detecting IMSI catchers, also known as cell-site simulators or stingrays. It was first designed to run on a cheap mobile hotspot called the Orbic RC400L, but thanks to community efforts, it can support some other devices as well." https://github.com/EFForg/rayhunter --- OUI Spy "ESP32-S3 multi-mode surveillance-detection board" • Foxhunter — single-target RSSI-proximity tracker for radio direction finding • Detector — multi-target BLE scanner with OUI filtering + web config portal • PCAP — raw 2.4GHz Wi-Fi packet capture, Wireshark-ready (dev branch) • BLE Sniff — raw Bluetooth LE advertising capture, Wireshark-ready (dev branch) • Flock-You — Flock cam detection with GPS wardriving, JSON/CSV/KML export https://colonelpanic.tech/ https://github.com/colonelpanichacks/oui-spy
In The coolest anti-surveillance tools at Defcon [video]
nickthegreek·Jan 8, 2026
whenever this topic comes up, I like to point people to EFF's Rayhunter. https://github.com/EFForg/rayhunter > Rayhunter is a project for detecting IMSI catchers, also known as cell-site simulators or stingrays. It was first designed to run on a cheap mobile hotspot called the Orbic RC400L, but thanks to community efforts, it can support some other devices as well. And https://bitchat.free/ > bitchat is a decentralized peer-to-peer messaging application that operates over bluetooth mesh networks. no internet required, no servers, no phone numbers.
In ICE's Tool to Monitor Phones in Neighborhoods

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