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Mark LZ

@strcpy@infosec.exchange
  • Open on infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

0 Followers
0 Following
19 Posts
Joined November 18, 2022
Twitter:
https://twitter.com/strcpy

Posts

Open post
strcpy
Mark LZ @strcpy@infosec.exchange · 6d ago
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange
Relatable? Found some debug messages pasted in one of my recipes for whatever reason.
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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Apr 24, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

Censys now speaks the MCP protocol. And it's absolutely bonkers how many of these things let you RCE

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Apr 13, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange
Replying to @ghostsarespooky@infosec.exchange
@ghostsarespooky@infosec.exchange Yeah, I flipped the fuck out.
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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Apr 13, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

Gnome should consider renaming processes that cause high CPU. tracker-miner-fs-3 is a TERRIBLE name to see in top.

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Apr 08, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

jeez. Sonnet + binaryninja is freaking scary.

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Apr 02, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

apparently i have the src to the VoidLink 3.0 rootkit (Arsenal team dump). I don't even know if this is interesting. All the Checkpoint research seems to be around "v1.0"

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Apr 02, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

It's absolutely insane and terrifying that you can never get into contact with anyone at a company in an emergency.

This pretty big company has 99% chance of being compromised, and their data is just sitting out there, but nobody at this company responds. Engineers, security staff, CTO... zero response.

They even have a security.txt (as in it doesn't 404), but it's empty.

This is why companies get ransomed. Because if they don't see it, it isn't real.

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Mar 30, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

@jackryder@infosec.exchange and they are being lied to and manipulated. It's gross.

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Mar 30, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

Over the weekend, one of my systems tagged an open directory as russian (language), and I went and looked and saw a very interesting telegram bot:

def generate_post(news):
prompt = f"""
Act as the Admin of the "American Patriot" Telegram channel. Style: Q-community/conspiracy insider.
Interpret news as proof of covert military operation vs Deep State.

CRITICAL RULES:
1. LANGUAGE: Output MUST be in English only. This is an American Patriot channel.
2. PURE AMERICAN ENGLISH: You must write in 100% authentic American English. Do not use any Russian words, slang, or foreign languages.
3. Random start: 😎🇺🇸🕊️⚡️ OR 😎🇺🇸🦅☠️ OR 🇺🇸⚡️ OR 😎🇺🇸🐍🗡️
4. VARIATION: Randomize length (short cryptic vs mid-length analytical).
5. NO REPETITION: Avoid "5D Chess". Use varied buzzwords: White Hats, Cabal, Awakening, Reset, Disclosure, Cleanup.
6. Tone: Triumphant, urgent, and focused on the US Republic.
7. End with a unique short phrase + links.

News: {news['title']} - {news['desc']}
Link: {news['link']}
Channel: @americanpatriotus
"""
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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Mar 13, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

These DOGE kids; We're dealing with very young morons who think they are intelligent because other morons told them they are intelligent.

These depositions are something else.

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Feb 14, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange
Replying to @listless@social.cringecollective.io
@listless I kind of agree. I LOVE cake, though.
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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Feb 14, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

I don't know what's a better feeling: eating cake or a git rebase that didn't totally go ass sideways.

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Feb 13, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

Howdy!

I run the research access program at Censys, which means we not only provide our data to academics but also to anyone with a great idea and a desire to share their findings publicly.

We started as a research project at UMich, and we still run our org like it.

If you're interested!

https://docs.censys.com/docs/research-access-to-censys-data

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Jan 27, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

I've been playing around with the MAVLink protocol, a network protocol for drone management.

It's UDP, and if you send a single "heartbeat" frame, the server will send you back data every second without specifically requesting it again.

I'm thinking mavlink-smurf ...

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Jan 25, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

fuck ICE and fuck ice.

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Jan 20, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

if you're still using inetd in 2026, then you have bigger problems.

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Jan 20, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

I've looked at 8,000,000 squid proxies on the internet, and of those, 8,000 of them are open; meaning there are 8k squid hosts that allow anyone on the internet to proxy through them.

I've also looked at ~3,000,00 SOCKS servers, and of those, only 968 were open proxies.

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Jan 20, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

Mom, I want user-installed packages directory:

/usr/local

but honey, we have a user-installed packages directory at home

user-installed packages at home:

/opt

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Open post
strcpy
Mark LZ @strcpy@infosec.exchange · Jan 15, 2026
Mark LZ
@strcpy@infosec.exchange

You may know me from such logs like: all.pcap, and firewall.log -- research@censys

infosec.exchange

remember that time when some goober created a 200 page specification defining how to represent a human emotion in XML?

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