Lennaert89's Avatar

Lennaert89

@lennaert89

Interested in infosec / hacking / osint / dfir / bugbounty! Formerly Zerocopter.com, currently Head of Triage at Intigriti.com Head CSIRT over at divd.nl Hacknotcrime Advocate Aut viam inveniam aut faciam.

799
Followers
283
Following
23
Posts
07.07.2023
Joined
Posts Following

Latest posts by Lennaert89 @lennaert89

Post image
30.05.2025 14:47 πŸ‘ 104 πŸ” 24 πŸ’¬ 2 πŸ“Œ 0
Community sponsor announcement with BSides Leeds and Damn Good Security logos

Community sponsor announcement with BSides Leeds and Damn Good Security logos

⚫ Sponsor Announcement β€” Welcome Damn Good Security! ⚫

We’re excited to welcome Damn Good Security as a Community Sponsor for BSides Leeds 2025!

Events like ours wouldn't be possible without the support of incredible sponsors β€” massive thank you to the DGS team!

27.05.2025 14:01 πŸ‘ 3 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Post image Post image

Ready to kick off @1ns0mn1h4ck.bsky.social day 2! Hit me up if you want to connect and chat #bugbounty, send a message or find me in my @intigriti.com hoodie. Got some cool stickers to hand out!

14.03.2025 08:01 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Post image Post image

Attending the amazing @1ns0mn1h4ck.bsky.social to represent @intigriti.com today!

Hit me up if you want to chat. I've got stickers and invite codes to hand out πŸ˜‰.

13.03.2025 10:27 πŸ‘ 6 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

Tickets for next year’s Dutch hacker camp are on sale! πŸ€‘

I went to all of the camps (HAL, WTH, HAR, OHM, SHA, MCH and WHY) since 2001 and don’t plan to stop ⛺️

06.12.2024 07:38 πŸ‘ 8 πŸ” 5 πŸ’¬ 1 πŸ“Œ 0

Nice

02.12.2024 19:06 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Old HITB and current OrangeCon crew FTW!

27.11.2024 21:36 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
OrangeCon

I want to do a little promotion here as well:

For the dutch people following me: last year me and 2 other folks from HITB dutch crew started orangecon.nl.

Its a nonprofit which focusses on knowledge sharing with affordable trainings followed by a very affordable conference. Do check it out please!

27.11.2024 17:53 πŸ‘ 8 πŸ” 6 πŸ’¬ 1 πŸ“Œ 1

I enjoyed it, though the ending was a bit weird. Had fun shooting at things overall.

27.11.2024 16:45 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Congrats!

26.11.2024 23:49 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Same

26.11.2024 23:47 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Haha I have presentations about this too. Has a beautiful iceberg image about red teaming in it as well iirc

26.11.2024 22:02 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Don’t think it’s a bad idea at all, just don’t sell it as something incredibly advanced, or as the replacement of a skilled human manual testing things. Or sell it as anything else that it’s not for that matter.

26.11.2024 21:56 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Yes I will call it the threaty threat automated continuous security solution powered by AI.

What it actually is:
We run Nessus once a week and use chatGPT to generate reports from the scan results.

26.11.2024 21:49 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Now make it AI powered and double that again ..

26.11.2024 21:46 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Preview
CVE-2024-8856 - Unauthenticated RCE via Arbitrary File Upload Hacked.be | Cybersecurity blog by Rein Daelman.

CVE-2024-8856 is out! This is my 7th CVE, but my first critical one.

TL;DR

Unauthenticated RCE via Arbitrary File Upload (thanks to some very questionable file type validation).

Already posted on X, but wanted something on my profile... πŸ˜…

#BugBounty #Security

Write-up:
hacked.be/posts/CVE-20...

24.11.2024 14:49 πŸ‘ 10 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

Yes but if you call it that you can’t charge the same.

26.11.2024 21:15 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Had fun finishing the black ops 6 campaign this weekend!

25.11.2024 00:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

It sounds like this would finally fix my back to be honest

24.11.2024 09:50 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

It’s on!

22.11.2024 20:35 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Pff it’s far too early to be on a train

19.11.2024 06:23 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Mornin!

19.11.2024 06:23 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Love seeing this place get more active, I’ll try to to share a bit more on here

17.11.2024 18:57 πŸ‘ 6 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

OMG hax0r

15.11.2024 16:44 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

So anyone on here talking about #bugbounty?

22.09.2023 15:25 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Wait you onlyDans lot now also have representation in my home town :O

16.07.2023 21:27 πŸ‘ 2 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Welcome!

11.07.2023 22:06 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Pff what a day :(

10.07.2023 21:47 πŸ‘ 6 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0