$ ctf42

OSINT CTF challenges

685 OSINT CTF challenges from 134 CTFs (2019–2026), 33 with writeups.

Top osint techniques

#osint 12 #geolocation 9 #reverse-image-search 5 #image-geolocation 2 #social-media-osint 2 #exif-metadata-comment 1 #google-maps-street-view 1 #signage-osint 1 #google-maps 1 #exif-metadata 1 #image-geolocation-osint 1 #log-analysis 1

Challenges

Filter and sort these in the challenge browser →

Challenge CTF Weight Has
Town_Tour_02 V1T 2026 22.14 files
Tragedy 0xFUN 2026 17.74 files
Trivago BrunnerCTF 2026 24.66 files
UNNAMED_MERCHANT LYKNCTF 2026 – files
Uncharted_Tides Z0d1ak 2026 Quals 25.00 files
Understand_me_pls Universal 2026 25.00 files
Unknown_Artist BrunnerCTF 2026 24.66 files
Utopia_1 ApoorvCTF 2026 24.10 files
Vali_Validatorul CTF@AC 2026 Quals – files
Viewing_Point TaipanByte 2026 – files
Vinyls MntcrlCTF 2026 25.00 files
Visiting_Belorussian_Grandfather NewYear 2026 23.42 files
War_Chants DalCTF 2026 24.90 files
We_Have_at_Home UMassCTF 2026 65.95 files
What_Does_the_Cat_Say LYKNCTF 2026 – files
Where HackAstra 2026 – files
Where_Are_You_Really PsychCTF 2026 24.51 files
Where_Was_chine MidnightFlag 2026 24.50 files
Where_Where HackAstra 2026 – files
Where_dis THEMCTF 2026 – files
Where_in_the_World_is_Scott_Dourque BYUCTF 2026 – files
Where_is_my_Faculty KubSTU 2026 24.83 files
Where_on_Earth ScriptCTF 2026 – files
Where_theres_smoke_theres_fire. BoroCTF 2026 – files
Whispers_in_the_Walls PsychCTF 2026 24.51 files
Who_is_this... Axiom 2026 – files
Whos_That_Pokemon DUCKERZ 2026 – files
Whos_house_is_this BKCTF 2026 – files
You_Cant_Poop_There DalCTF 2026 24.90 files
You_Snoze_You_Loze TexSAW 2026 41.59 files
babyOSINT NewYear 2026 23.42 files
buffalo VuwCTF 2026 25.00 files
connected VuwCTF 2026 25.00 files
cousin MntcrlCTF 2026 25.00 files
cousin VuwCTF 2026 25.00 files
day_walk CTF@AC 2026 Quals – files
festi VuwCTF 2026 25.00 files
foreigner MntcrlCTF 2026 25.00 files
get_zucked Z0d1ak 2026 Quals 25.00 files
grocery_run CTF@AC 2026 Quals – files