2020from public repositories
IRSInternalCTF 2020
19 challenges with 19 published solutions between them. CTFtime has no listing for this event at all, so nothing built on CTFtime can show what it was made of. These writeups were found in public repositories instead. Each link is pinned to the commit it was read from.
Where these writeups liveUncategorised14
The upstream scoreboard did not say, so neither do we.
Admin at work
1 official solutionBig Brother Secrets
1 official solutionCells at work
1 official solutionDynamic Library
1 official solutionFluffy 2.5
1 official solutionFluffy I
1 official solutionFluffy II
1 official solutionFluffy III
1 official solutionSupreme PDF Hoster
1 official solutionThe C of CP
1 official solutionTVOIT
1 official solutionXtreme Static Sites
1 official solution
Steganography5
Find the payload hidden inside a carrier that looks ordinary. Bit planes, appended data, metadata, and audio spectrograms.
Solve it with:LSB steganography extractorPNG chunk analyzerAudio spectrogram and SSTV decoderZero-width character and text steganography decoderLearn: Steganography
Special Stego I 3D Room
1 official solutionSpecial Stego II Picturesque Mountains
1 official solutionSpecial Stego III A Child's Drawing
1 official solutionSpecial Stego III A Child's Drawing Various Solutions
1 official solutionSpecial Stego IV Sunset and Mountains
1 official solution