Ange Profile picture
May 19, 2019 3 tweets 1 min read Read on X
Our 2nd child now started being unfair and blaming us for whatever act of laziness he came up with.
Fun times ahead.
Feel free to rent a teen - it's extremely efficient when your life is depressing.

I miss so much when they were just innocently needing attention.
Dad, you suck.
Dad, it's your fault that I didn't do X or didn't get Y.
Dad, I know best.
I stopped counting how many times I cheered someone up (with no kids or just very young ones) by just telling what happened recently at home.

#Sh*tMyTeenSays

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More from @angealbertini

Sep 23, 2022
ICYDK the issue 0x14 of PoC or GTFO has articles about PostScript, GIF, PDF and NES (code) hashquines by @teh_gerg, @__spq__ , @makomk, @ESultanik and @evan_teran.
github.com/angea/pocorgtf…
The issue itself is a PDF/NES hashquine.
And @doegox’s small article about putting the MD5 on the front cover of the PDF via PDFLaTeX.
Rogdham did a very nice write-up about GIF hashquines. rogdham.net/2017/03/12/gif…
Read 4 tweets
Sep 9, 2020
From a file format perspective, it's pretty cool to get different payloads - both authenticated - from the same ciphertext with different keys.

It's a neat way to exploit key rotation: clean now, malicious tomorrow.
Naturally, from a format perspective, it was always doable with any form of polyglots, as both formats typically don't overlap.
However, it's even more powerful: when one format is decrypted, the other format is garbled, which bypasses polyglot blacklisting (easy PDF polyglots).
Also, it's possible to bruteforce nonce to get some overlapping bytes, which enables polyglots unique to crypto-polyglots, such as PDF-PE (get the PDF you want now, it becomes Wannacry later).
Read 5 tweets
Aug 8, 2020
When people ask me about the French language,
I tell them about "99 birds".

Why... what could go wrong?...
We read 99 as 'quatre vingt dix neuf' (4 20 10 9),
because 4*20=80 and 80+10+9 = 99 ;)

yes, '4 20' is the official way in France to read "80".

In other countries, they sometimes say "80" huitante (8 = huit),
which makes sense since 60 is soixante, even in France (6 = six).
Seriously, my son thought I was joking when I told him about 99 for the first time.
Especially because it requires to understand multiplication, which is a lot more complex than adding 1 or 10 for him at the time...
Read 5 tweets
Aug 2, 2020
MP3 players... Cubic Players ImageImage
DOSAmp ImageImage
WinPlay3 ImageImage
Read 4 tweets
Jul 28, 2020
Recap thread on files set I've contributed to depending on your needs.

Mocks to understand magic signatures
A polymock to demonstrate magic abuse
github.com/corkami/pocs/t… Image
borderline valid but usually content-less files
github.com/mathiasbynens/…
Read 5 tweets
Jul 27, 2020
FWIW I made a set of minimal but self-descriptive pics of common file formats.
github.com/corkami/pocs/t… Image
PoCs, not pics.
ICYDK I made posters that explains some of these formats
github.com/corkami/pics/b… Image
Read 5 tweets

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