[PlaidCTF 2017] [Reverse 200 – zamboni] Write UpI heard you like art. Here’s an art recognizer!
Note:
If you have trouble submitting the flag, try just submitting flag content that is in between { and }.
That was a pretty interesting RE challenge, with a few unusual stuff. Big thanks to the author for the fun.
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[H4ckIT 2016] [REVERSE 135 – BiTwins] Write UpEN: These crazy twins are driving me crazy! They know something I don`t. They are simply playing with me!
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[NDH 2016] [Web 250 – Classroom] Write UpWe were facing a service that was hiding himself, jumping from port to port
Question: Follow the course, get the Flag
[NDH 2016] [Forensics 150 – Draw Me a Sheep] Write UpIt is starting to become a usual kind of challenge.
we are given a pcap file with the registered usb traffic of an unknown device which should lead to the drawing of a Flag.
draw me a ship
Question: Draw me a Flag
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[sCTF 2016] [CODE 130 – I Can’t Get No Satisfaction] Write UpI’ve got another task for you involving my little language, Prop!
It consists of the following expressions (denoted
e):
- Boolean constants, written
trueandfalse.- Boolean variables, written as any alphabetical string.
- Implies, written
e -> e.- Equivalence, written
e <-> e.- Negation, written
!e.- And, written
e && e.- Or, written
e || e.You can also parenthesize any expressions or subexpressions (so, you can write
(a || b) && c). Here’s another example program:(a || b) && c && d && (!d || b) || (b -> c) && (d <-> a)This time, I’ve determined that the attached program is satisfiable, but I want to know the actual values that make this program satisfiable. Can you find me a satisfying model, please? When you’ve found one, submit a GET request to our server. Any missing keys are considered false.
Here’s an example request:
http://problems3.2016q1.sctf.io:11420/?a=true&b=true&c=falseThis request would treat
aandbastrueandcand the rest of the variables asfalse. Thus, it’s only necessary to assign the true keys to the value true.
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