Questions tagged [entropy]
Entropy as a measurement of information density is used particularly in reverse code engineering (RCE) to tell apart compressed or encrypted pieces of data (or even code) from plain data.
6
questions
-1
votes
1
answer
939
views
Best way to find the entropy of an EXE file?
I want to write a script to extract the entropy of each sections of an EXE file. What is the best tool that I can use to do this?
I tried Ghidra but it doesn't have an entropy API which I can use.
1
vote
1
answer
371
views
What does entropy mean and how can it be used? [duplicate]
I'm playing around with binwalk -E and am just looking at some entropy graphs as I try to reverse engineer some CTF binaries. I kinda understand the use of data/information entropy in cryptography (it'...
5
votes
5
answers
11k
views
What is an entropy graph
I am new to reversing and I see a tool Detect It Easy and it has a feature called Entropy. I want to know what it is used for?
- 53
0
votes
1
answer
672
views
Can anyone help me identify and decode this string? [closed]
Below is a part of a code that I reversed with repy2exe and I want to understand what it does and especially how to decode the value in the "secret" variable:
using = [
'Mg==\n',
'MTA1\n',
...
- 3
1
vote
1
answer
131
views
Removing randomness from program execution
So I have a program which is highly obfuscated and generates a unique output every time. For ease of reversing I want to make it so that the output is the same for every run (following the logic that ...
- 36
1
vote
3
answers
2k
views
How does PeID calculate entropy?
I'm curious about the entropy field value that shows up when a binary is dropped into PeID. Does someone know how it arrives upon this value?
user1743