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Questions tagged [byte-code]

Assembler-like language destined to be executed in an interpreter, in a virtual machine or by just in time compilation. Java, Python and many other high-level languages are using bytecode languages.

0 votes
0 answers
57 views

Byte code python 3.10.10

I’am dealing with challenge in my study but i didn’t find solution could anyone give me hint : import re import string from types import CodeType import random banner = """ -----------...
ReVerser's user avatar
0 votes
0 answers
77 views

Help to identify intermediate language

I have scripts written in PineScript, TradingView's proprietary DSL. Ultimately, Pinescript code gets translated to an intermediate language (IL) presentation, below is an example: PineScript //@...
drbolsen's user avatar
2 votes
1 answer
83 views

Keycode from a serial PDA keyboard (iPAQ G750)

I have a folding PDA keyboard (model number iPAQ G750). It is using a proprietary serial protocol, I want to adapt it to Bluetooth using a micro controllers. The keyboard sends out a 2-byte keycode ...
Xinming Chen's user avatar
8 votes
1 answer
4k views

Is it possible to use GHIDRA to decode .NET ? (1 lvl crackmes with solution, but not in GHIDRA)

I am a beginner, I want to decode 1 lvl in crackmes, I downloaded a GHIDRA as my main tool. I've got a simple keygen app. Here it is: https://crackmes.one/crackme/5ab77f6433c5d40ad448cb2d. The ...
OREN YT's user avatar
  • 81
4 votes
0 answers
239 views

How to correctly inject a [jump + address] instruction into another process (code injection)?

I am trying to inject a jump instruction into another process (External injection), although the injection operation has been completed the address was not correct. For example: unsigned int addr = ...
Lion King's user avatar
  • 269
4 votes
0 answers
1k views

Understand a function within Hermes byte code

The Android app I am looking at uses React Native with the Hermes JS Engine. This generates a index.android.bundle binary that contains Hermes JS bytecode. I was able to disassemble the binary file ...
A Dark Divided Gem's user avatar
0 votes
1 answer
2k views

Why 0x90 byte is always at top of my file?

Note: Not sure if this kind of question belongs here but as long as this won't fit anywhere else this site is the closest. Back to the topic, I have a python file which I obfuscated it and anytime I ...
RickyLo's user avatar
  • 11
0 votes
2 answers
83 views

why does dalvik remove invocations during optimisation?

This is original smali code of a classes.dex method before installation .method public static createAutoMatchCriteria(IIJ)Landroid/os/Bundle; .registers 6 new-instance v0, Landroid/os/Bundle; ...
Silent's user avatar
  • 164
0 votes
0 answers
634 views

Decompiling exe to python source code

I've recently tried to decompile a .exe to .py source code. It partly went well as the majority of the .pyc got translated into python code but partly also failed. Like the following part: --- This ...
Eva's user avatar
  • 1
0 votes
1 answer
77 views

What character codes could these be?

Good day. I have these character codes in a binary file (Adobe After Effects Project) that represent a string. If I change them the text inside the application changes. However, for the life of me, I ...
Major Despard's user avatar
0 votes
1 answer
124 views

Is the code like this reverse able? (from Assembly - UnityScript)

i try to reverse this code but cant figure it out what is this number mean or how to call it...
EntryEmb's user avatar
4 votes
2 answers
8k views

How can I modify or decompile Hermes JS bytecode?

Since React Native 0.60.4 developers can opt-in to use the Hermes JS Engine. This generates an index.android.bundle binary that contains Hermes JS bytecode. The Hermes documentation mentions hbcdump ...
irgendwr's user avatar
  • 143
0 votes
1 answer
4k views

Recaf: Recompile disabled, can't edit

I've download recaf jar file and install JDK 8. When I execute it/start it, it all works fine with java -jar recaf-2.12.0-J8-jar-with-dependencies.jar. I open a class file also no problem. The issue ...
Marco Fernandes's user avatar
4 votes
0 answers
290 views

Where to start with reversing a custom JavaScript VM?

I have recently ran into the most heavy JavaScript obfuscation I've seen. It is using a custom VM to execute bytecodes. I have never dealt with such obfuscation, and I am wondering where I can start ...
MapF120's user avatar
  • 41
1 vote
0 answers
149 views

SWF ActionScript byte-code method info does not match AVM2 specification

I have a bunch of SWF files that represent UI in the game. Most of them contain DoABC tag, however the tag type is 300 instead of 82. Putting this trouble aside, I started parsing the tag according ...
lolbas's user avatar
  • 121

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