Stfort52

import pandas as pd
import matplotlib.pyplot as plt

def draw_candlestick(data, time_axis, window_size, **kwargs) -> plt.Figure:
    """
    Draws a candlestick chart.

    Parameters:
        data (list or np.ndarray): Continuous data points.
        time_axis (list or np.ndarray): Corresponding time points (timestamps or discrete steps).

Stfort52

from typing import Literal

import pandas as pd


def get_ensembl_mappings(
    genes: list[str],
    organism: str = "hsa",
    server: Literal["www", "eu", "uswest", "asia", "gprofiler"] = "asia",
) -> pd.DataFrame:

Stfort52

Plot pytorch module parameters

A simple implementation.

Stfort52

def ens2seq(ensembl_id: str) -> str:
    """Converts ensembl gene id to protein sequence
    @ensembl_id: str, ensembl gene id
    """
    uri = f"https://rest.uniprot.org/uniprotkb/stream?"

    query = f"({ensembl_id}) AND (reviewed:true)"
    
    params = {
        "compressed": "false",

Stfort52

Stfort52

CODEGATE 2022 Finals VM

Analysis

We are given a virtual machine binary called run, and a custom binary for it called VM. It has 16 registers and a flat memory. Below is the opcodes of this VM.

Then, we should disassemble the given program to see what's going on. disasm.py disassembles the custom binary VM into disassembly.S. Take a look at it.

Stfort52

CODEGATE 2022 Finals verylog

TL;DR

Analysis

These modules,

1. generate six permutation states from fixed seed (T_0)
2. opens key.txt(T_2)
3. reads each numbers from key.txt(T_3)
4. generates answer by permutation (T_1)
5. compares answer with input (T_3)

Stfort52

Google CTF 2022 treebox

Analysis

It's one of those python sandboxing problems. You enter python script, server evaluates....if it passes the filter function below.

def verify_secure(m):
  for x in ast.walk(m):
    match type(x):
 case (ast.Import|ast.ImportFrom|ast.Call):

Stfort52

GCTF 2022 segfault labyrinth

This is a write-up for task segfault labyrinth in google ctf 2022

Analysis

The problem is consisted with a single amd64 binary. What it does is simple. It just runs your shellcode with some limitations. For example, there is a seccomp filter which prevents you from getting new file descriptors.

 line  CODE  JT   JF      K
=================================
 0000: 0x20 0x00 0x00 0x00000004  A = arch

Stfort52

#ifndef __LIB_COLORS_H
#define __LIB_COLORS_H

#ifndef NO_COLORS

/**
 * ANSI Escapes for Normal Colors.
*/
#define BLK(TEXT) "\x1b[30m"TEXT"\x1b[0m"
#define RED(TEXT) "\x1b[31m"TEXT"\x1b[0m"