HTTP traffic index engine

• design and implement an HTTP request hash algorithm to filter similar HTTP request(from penetration testing perspective)
• design and implement a web page structural clustering algorithm to filter similar web page(from penetration testing perspective)
• design and implement a crawler-based on these two algorithms to index HTTP traffic

web attack detection using Machine Learning

• collect web attack payloads, including SQL injection payloads, XSS payloads, command injection payloads, XXE payloads, some other RCE payloads like s2-045, and normal HTTP traffic
• test multiple different Machine Learning classification algorithms' false-positive rate and false-negative rate, implemented the most efficient and acceptable model

high-frequency futures trading bot

• implement order imbalance algorithm
• test on multiple futures instruments, some work, some not
• working on implementing high market access

leetcode problem Python solutions

• many leetcode problems' Python solutions

LD_PRELOAD based user-space educational Linux rootkit

• can hide file, process, user
• supports both 32-bit and 64-bit system calls
• works on all distributions
• works on all kernel versions(since it is user-space, no need to worry about kernel versions)
• cons: does not work for statically linked binaries

captcha solver using Deep Learning(based on LSTM and CTC loss)

• tried years to do this using traditional computer vision algorithms, well, results were not good
• after deep learning evolved to a more mature stage and CTC loss was introduced, solved it in no time

Python source code obfuscation tool

• parse abstract syntax tree(it is very easy to do this in Python)
• manipulate tree node, like, split a meaningful string to multiple meaningless numbers, add no-op code, etc

multiple POCs

• multiple struts2 RCE pocs
• solr RCE poc

fast and secure file transfer tool in a high packet loss environment

• password protected upload point
• segment file into chunks
• multi-thread transfer
• packet timeout and re-transfer

gnome desktop environment init tool

• convenient and flexible
• run commands in gnome-terminal
• Chrome, telegram, nautilus, atom, calibre, bitwarden
• some GUI automation helpers

quantitative trading utils

• time and time range utils
• plot volume and price
• load,clean,transform tick data
• sample history data

Python script "compile" tool

• "compile" a script to a one-file binary using pyinstaller
• clean up intermediate files

youtube music library no-copyright-music downloader

• parse youtube music library web page and API request
• extract no-copyright-music URLs
• download and save to files

others

• tmux session init tool
• cloudflare nodes latency test and record tool
• videos to music converting tool
• PE(portable executable) analysis tool
• v2ray config generation tool
• Internet speed test and record tool
• backup automation tool
• time series data animation tool
• markdown to pdf automation tool
• GPA calculation tool
• video process automation tool