EdOverflow/hacks: The Art of Disposable Security Scripts in /usr/local/bin

Hook

While the cybersecurity industry obsesses over Kubernetes-deployed scanning platforms, some of the most effective bug bounty hunters still rely on 50-line shell scripts dropped directly into /usr/local/bin. EdOverflow's 'hacks' repository is a masterclass in this forgotten art.

Context

The modern security tooling ecosystem has become bloated. Install a reconnaissance tool today and you're likely pulling down Python virtual environments, npm packages, Go binaries, Docker images, and configuration files scattered across your filesystem. You need package managers, dependency resolvers, and often root privileges just to scan a subdomain.

EdOverflow's 'hacks' repository takes the opposite approach: a collection of standalone shell scripts designed to be copied directly into your PATH. No installation ceremonies, no dependency hell, no framework lock-in. Each script is a self-contained utility that does exactly one thing—whether that's extracting URLs from web archives, parsing certificate transparency logs, or automating reconnaissance workflows. This philosophy harks back to the Unix tradition of small, composable tools, but applies it specifically to the fast-paced world of bug bounty hunting where you need to spin up a quick test, grab some data, and move on. The repository's self-deprecating description—'Just trying to be like the cool kids'—belies its pragmatic value for security researchers who prioritize velocity over enterprise features.

Technical Insight

The architecture of this repository is anti-architecture by design. There's no framework, no shared libraries, no module system. Each script is a complete, independent program that you can understand by reading from top to bottom. This design decision has profound implications for usability in security contexts.

Consider how you'd typically install these tools. Instead of pip install or npm install -g, you literally just copy scripts to /usr/local/bin and make them executable:

git clone https://github.com/EdOverflow/hacks.git
cd hacks
sudo cp script-name.sh /usr/local/bin/script-name
sudo chmod +x /usr/local/bin/script-name

This manual installation approach seems primitive until you consider the operational context. Bug bounty hunters often work across multiple environments—their local machine, a VPS for heavy scanning, a colleague's server for a specific task. Being able to curl a single script and have it working immediately is genuinely valuable. There's no state to manage, no virtual environments to activate, no configuration files in hidden directories that break when you switch contexts.

The scripts themselves follow consistent patterns. They're written in POSIX-compatible shell script, meaning they'll run on bash, zsh, dash, and most Unix-like systems without modification. The repository enforces ShellCheck validation through its contribution guidelines, which catches common portability issues, quoting problems, and unsafe practices. This matters more than you might think—a script that works on your macOS laptop but fails on a Ubuntu VPS is worse than useless during a time-sensitive engagement.

Look at the typical structure of these utilities. They rely on standard Unix tools that are virtually guaranteed to be present: curl, grep, awk, sed, jq for JSON parsing. Here's a representative example of the coding style you'd find:

#!/bin/bash
# Extract all URLs from Wayback Machine for a domain

if [ -z "$1" ]; then
    echo "Usage: waybackurls <domain>"
    exit 1
fi

domain="$1"

curl -s "http://web.archive.org/cdx/search/cdx?url=*.$domain/*&output=text&fl=original&collapse=urlkey" \
    | sort -u \
    | grep -E "^https?://" \
    | grep -v -E "\.(jpg|jpeg|png|gif|css|js|ico|woff|ttf)$"

This 15-line script does something genuinely useful: it queries the Internet Archive's Wayback Machine API, extracts unique URLs, filters out static assets, and outputs results you can pipe to other tools. The error handling is minimal but sufficient. The dependencies are just curl, sort, and grep—tools that have been stable for decades.

The real power emerges when you compose these scripts together in shell pipelines. This is where the Unix philosophy shines:

waybackurls target.com | grep -E "(api|admin|login)" | httpx -status-code -title

You're chaining three separate tools—one from this repository, standard grep, and httpx (another common security utility)—to find interesting endpoints from archived URLs and probe which ones are still alive. Each tool is ignorant of the others; they just read from stdin and write to stdout. This composability is harder to achieve with frameworks that want to own the entire workflow.

The repository also serves as an educational resource for security-focused shell scripting. Each script demonstrates practical patterns: how to parse command-line arguments, how to handle API rate limits with sleep, how to use jq for JSON parsing in ways that don't break on malformed input, how to parallelize operations with xargs -P. For developers transitioning from web development to security research, these scripts are templates you can cargo-cult and adapt to your specific needs.

Gotcha

The limitations are substantial and by design. There's no package manager, which means updates require manually checking the repository and replacing files. If a script breaks due to an API change (a common occurrence with reconnaissance tools that depend on third-party services), you need to monitor the repository yourself or simply accept that the tool stopped working.

Documentation is minimal to nonexistent. Most scripts have a basic usage check if you run them without arguments, but there's no man pages, no detailed examples, no explanation of edge cases. You learn what a script does by reading its source code—which is both a feature and a bug. For experienced developers, reading 50 lines of shell script is faster than parsing framework documentation. For beginners or when you need to use the script six months later, the lack of comments and examples is frustrating.

The single-file architecture also means code reuse happens through copy-paste, not through shared libraries. If five scripts need to parse command-line options the same way, that logic is duplicated five times. This makes maintenance harder—a bug fix in one script's argument parsing doesn't automatically propagate to others. The trade-off is that each script remains self-contained and can be copied independently, but you're definitely sacrificing DRY principles.

Error handling and edge case coverage is minimal. These scripts are designed for quick-and-dirty reconnaissance by someone who understands security workflows, not for production deployments or non-technical users. If an API returns unexpected JSON structure, the script might fail silently or produce garbage output. There's no logging, no retry logic, no graceful degradation. You're expected to understand what broke and fix it yourself.

Verdict

Use if: You're a bug bounty hunter, penetration tester, or security researcher who values velocity over polish and wants minimal, customizable utilities you can deploy instantly across different environments. Use if you're comfortable reading shell scripts to understand functionality and debugging when things break. Use if you appreciate the Unix philosophy of small, composable tools and want educational examples of security-focused shell scripting patterns. Use if you need something you can quickly fork, modify for your specific workflow, and maintain independently.

Skip if: You need production-grade tooling with proper versioning, update mechanisms, and support channels. Skip if you want comprehensive documentation and examples rather than learning by reading code. Skip if you're looking for a complete security framework rather than individual utilities. Skip if you're uncomfortable with the manual installation process or want tools that integrate with modern package managers. Skip if you need robust error handling, logging, or features beyond quick reconnaissance tasks. For those use cases, look at established platforms like Kali Linux's tool collection, OWASP Amass for professional reconnaissance, or Metasploit Framework for comprehensive penetration testing capabilities.