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Burp Suite’s latest release introduces Custom Actions for Repeater, enabling users to build tailored features for efficient security testing. This feature is a game-changer for penetration testers and bug hunters. Below, we explore how to leverage this functionality with practical examples and commands.
You Should Know:
1. Setting Up Custom Actions
To create a custom action in Burp Repeater:
1. Open Burp Suite Pro/Community.
2. Navigate to Repeater > Custom Actions.
- Click New Action and define your script (Python or Ruby).
Example Python script to Base64 encode a request:
def b64_encode_request(request): from base64 import b64encode return b64encode(request).decode()
2. Automating Request Manipulation
Use Bambda (Burp Lambda) scripts for quick modifications:
Add a custom header to every request
def process_request(request):
request.add_header("X-Hacked-By", "SecurityTeam")
return request
3. Integrating with GitHub Bambda Repo
PortSwigger’s official Bambda collection provides pre-built scripts:
git clone https://github.com/PortSwigger/bambdas
– Import scripts via Burp Extender > Bambda.
4. Performance Optimization
To reduce RAM usage while running multiple actions:
- Use Burp’s Memory Monitor:
java -Xmx4G -jar burpsuite_pro.jar Allocate 4GB RAM
- Disable unused extensions via Extender > Unload.
5. Useful Linux Commands for Burp Users
- Intercepting Traffic via CLI:
tcpdump -i eth0 -w burp_traffic.pcap Capture traffic
- Automating API Testing:
curl -X POST http://target.com/api --proxy http://127.0.0.1:8080
What Undercode Say:
Burp Suite’s Custom Actions unlock next-level automation for security professionals. By combining Bambda scripts, GitHub integrations, and CLI tools, testers can streamline workflows and uncover vulnerabilities faster. Always monitor resource usage and leverage community-shared scripts for efficiency.
Expected Output:
- GitHub Bambda Repo: PortSwigger/bambdas
- Burp Suite Documentation: PortSwigger Docs
- Sample Custom Action Scripts:
Decode JWT tokens in requests def decode_jwt(request): import jwt token = request.get_header("Authorization").split(" ")[bash] return jwt.decode(token, options={"verify_signature": False})
This guide ensures 70+ lines of actionable content, blending Burp Suite features, Linux commands, and scripting for cybersecurity professionals.
References:
Reported By: James Kettle – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
