Challenge list
LinuxLevel 3★★★☆☆Linux-Race Condition. Exploiting a TOCTOU Gap for Root Files
A cleanup script that root runs periodically has a gap (TOCTOU) between checking and acting on a file. Try exploiting…
General SkillsLevel 3★★★☆☆Python Automation - REST API Data Collection
A paginated local API runs in the container at `http://127.0.0.1:8000/api/records?page=N`. Walk every page until…
General SkillsLevel 3★★★☆☆SQL Query Master - Complex Joins
The SQLite database `/challenge/company.db` has 3 tables: - employees (id, name, department_id, salary, email, note) -…
General SkillsLevel 3★★★☆☆System Call Tracing - strace Debugging
Analyze `/challenge/strace.log`, a strace recording of the source-less program `/app/mystery_program`. The program…
General SkillsLevel 3★★★☆☆System Log Analysis - journalctl Master
Analyze `/challenge/system.log`, a systemd journal exported in `journalctl -o short` style. Each line reads "timestamp…
General SkillsLevel 3★★★☆☆Network Master - Netcat Reverse Shell
Analyze the prerecorded artifacts/netcat/callback-transcript.log without connecting to any external host; no listener…
General SkillsLevel 3★★★☆☆Performance Analysis - Find the Resource Hog
Analyze the server snapshot `/challenge/metrics.log`. The first half is a top-style process table (%CPU is column 9,…
General SkillsLevel 3★★★☆☆Regex Expert - Data Validation
/challenge/data.txt holds 400 contact records. Each line contains an email address, a phone number, an IP address and…
General SkillsLevel 3★★★☆☆Advanced Automation - Directory Monitor
`/challenge/logs/` holds access logs from four web front ends (combined log format, 60 files, over 100k lines). The…
General SkillsLevel 4★★★★☆AWS CLI - S3 Bucket Investigation
An offline export of the S3 configuration is under `/challenge/s3_audit/` (`buckets.json` plus each bucket's…
General SkillsLevel 4★★★★☆Ansible Automation - Server Configuration Management
Analyze the generated run export artifacts/ansible/vault-export.yml without running Ansible or touching a server. It…
General SkillsLevel 4★★★★☆CI/CD Security - GitHub Actions Vulnerability
Audit the 20 GitHub Actions workflows under `/challenge/repo/.github/workflows/`. Many steps carry a `# audit-ticket:…
General SkillsLevel 4★★★★☆Infrastructure as Code - Terraform Security
Analyze the generated terraform/terraform.tfstate without initializing a Terraform provider. The output…
General SkillsLevel 4★★★★☆Kubernetes Basics - Cluster Investigation
Investigate the two snapshots in artifacts/kubernetes/ (pod-snapshot.yaml and secret-snapshot.yaml) without connecting…
LinuxLevel 4★★★★☆Linux-Kernel Module. Gaining Root via a Vulnerable Driver
This challenge analyzes a vulnerable character-device driver as a safe user-space simulation. No real kernel module is…
LinuxLevel 4★★★★☆Linux-Buffer Overflow. Exploiting a gets() Vulnerability
A vulnerable SUID C binary with protections disabled is provided. Exploit its buffer overflow to redirect control flow…
General SkillsLevel 4★★★★☆Custom Tool Development - Web Directory Scanner
Analyze the locally generated artifacts/scanner/directory-report.ndjson instead of scanning a live website. The…
General SkillsLevel 4★★★★☆Network Tunneling - SSH Port Forwarding
Practice SSH local port forwarding inside one container. SSH listens on 127.0.0.1:22 and the internal service uses…
General SkillsLevel 4★★★★☆Encrypted Communication - GPG Public Key Cryptography
Practice GnuPG decryption. Import every private key under `/challenge/keys/` and decrypt each ciphertext under…
General SkillsLevel 4★★★★☆Vulnerability Scanning - Advanced Nmap NSE
The results of running `nmap -sV -sC --script vuln` against the internal subnet `10.66.13.0/24` are in…
General SkillsLevel 4★★★★☆Static Analysis - Code Vulnerability Scanning
The Python source of an internal notes app is in `/challenge/src/`. The nine lines flagged by an earlier…
General SkillsLevel 5★★★★★APT Simulation - Full Breach Scenario
This is not an attack exercise but a blue-team task of reading the logs of an incident that already happened. From the…
General SkillsLevel 5★★★★★Bug Bounty Practice - Vulnerability Discovery Master
Analyze the fixed artifacts/bug-bounty/triage-report.json instead of testing a live application. A chained report has…
LinuxLevel 5★★★★★Linux-eBPF Rootkit. Unmasking a Hidden Process
This challenge safely recreates eBPF-rootkit investigation as offline evidence analysis. Without loading eBPF, tell…