What are Violethat challenges?

Each challenge is a hands-on coding lab that targets a real detection-engineering or adversary-simulation skill. You write C or C++ in the browser-native IDE, a sandboxed agent compiles and runs your code against the target, and live agent telemetry streams stdout, stderr, hook traces, and verification results back to you over a WebSocket. When your implementation succeeds, the flag is surfaced automatically — no manual submission required.

Topics covered

• API hooking and inline detours
• Syscall instrumentation and tracing
• EDR detection and bypass research
• Malware analysis and reverse engineering
• Adversary simulation and red-team tradecraft
• AI security and adversarial ML
• Process injection and memory forensics

Who is this for?

Detection engineers, blue team analysts, malware researchers, security engineers, and operators who want to practice the techniques real attackers use — and write the detections that catch them — in a sandboxed environment built for the work, not the demo.

All challenges (4)

• A Simple Reverse Shell — easy — Topics: T1204.002 - User Execution: Malicious File

  During an internal investigation, a security team observes an application establishing an outbound connection and shortly afterward launching a command shell. T

• Borrowed Lineage — medium — Topics: T1134.004 - Parent PID Spoofing

  A threat actor has successfully executed malware on a compromised workstation but faces one remaining challenge-avoiding detection by endpoint security solution

• Back After Boot — easy — Topics: T1547.001 - Registry Run Keys / Startup Folder

  A detection engineer is analyzing activity from an endpoint where a suspicious program briefly modified the Windows Registry during execution. The change appear

• Inside the Target — hard — Topics: T1055.002 - Process Injection: Portable Executable Injection

  A workstation alert indicates suspicious behavior originating from a trusted application. Initial investigation shows no anomalies in the application's parent p