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ctf-malware

Analyze obfuscated malware and decrypt C2 traffic for CTF challenges.

96|1|Updated Jun 4, 2026
Search Tags:#ctf#reverse engineering#yara#malware analysis#memory forensics#c2 traffic#pe analysis
One-click install
npx skills add https://github.com/langbyyi/CyberStrikeAI-SRC --skill ctf-malware-langbyyi
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: ctf-malware
Source: https://github.com/langbyyi/CyberStrikeAI-SRC/tree/main/skills/ctf-malware
Command: npx skills add https://github.com/langbyyi/CyberStrikeAI-SRC --skill ctf-malware-langbyyi

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill eliminates the steep learning curve and time-consuming manual work of analyzing obfuscated malware, reverse engineering binaries, and decrypting command-and-control traffic during capture-the-flag competitions, which typically requires deep specialized knowledge across multiple security domains.

Core Features & Use Cases

  • Malware Static & Dynamic Analysis: Analyze PE/.NET binaries, obfuscated scripts, shellcode, and perform memory forensics to extract indicators of compromise and malicious configurations.
  • C2 Traffic Decryption: Decrypt custom crypto protocols, RC4/AES encrypted communications, and analyze C2 traffic patterns from PCAP files to recover exfiltrated data and attacker infrastructure.
  • Anti-Analysis Bypass: Detect and bypass VM/sandbox detection, API hashing, timing evasion, and process injection techniques used to hide malicious functionality in CTF challenges.
  • Use Case: For a CTF challenge with an obfuscated PowerShell malware sample that communicates with a C2 server over RC4-encrypted WebSocket, use this skill to deobfuscate the script, extract the RC4 key from the binary, decrypt the traffic, and retrieve the flag.

Quick Start

Use the ctf-malware skill to analyze the provided obfuscated malware sample, extract its C2 configuration, and decrypt the associated PCAP network traffic to retrieve the CTF flag.

Frequently Asked Questions about ctf-malware

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I decrypt C2 traffic from a PCAP file in a CTF challenge?▼

To decrypt C2 traffic from a PCAP file, you must first extract the encryption keys from the malware sample. You can then analyze the network traffic patterns and apply the extracted keys to decrypt RC4 or AES encrypted communications and recover exfiltrated data.

What is the best way to analyze obfuscated PowerShell malware and extract its configuration?▼

Analyzing obfuscated PowerShell malware involves script deobfuscation to reveal the underlying logic. You perform static and dynamic analysis to identify malicious configurations, bypass anti-analysis techniques, and extract embedded indicators of compromise.

How does memory forensics help with reverse engineering shellcode?▼

Memory forensics helps reverse engineer shellcode by analyzing the runtime memory state of a compromised process. This allows you to bypass API hashing and process injection techniques, revealing the decrypted payload and its execution flow in system memory.

Can I bypass sandbox detection and API hashing when analyzing PE binaries?▼

Yes, you can bypass sandbox detection and API hashing during PE binary analysis by identifying the evasion checks within the binary's logic. This allows you to patch the detection routines or simulate the expected environment to trigger the hidden malicious functionality.

How do I extract an RC4 key from a .NET binary to decrypt network traffic?▼

To extract an RC4 key from a .NET binary, you reverse engineer the compiled assembly to locate the key initialization routines. Once the key is recovered from the binary's configuration, you apply it to decrypt the associated RC4-encrypted C2 network traffic.

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