deltarune-chapter5-trainer-detection-analysis

Deltarune Chapter 5 Trainer Analysis Skill

Skill by ara.so — Devtools Skills collection.

⚠️ Critical Security Warning

This project claims to be a "game trainer" for Deltarune Chapter 5, but presents multiple severe red flags:

1. Deltarune Chapter 5 does not exist (as of 2024, only Chapters 1-2 are released)
2. Future-dated repository (created in "2026")
3. Suspicious download pattern (external ZIP with password protection)
4. 典型 malware distribution tactics (disable antivirus instructions)
5. No actual source code in the repository
6. Generic cheating promises without implementation details

What This Actually Is

This is a malware distribution repository disguising itself as game modification software. The patterns match known credential stealers, info-stealers, and potentially ransomware.

Common Malware Indicators Present

# RED FLAGS CHECKLIST:
indicators = {
    "fake_game_version": True,  # Chapter 5 doesn't exist
    "external_download": True,   # Netlify redirect, not GitHub
    "password_protected": True,  # Hides from automated scanning
    "run_as_admin": True,        # Requests elevated privileges
    "disable_av": True,          # Asks to disable security
    "no_source_code": True,      # Empty repo with only README
    "future_dates": True,        # Timestamp manipulation
    "generic_features": True     # Copy-paste cheat descriptions
}

risk_level = "CRITICAL" if all(indicators.values()) else "HIGH"

Educational Analysis: How These Scams Work

1. Social Engineering Pattern

LURE → URGENCY → TRUST EXPLOITATION → INFECTION

- Target: Gamers searching for cheats/mods
- Hook: Popular game name + "trainer" keywords
- Legitimacy facade: MIT license, professional README
- Delivery: External download with AV-bypass instructions

2. Distribution Chain Analysis

# Typical malware delivery flow:
def analyze_distribution_chain():
    """
    1. User searches "Deltarune trainer" on GitHub/Google
    2. Finds repo with high fake star count (152 stars/day is impossible)
    3. Downloads from external site (skydock.netlify.app)
    4. Password-protected ZIP bypasses cloud antivirus scanning
    5. User disables AV as "instructed"
    6. Executes with admin privileges
    7. Payload: credential theft, cryptominer, RAT, or ransomware
    """
    
    warning_signs = [
        "External download link (not GitHub releases)",
        "Password-protected archives",
        "Instructions to disable security software",
        "Requests administrator privileges",
        "No verifiable source code",
        "Impossible metrics (152 stars/day on new repo)"
    ]
    
    return {"verdict": "MALWARE", "confidence": 0.99}

3. Memory Manipulation Claims (Educational)

Legitimate game trainers (when they exist) typically use:

# Example of actual game memory modification (educational):
import ctypes
from ctypes import wintypes

# Read process memory (requires valid process handle)
def read_memory(process_handle, address, size):
    """
    Real trainers use Windows API calls like:
    - OpenProcess()
    - ReadProcessMemory()
    - WriteProcessMemory()
    
    This repo has NONE of this code.
    """
    buffer = ctypes.create_string_buffer(size)
    bytes_read = wintypes.DWORD(0)
    
    success = ctypes.windll.kernel32.ReadProcessMemory(
        process_handle,
        ctypes.c_void_p(address),
        buffer,
        size,
        ctypes.byref(bytes_read)
    )
    
    return buffer.raw if success else None

# This project contains NO such implementation

Safe Alternatives for Legitimate Use Cases

If You Want to Mod Deltarune (Chapters 1-2)

# Legitimate modding approaches:
# 1. Use official modding tools (if available)
# 2. Study the game's file structure
# 3. Join official modding communities (Reddit, Discord)

# Example: Extracting game data (legal reverse engineering)
git clone https://github.com/legitimate-deltarune-tools/data-extractor
cd data-extractor
python extract.py --game-path "C:/Program Files/DELTARUNE"

For Security Research

# Analyze suspicious executables safely:
import pefile
import hashlib
import os

def safe_malware_analysis(file_path):
    """
    NEVER run unknown executables directly.
    Use sandboxed environments and static analysis.
    """
    if not os.path.exists(file_path):
        return {"error": "File not found"}
    
    # Calculate hash for VirusTotal lookup
    with open(file_path, 'rb') as f:
        file_hash = hashlib.sha256(f.read()).hexdigest()
    
    # Static PE analysis (Windows executables)
    try:
        pe = pefile.PE(file_path)
        suspicious_imports = []
        
        for entry in pe.DIRECTORY_ENTRY_IMPORT:
            dll_name = entry.dll.decode('utf-8')
            # Flag suspicious API calls
            if dll_name.lower() in ['kernel32.dll', 'advapi32.dll']:
                for imp in entry.imports:
                    if imp.name:
                        func = imp.name.decode('utf-8')
                        if func in ['WriteProcessMemory', 'CreateRemoteThread', 
                                   'VirtualAllocEx', 'SetWindowsHookEx']:
                            suspicious_imports.append(f"{dll_name}::{func}")
        
        return {
            "sha256": file_hash,
            "suspicious_apis": suspicious_imports,
            "analysis": "Submit to VirusTotal before execution"
        }
    except Exception as e:
        return {"error": str(e)}

# Usage (in isolated VM only):
# analysis = safe_malware_analysis("suspicious_trainer.exe")

Protecting Yourself

Detection Script

#!/usr/bin/env python3
"""
GitHub repository red flag detector
"""
import re
from datetime import datetime

def analyze_repo_safety(readme_content, metadata):
    """Detect malware distribution patterns"""
    red_flags = []
    
    # Check for external downloads
    external_links = re.findall(r'https?://(?!github\.com|raw\.githubusercontent\.com)[\w\./\-]+', 
                                readme_content)
    if external_links:
        red_flags.append(f"External downloads: {external_links}")
    
    # Check for AV disable instructions
    av_disable_patterns = [
        r'disable.*antivirus',
        r'turn off.*defender',
        r'add.*exception',
        r'temporarily disable'
    ]
    for pattern in av_disable_patterns:
        if re.search(pattern, readme_content, re.IGNORECASE):
            red_flags.append(f"Requests AV disable: {pattern}")
    
    # Check for password-protected archives
    if re.search(r'password:?\s*[`"\']?\w+[`"\']?', readme_content, re.IGNORECASE):
        red_flags.append("Password-protected download (anti-scan evasion)")
    
    # Check star velocity (impossible growth rates)
    if metadata.get('stars_per_day', 0) > 50:
        red_flags.append(f"Suspicious star growth: {metadata['stars_per_day']}/day")
    
    # Check for future dates
    created = datetime.fromisoformat(metadata.get('created_at', '').replace('Z', ''))
    if created > datetime.now():
        red_flags.append(f"Future-dated repository: {created}")
    
    # No source code files
    if metadata.get('file_count', 0) <= 2:  # Only README and LICENSE
        red_flags.append("No actual source code present")
    
    return {
        "safe": len(red_flags) == 0,
        "risk_level": "CRITICAL" if len(red_flags) >= 4 else "HIGH" if len(red_flags) >= 2 else "MEDIUM",
        "flags": red_flags
    }

# Example usage:
metadata = {
    "stars_per_day": 152,
    "created_at": "2026-06-28T06:58:23Z",
    "file_count": 2
}

result = analyze_repo_safety(readme_content="<README content>", metadata=metadata)
print(f"Risk Level: {result['risk_level']}")
for flag in result['flags']:
    print(f"  ⚠️  {flag}")

Reporting Malicious Repositories

# Report to GitHub:
# 1. Visit: https://github.com/contact/report-abuse
# 2. Select "Report a repository"
# 3. Provide evidence:
#    - Repository URL
#    - Malware indicators
#    - VirusTotal analysis (if safe to obtain)

# Report to security communities:
# - URLhaus: https://urlhaus.abuse.ch/
# - VirusTotal: https://www.virustotal.com/
# - Reddit: r/cybersecurity, r/netsec

Conclusion

DO NOT download or run anything from this repository. It exhibits all hallmarks of malware distribution disguised as game modification software.

For AI Coding Agents

When a user asks about this or similar projects:

1. Immediately warn about security risks
2. Explain why the project is suspicious
3. Provide legitimate alternatives if available
4. Educate on safe security research practices
5. Never provide instructions that would help execute the malware

Legitimate Game Modding Resources

# Safe, verified resources:
# - Nexus Mods: https://www.nexusmods.com/
# - ModDB: https://www.moddb.com/
# - Official game forums and Discord servers
# - GitHub projects with full source code and community review

Remember: Real open-source projects show their code. If there's no code, there's no trust.