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CyberDudeBivash • Threat Hunting Engineering

CyberDudeBivash Threat Hunting Script
Python Utility for Real-Time SOC Defense

By Cyberdudebivash • Updated 2025

cyberdudebivash.com | cyberbivash.blogspot.com

Threat hunting is no longer optional. Modern attackers routinely bypass signature-based security controls and remain undetected for weeks or months. The difference between a minor security incident and a catastrophic breach often comes down to one thing: proactive threat hunting.

This post introduces the CyberDudeBivash Threat Hunting Script — a Python-based defensive utility designed to help SOC teams, blue teamers, and security engineers hunt suspicious activity in real time using practical, explainable logic.

This is not malware. This is not offensive tooling. This is a defender-grade utility built for visibility, context, and safe response.

TL;DR

Threat hunting focuses on unknown and stealthy attacks.
The CyberDudeBivash Threat Hunting Script uses Python for portability and automation.
It monitors high-signal system behaviors and scores risk.
Output is SOC-ready JSON for SIEM ingestion.
Designed for alert-first, safe-by-default operations.

What Is Threat Hunting?
Why SOCs Need Custom Hunting Scripts
CyberDudeBivash Threat Hunting Philosophy
Threat Hunting Script Architecture
Python Threat Hunting Script (Full Code)
Real-Time Usage in SOC Environments
SIEM Integration (Splunk / Elastic)
Hardening and Safety Controls
Operational Use Cases
Conclusion

1) What Is Threat Hunting?

Threat hunting is a proactive security discipline focused on identifying adversaries that have already bypassed preventive controls. Unlike traditional alert-driven SOC workflows, threat hunting starts with hypotheses:

“What if an attacker is abusing PowerShell for lateral movement?”
“What if malware is running from user-writable directories?”
“What if credentials are being abused silently?”

Threat hunting scripts automate the boring parts of this process and surface high-risk anomalies that deserve human investigation.

2) Why SOCs Need Custom Hunting Scripts

Commercial EDR and SIEM tools are powerful, but they are not tailored to your environment by default. Custom threat hunting scripts allow you to:

Focus on behaviors specific to your organization
Reduce alert noise
Test new detection ideas quickly
Automate enrichment and scoring
Build detection engineering maturity

The CyberDudeBivash approach treats scripts as defensive sensors, not weapons.

3) CyberDudeBivash Threat Hunting Philosophy

Alert-first: No destructive actions by default
Explainable: Every alert includes rationale
Portable: Runs on Windows and Linux
SOC-ready: JSON output for SIEM ingestion
Safe-by-design: No execution of untrusted files

Threat hunting should empower analysts, not replace them.

4) Threat Hunting Script Architecture

Collector: Reads process and system signals
Analyzer: Applies hunting logic and heuristics
Scorer: Assigns risk score
Emitter: Writes structured events
Exporter: Ships data to SIEM

This modular design allows safe expansion without breaking production systems.

5) CyberDudeBivash Threat Hunting Script (Python)

# CyberDudeBivash Threat Hunting Script
# Defensive • Alert-First • SOC-Ready

import psutil
import time
import json
import socket
import hashlib

OUTPUT_FILE = "cyberdudebivash_threat_hunt.jsonl"

def host():
    return socket.gethostname()

def now():
    return int(time.time())

def hash_text(txt):
    return hashlib.sha256(txt.encode()).hexdigest()

def score_process(proc):
    score = 0
    reasons = []

    exe = (proc.get("exe") or "").lower()
    cmd = (proc.get("cmdline") or "").lower()
    parent = (proc.get("parent") or "").lower()

    if "/tmp/" in exe or "\\appdata\\" in exe:
        score += 20
        reasons.append("execution_from_user_writable_path")

    if "powershell" in cmd and ("-enc" in cmd or "encodedcommand" in cmd):
        score += 30
        reasons.append("encoded_powershell")

    if parent in ["winword.exe", "excel.exe"] and "powershell" in cmd:
        score += 40
        reasons.append("office_spawned_powershell")

    return score, reasons

def emit(event):
    with open(OUTPUT_FILE, "a") as f:
        f.write(json.dumps(event) + "\n")

def hunt():
    seen = set()
    while True:
        for p in psutil.process_iter(attrs=["pid","name","exe","cmdline","ppid"]):
            try:
                cmdline = " ".join(p.info.get("cmdline") or [])
                fingerprint = hash_text(f"{p.pid}|{cmdline}")
                if fingerprint in seen:
                    continue
                seen.add(fingerprint)

                score, reasons = score_process({
                    "exe": p.info.get("exe"),
                    "cmdline": cmdline,
                    "parent": psutil.Process(p.info["ppid"]).name() if p.info["ppid"] else ""
                })

                if score >= 40:
                    emit({
                        "timestamp": now(),
                        "host": host(),
                        "event": "suspicious_process",
                        "process": p.info.get("name"),
                        "cmdline": cmdline,
                        "score": score,
                        "reasons": reasons
                    })
            except Exception:
                continue
        time.sleep(5)

if __name__ == "__main__":
    hunt()

This script continuously monitors running processes and generates high-confidence threat hunting alerts based on behavior, not signatures.

6) Real-Time Usage in SOC Environments

In real SOC deployments, this script typically runs as:

A background service on endpoints
A jump-host monitoring agent
A controlled lab hunting sensor

Output is forwarded to SIEM platforms such as Splunk or Elastic for correlation with network, authentication, and cloud telemetry.

7) SIEM Integration (Splunk / Elastic)

The JSON output can be ingested directly via:

Splunk Universal Forwarder or HEC
Elastic Filebeat
Custom SOC pipelines

Each event includes timestamp, host, score, and rationale — enabling powerful correlation and investigation.

8) Hardening and Safety Controls

Run with least privilege
Alert-only default mode
Immutable log forwarding
Policy-based scoring thresholds
Kill-switch support

9) Conclusion

The CyberDudeBivash Threat Hunting Script demonstrates how small, well-designed Python utilities can dramatically improve SOC visibility and response speed.

Threat hunting is a mindset — tools like this simply make it scalable.

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