---
license: apache-2.0
base_model: unsloth/Qwen3-1.7B-unsloth-bnb-4bit
language:
- en
tags:
- cybersecurity
- soc-triage
- threat-detection
- qlora
- peft
- qwen3
pipeline_tag: text-generation
library_name: peft
---

# ThreatQwen-1.7B-Detect

A QLoRA fine-tune of **Qwen3-1.7B-Instruct** for cybersecurity event triage. Given a raw security event (Sysmon, CloudTrail, HTTP log, etc.), the model returns a structured JSON verdict.

## Results

Evaluated on a balanced held-out test set of **882 samples (441 malicious + 441 benign)**:

| Model | Accuracy | Mal. Recall | Ben. Recall | Macro F1 |
|---|---|---|---|---|
| **ThreatQwen-1.7B-Detect (ours)** | **95.1%** | **96.1%** | **94.2%** | **0.951** |
| Base Qwen3-1.7B (no fine-tune) | 85.1% | 92.1% | 78.2% | 0.851 |
| GPT-4o (Azure, zero-shot) | 51.8% | 85.0% | 18.6% | 0.458 |
| GPT-4o-mini (Azure, zero-shot) | 51.9% | 59.6% | 44.2% | 0.516 |

Fine-tuning improves the base model by **+10 percentage points** and outperforms GPT-4o by **+43.3 percentage points**.

## Output Schema

```json
{"verdict": "malicious | benign"}
```

## Training

| Parameter | Value |
|---|---|
| Base model | unsloth/Qwen3-1.7B-unsloth-bnb-4bit |
| Method | QLoRA 4-bit NF4 |
| LoRA rank / alpha | 16 / 32 |
| Epochs | 3 |
| Effective batch size | 16 (batch 4 × accum 4) |
| Learning rate | 2e-4 cosine |
| MAX_SEQ_LEN | 512 |
| Hardware | Tesla T4 (Kaggle free tier) |
| Training time | ~10 min |

## Dataset

Combines SigmaHQ, Elastic Detection Rules, and Nuclei templates (~5,823 real malicious events) with GPT-4o-generated synthetic benign examples (~3,743 benign covering Windows, web, email, database, VPN/remote-access). Full dataset: [minar-svn/ThreatQwen-detection-dataset](https://huggingface.co/datasets/minar-svn/ThreatQwen-detection-dataset)

## Deployment

- Fully offline — no internet required (air-gapped SOC capable)
- ~3.1 GB VRAM (4-bit quantized)
- ~18 tokens/sec on Tesla T4
- ~5–7 sec/event latency
- Adapter: ~434 MB
- Min GPU: RTX 3060 (8 GB)

## Usage

```python
from transformers import AutoModelForCausalLM, AutoTokenizer
from peft import PeftModel
import torch, json

base = AutoModelForCausalLM.from_pretrained(
    "unsloth/Qwen3-1.7B-unsloth-bnb-4bit",
    torch_dtype=torch.float16, device_map="auto",
)
model     = PeftModel.from_pretrained(base, "minar-svn/ThreatQwen-1.7B-Detect")
tokenizer = AutoTokenizer.from_pretrained("minar-svn/ThreatQwen-1.7B-Detect")

SYSTEM = 'You are a cybersecurity detection model. Respond ONLY with valid JSON. Format: {"verdict": "malicious | benign"}'

event = "EventID: 1 Image: rundll32.exe CommandLine: comsvcs.dll MiniDump User: admin"

msgs   = [{"role":"system","content":SYSTEM},{"role":"user","content":f"Analyze:\n\n{event}"}]
prompt = tokenizer.apply_chat_template(msgs, tokenize=False, add_generation_prompt=True).strip()
inputs = tokenizer(prompt, return_tensors="pt").to(model.device)

with torch.no_grad():
    out = model.generate(**inputs, max_new_tokens=40, do_sample=False,
                         pad_token_id=tokenizer.eos_token_id)

response = tokenizer.decode(out[0][inputs["input_ids"].shape[1]:], skip_special_tokens=True).strip()
blocks   = [b.strip() for b in response.split("\n\n") if b.strip()]
print(json.loads(blocks[-1]))
# {"verdict": "malicious"}
```

## Limitations

- All benign test examples are synthetic — real-world benign generalization untested
- English only
- Analyst aid only — not a sole decision authority

## Citation

```bibtex
@misc{threatqwen2026,
  author    = {Md. Minaruzzaman Shovon},
  title     = {ThreatQwen-1.7B-Detect},
  year      = {2026},
  publisher = {Hugging Face},
  url       = {https://huggingface.co/minar-svn/ThreatQwen-1.7B-Detect}
}
```

## License
Apache 2.0