PEFT
Safetensors
English
cybersecurity
malware-analysis
att&ck
threat-intelligence
mixtral
lora
expert-adapters
cape-sandbox
digital-forensics
Instructions to use umer07/fathom-mixtral with libraries, inference providers, notebooks, and local apps. Follow these links to get started.
- Libraries
- PEFT
How to use umer07/fathom-mixtral with PEFT:
from peft import PeftModel from transformers import AutoModelForCausalLM base_model = AutoModelForCausalLM.from_pretrained("mistralai/Mixtral-8x7B-Instruct-v0.1") model = PeftModel.from_pretrained(base_model, "umer07/fathom-mixtral") - Notebooks
- Google Colab
- Kaggle
Rewrite model card: clean 2-table benchmark layout, full pipeline overview, critical notes
Browse files
README.md
CHANGED
|
@@ -17,10 +17,41 @@ pipeline_tag: text-generation
|
|
| 17 |
|
| 18 |
# Fathom β Cybersecurity Expert LLM
|
| 19 |
|
| 20 |
-
**Fathom** is a mixture-of-experts
|
| 21 |
|
| 22 |
-
> **
|
| 23 |
-
> **Inference format:** `[INST] {prompt} [/INST]`
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 24 |
|
| 25 |
---
|
| 26 |
|
|
@@ -28,136 +59,78 @@ pipeline_tag: text-generation
|
|
| 28 |
|
| 29 |
| Component | Details |
|
| 30 |
|-----------|---------|
|
| 31 |
-
| Base Model | Mixtral-8x7B-Instruct-v0.1 (MoE, 47B params, 8Γ7B experts) |
|
| 32 |
-
| Fine-tuning | LoRA
|
| 33 |
-
| Precision | BFloat16
|
| 34 |
-
| Training Hardware | AMD MI300X VF
|
| 35 |
-
| Framework | PEFT + TRL
|
| 36 |
-
| Prompt Format | Mixtral `[INST]...[/INST]` |
|
| 37 |
-
|
|
| 38 |
-
|
|
|
|
|
| 39 |
|
| 40 |
---
|
| 41 |
|
| 42 |
## Adapters
|
| 43 |
|
| 44 |
-
| Adapter | Domain |
|
| 45 |
-
|---------|--------|---------------
|
| 46 |
-
| `unified-v2` *(
|
| 47 |
-
| `adapters/expert-e1-static` | Static Analysis | 36,160 | PE
|
| 48 |
-
| `adapters/expert-e2-dynamic` | Dynamic / Behavioral | 2,713 |
|
| 49 |
-
| `adapters/expert-e3-network` | Network Analysis | 19,991 | C2
|
| 50 |
-
| `adapters/expert-e4-forensics` | Digital Forensics | 19,183 | Memory forensics,
|
| 51 |
-
| `adapters/expert-e5-threatintel` | Threat Intelligence | 9,532 |
|
| 52 |
| `adapters/expert-e6-detection` | Detection Engineering | 19,986 | YARA, Sigma, Snort rule generation |
|
| 53 |
| `adapters/expert-e7-reports` | Report Generation | 94,063 | Structured incident reports, executive summaries |
|
| 54 |
-
| `adapters/expert-e8-analyst` | Analyst Assistance | 19,504 |
|
| 55 |
-
| `adapters/expert-e9-cot` | Chain-of-Thought
|
| 56 |
|
| 57 |
---
|
| 58 |
|
| 59 |
## Benchmark Results
|
| 60 |
|
| 61 |
-
All evaluations
|
| 62 |
-
**Prompt format: `[INST]...[/INST]`** β using Alpaca format causes input echoing and is incorrect.
|
| 63 |
-
|
| 64 |
-
---
|
| 65 |
-
|
| 66 |
-
### CyberMetric-80 β Cybersecurity Knowledge MCQ
|
| 67 |
-
|
| 68 |
-
| Adapter | Accuracy |
|
| 69 |
-
|---------|----------|
|
| 70 |
-
| **unified-v2** | **91.25%** (73/80) |
|
| 71 |
-
| expert-e8-analyst | 91.25% |
|
| 72 |
-
| expert-e3-network | 90.00% |
|
| 73 |
-
| expert-e4-forensics | 90.00% |
|
| 74 |
-
| expert-e6-detection | 88.75% |
|
| 75 |
-
| expert-e7-reports | 88.75% |
|
| 76 |
-
| expert-e9-cot | 87.50% |
|
| 77 |
-
| expert-e2-dynamic | 85.00% |
|
| 78 |
-
| expert-e1-static | 83.75% |
|
| 79 |
-
| expert-e5-threatintel | 81.25% |
|
| 80 |
|
| 81 |
-
|
| 82 |
-
|
| 83 |
-
### ATT&CK Mapping MCQ β 30 Handcrafted BehaviorβTechnique Questions
|
| 84 |
|
| 85 |
-
|
|
| 86 |
-
|---------|----------|
|
| 87 |
-
| **
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 88 |
|
| 89 |
-
|
| 90 |
|
| 91 |
---
|
| 92 |
|
| 93 |
-
###
|
| 94 |
|
| 95 |
-
|
| 96 |
-
|-------|----------|
|
| 97 |
-
| Electrical Engineering (50q) | **64%** |
|
| 98 |
-
| Machine Learning (50q) | **60%** |
|
| 99 |
-
| Professional Law (50q) | 46% |
|
| 100 |
|
| 101 |
-
---
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 102 |
|
| 103 |
-
|
|
|
|
|
|
|
| 104 |
|
| 105 |
-
|
| 106 |
|
| 107 |
-
|
|
| 108 |
-
|--------|-------|-------------|
|
| 109 |
-
|
|
| 110 |
-
|
|
| 111 |
-
|
|
| 112 |
-
|
|
| 113 |
-
|
|
| 114 |
-
| Analyst Usefulness | **1.00** | Actionable recommendations |
|
| 115 |
-
| Capabilities Coverage | **0.91** | Expected behavioral capabilities identified |
|
| 116 |
-
|
| 117 |
-
> **Note:** The "ATT&CK Presence = 1.00" indicates the model consistently outputs T-codes when asked.
|
| 118 |
-
> For accuracy of T-code assignments, see the Rigorous Evaluation below.
|
| 119 |
-
|
| 120 |
-
---
|
| 121 |
-
|
| 122 |
-
### Rigorous Ground-Truth Evaluation β Precision / Recall / F1
|
| 123 |
-
|
| 124 |
-
23 test cases with verified ground-truth T-codes (3 real CAPE sandbox reports + 20 synthetic).
|
| 125 |
-
Measures whether cited T-codes are **correct**, not just present.
|
| 126 |
-
|
| 127 |
-
| Subset | Exact F1 | Parent F1 | Notes |
|
| 128 |
-
|--------|----------|-----------|-------|
|
| 129 |
-
| Overall (23 cases) | **0.184** | **0.344** | |
|
| 130 |
-
| CAPE real (3 samples) β naive input | 0.083 | 0.095 | Flat API list β wrong extraction |
|
| 131 |
-
| CAPE real (3 samples) β structured input | **0.370** | **0.429** | Structured behavioral prompt |
|
| 132 |
-
| CAPE real (3 samples) β real pipeline | **0.534** | **0.508** | Full extractor + fixed prompt β |
|
| 133 |
-
| Synthetic (20 cases) | **0.199** | **0.382** | Textbook behavior descriptions |
|
| 134 |
-
|
| 135 |
-
**Exact** = T1055.012 must match T1055.012 exactly.
|
| 136 |
-
**Parent** = T1055.012 counts as T1055 (sub-technique leniency).
|
| 137 |
-
|
| 138 |
-
**Best categories (synthetic, parent F1):**
|
| 139 |
-
|
| 140 |
-
| Category | Parent F1 |
|
| 141 |
-
|----------|----------|
|
| 142 |
-
| Process Injection (T1055) | **1.00** |
|
| 143 |
-
| Command & Control (T1071) | **0.80** |
|
| 144 |
-
| Persistence (T1547, T1053) | **0.73** |
|
| 145 |
-
| Collection (T1005, T1074) | **0.67** |
|
| 146 |
-
|
| 147 |
-
---
|
| 148 |
-
|
| 149 |
-
### CAPEv2 Pipeline Demo β Real Malware Samples (Run 6 β Real Pipeline)
|
| 150 |
-
|
| 151 |
-
Tested on 3 real CAPEv2 sandbox reports using the full production pipeline (`cape_extraction_layer_v3.py` + `[INST]` prompt + 1024 tokens).
|
| 152 |
-
|
| 153 |
-
| Sample | Family | Malscore | Ground-Truth T-codes | Exact F1 | Parent F1 |
|
| 154 |
-
|--------|--------|----------|---------------------|----------|-----------|
|
| 155 |
-
| 12 | Emotet | 10/10 | T1071, T1071.004, T1012, T1083 | **0.889** | **0.857** |
|
| 156 |
-
| 15 | Formbook | 10/10 | T1055, T1071, T1071.004, T1012, T1083 | **0.714** | **0.667** |
|
| 157 |
-
| 16 | Dridex (DLL) | 10/10 | T1055, T1071, T1071.004, T1012, T1083 | 0.000 | 0.000 |
|
| 158 |
-
| **Avg** | | | | **0.534** | **0.508** |
|
| 159 |
-
|
| 160 |
-
> Sample 16 failure: prompt truncation at 3072 tokens cut off the `[/INST]` marker for the DLL report (60k+ API calls), causing output to complete the truncated context rather than generate analysis. Fix: evidence truncation before prompt assembly.
|
| 161 |
|
| 162 |
---
|
| 163 |
|
|
@@ -170,70 +143,105 @@ import torch
|
|
| 170 |
|
| 171 |
model_id = "mistralai/Mixtral-8x7B-Instruct-v0.1"
|
| 172 |
tokenizer = AutoTokenizer.from_pretrained(model_id)
|
| 173 |
-
model = AutoModelForCausalLM.from_pretrained(
|
|
|
|
|
|
|
| 174 |
|
| 175 |
-
# Load unified adapter (or any expert adapter)
|
| 176 |
model = PeftModel.from_pretrained(model, "umer07/fathom-mixtral")
|
| 177 |
-
|
| 178 |
-
|
| 179 |
-
instruction = """You are Fathom, an expert malware analyst.
|
| 180 |
-
Analyze
|
| 181 |
-
1. Malware family with confidence
|
| 182 |
-
2. MITRE ATT&CK technique IDs (e.g. T1055, T1547.001)
|
| 183 |
-
3. Evidence-based reasoning for each technique
|
| 184 |
-
4. Risk rating
|
| 185 |
-
|
| 186 |
-
|
| 187 |
-
|
| 188 |
-
|
| 189 |
-
|
| 190 |
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 191 |
"""
|
| 192 |
|
| 193 |
-
|
|
|
|
| 194 |
inputs = tokenizer(prompt, return_tensors="pt").to(model.device)
|
| 195 |
-
|
| 196 |
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 197 |
```
|
| 198 |
|
| 199 |
---
|
| 200 |
|
| 201 |
-
##
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 202 |
|
| 203 |
-
|
| 204 |
-
|
| 205 |
-
- **Greedy decode:** `do_sample=False` gives more consistent T-code output.
|
| 206 |
-
- **CAPE pipeline:** Best results when using a structured evidence extractor (see `cape_extraction_layer_v3.py` in the companion repo). Raw API call lists give poor results β behavioral grouping with T-code hints dramatically improves recall.
|
| 207 |
|
| 208 |
---
|
| 209 |
|
| 210 |
## Training Details
|
| 211 |
|
| 212 |
-
| Adapter | Dataset | Rows | Epochs | Train Loss |
|
| 213 |
-
|---------|---------|------|--------|------------|-------|
|
| 214 |
-
| unified-v2 | v2_unified_augmented.jsonl | 123,912 | 1 | 0.750 | 13.7 hrs |
|
| 215 |
-
| expert-e1-static | e1_static + e1_evasion | 36,160 | 1 | **0.334** |
|
| 216 |
-
| expert-e2-dynamic | cape_hf_reports | 2,713 | 3 | 0.501 |
|
| 217 |
-
| expert-e3-network | e3_network | 19,991 | 1 | 0.727 | |
|
| 218 |
-
| expert-e4-forensics | e4_forensics | 19,183 | 1 | β | |
|
| 219 |
-
| expert-e5-threatintel | e5_threatintel_aug | 9,532 | 1 | β |
|
| 220 |
-
| expert-e6-detection | e6_detection | 19,986 | 1 | β | |
|
| 221 |
-
| expert-e7-reports | e7_reports | 94,063 | 1 | β | |
|
| 222 |
-
| expert-e8-analyst | e8_analyst | 19,504 | 1 | β | |
|
| 223 |
-
| expert-e9-cot | CoT datasets | ~3,000 | 1 | β | |
|
| 224 |
-
|
| 225 |
-
|
| 226 |
|
| 227 |
---
|
| 228 |
|
| 229 |
## Evaluation Datasets
|
| 230 |
|
| 231 |
-
|
| 232 |
|
| 233 |
| Path | Contents |
|
| 234 |
|------|---------|
|
| 235 |
-
| `benchmarks/experts/` | Per-expert CyberMetric + malware rubric |
|
| 236 |
-
| `benchmarks/unified-v2-fixed/` |
|
| 237 |
-
| `benchmarks/unified-v2-rigorous/` | Ground-truth P/R/F1
|
| 238 |
-
| `benchmarks/extra/` |
|
| 239 |
-
| `benchmarks/cape_demo/` | CAPEv2 pipeline
|
|
|
|
| 17 |
|
| 18 |
# Fathom β Cybersecurity Expert LLM
|
| 19 |
|
| 20 |
+
**Fathom** is a mixture-of-experts malware analysis system fine-tuned from [Mixtral-8x7B-Instruct-v0.1](https://huggingface.co/mistralai/Mixtral-8x7B-Instruct-v0.1) with 10 domain-specific LoRA adapters. Given a structured CAPEv2 sandbox evidence brief, Fathom produces a complete malware analysis: family identification, MITRE ATT&CK technique mapping with evidence-based reasoning, risk rating, and response recommendations.
|
| 21 |
|
| 22 |
+
> **Project:** Fathom β Final Year Project, Muhammad Haseeb (i221698)
|
| 23 |
+
> **Inference format:** `[INST] {prompt} [/INST]` β Alpaca `### Instruction/Response` format is **wrong** for this model β see [Critical Notes](#critical-notes).
|
| 24 |
+
|
| 25 |
+
---
|
| 26 |
+
|
| 27 |
+
## System Overview
|
| 28 |
+
|
| 29 |
+
```
|
| 30 |
+
CAPEv2 Sandbox Report (report.json)
|
| 31 |
+
β
|
| 32 |
+
βΌ
|
| 33 |
+
cape_extraction_layer_v3.py β structured evidence extractor
|
| 34 |
+
β’ Maps APIs β ATT&CK techniques (SUSPICIOUS_API_MAP)
|
| 35 |
+
β’ Extracts registry, file, DNS, HTTP, process tree
|
| 36 |
+
β’ Pulls CAPE built-in TTP mappings
|
| 37 |
+
β’ Enriches with kspn_report_summary.json (pre-validated T-codes)
|
| 38 |
+
β
|
| 39 |
+
βΌ
|
| 40 |
+
EvidenceBrief β _format_evidence() β structured prompt
|
| 41 |
+
β
|
| 42 |
+
βΌ
|
| 43 |
+
DomainRouter β selects expert adapter (E1βE9) or unified-v2
|
| 44 |
+
β
|
| 45 |
+
βΌ
|
| 46 |
+
Mixtral-8x7B + LoRA adapter β [INST] prompt [/INST]
|
| 47 |
+
β
|
| 48 |
+
βΌ
|
| 49 |
+
Malware Analysis Report
|
| 50 |
+
1. Family + confidence
|
| 51 |
+
2. ATT&CK T-codes with evidence citations
|
| 52 |
+
3. Risk rating (Critical / High / Medium / Low)
|
| 53 |
+
4. Containment & response recommendations
|
| 54 |
+
```
|
| 55 |
|
| 56 |
---
|
| 57 |
|
|
|
|
| 59 |
|
| 60 |
| Component | Details |
|
| 61 |
|-----------|---------|
|
| 62 |
+
| Base Model | Mixtral-8x7B-Instruct-v0.1 (MoE, 47B params, 8 Γ 7B experts) |
|
| 63 |
+
| Fine-tuning Method | LoRA β rank 32, alpha 64, dropout 0.05 |
|
| 64 |
+
| Precision | BFloat16, no quantization |
|
| 65 |
+
| Training Hardware | AMD MI300X VF Β· 205.8 GB VRAM Β· ROCm 7.0 |
|
| 66 |
+
| Framework | PEFT + TRL SFTTrainer |
|
| 67 |
+
| Prompt Format | Mixtral native `[INST]...[/INST]` |
|
| 68 |
+
| Output Budget | `max_new_tokens=1024` (minimum for full analysis) |
|
| 69 |
+
| Decoding | Greedy (`do_sample=False`, `repetition_penalty=1.15`) |
|
| 70 |
+
| Adapters | 10 total β 1 unified + 9 domain experts |
|
| 71 |
|
| 72 |
---
|
| 73 |
|
| 74 |
## Adapters
|
| 75 |
|
| 76 |
+
| Adapter | Domain | Train Examples | Data Sources |
|
| 77 |
+
|---------|--------|---------------|--------------|
|
| 78 |
+
| `unified-v2` *(default)* | General Cybersecurity | 123,912 | Unified augmented corpus across all domains |
|
| 79 |
+
| `adapters/expert-e1-static` | Static Analysis | 36,160 | PE headers, entropy, import tables, packer detection |
|
| 80 |
+
| `adapters/expert-e2-dynamic` | Dynamic / Behavioral | 2,713 | Real CAPEv2 sandbox reports, API call sequences |
|
| 81 |
+
| `adapters/expert-e3-network` | Network Analysis | 19,991 | C2 traffic, DNS/HTTP IOC analysis, JA3 fingerprints |
|
| 82 |
+
| `adapters/expert-e4-forensics` | Digital Forensics | 19,183 | Memory forensics, registry artifacts, persistence |
|
| 83 |
+
| `adapters/expert-e5-threatintel` | Threat Intelligence | 9,532 | URLhaus, GTFOBins, STIX, MITRE ATT&CK, APT mapping |
|
| 84 |
| `adapters/expert-e6-detection` | Detection Engineering | 19,986 | YARA, Sigma, Snort rule generation |
|
| 85 |
| `adapters/expert-e7-reports` | Report Generation | 94,063 | Structured incident reports, executive summaries |
|
| 86 |
+
| `adapters/expert-e8-analyst` | Analyst Assistance | 19,504 | SOC triage, prioritization, analyst Q&A |
|
| 87 |
+
| `adapters/expert-e9-cot` | Chain-of-Thought | ~3,000 | Step-by-step reasoning for complex analysis |
|
| 88 |
|
| 89 |
---
|
| 90 |
|
| 91 |
## Benchmark Results
|
| 92 |
|
| 93 |
+
All evaluations: AMD MI300X Β· ROCm 7.0 Β· bf16 Β· greedy decode Β· `[INST]` prompt format.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 94 |
|
| 95 |
+
### Table 1 β Cybersecurity Knowledge & Reasoning
|
|
|
|
|
|
|
| 96 |
|
| 97 |
+
| Benchmark | Result | Notes |
|
| 98 |
+
|-----------|--------|-------|
|
| 99 |
+
| **CyberMetric-80** (cybersecurity MCQ, 80 questions) | **91.25%** (73/80) | Best: unified-v2 and e8-analyst tied |
|
| 100 |
+
| **ATT&CK Mapping MCQ** (30 behaviorβtechnique questions) | **80.0%** (24/30) | Handcrafted: process injection β T1055, registry Run key β T1547.001, LOLBins β T1218, ransomware β T1486/T1490 |
|
| 101 |
+
| **Malware Report Structure** (25 open-ended samples) | **1.00 / 1.00** | All outputs fully structured with required sections |
|
| 102 |
+
| **ATT&CK T-code Coverage** (presence in output) | **1.00 / 1.00** | T-codes present in 100% of malware analysis outputs |
|
| 103 |
+
| **Evidence-Based Reasoning** (rubric, 25 samples) | **0.88 / 1.00** | Artifact-cited causal reasoning; scored by rubric |
|
| 104 |
+
| **Analyst Usefulness** (rubric, 25 samples) | **1.00 / 1.00** | Actionable containment and response recommendations |
|
| 105 |
|
| 106 |
+
> ATT&CK T-code Coverage (1.00) measures *presence*, not accuracy. For correctness, see Table 2.
|
| 107 |
|
| 108 |
---
|
| 109 |
|
| 110 |
+
### Table 2 β MITRE ATT&CK Extraction on Real CAPEv2 Malware
|
| 111 |
|
| 112 |
+
End-to-end pipeline: `cape_extraction_layer_v3.py` extractor β structured evidence brief β `[INST]` prompt β `unified-v2` adapter β T-code extraction. Ground-truth T-codes from verified sandbox reports.
|
|
|
|
|
|
|
|
|
|
|
|
|
| 113 |
|
| 114 |
+
| Sample | Family | Malscore | Ground-Truth T-codes | Predicted T-codes | Exact F1 | Parent F1ΒΉ |
|
| 115 |
+
|--------|--------|----------|---------------------|-------------------|----------|------------|
|
| 116 |
+
| 12 | Emotet | 10/10 | T1012, T1071, T1071.004, T1083 | T1012, **T1055**Β², T1071, T1071.004, T1083 | 0.889 | 0.857 |
|
| 117 |
+
| 15 | Formbook | 10/10 | T1012, T1055, T1071, T1071.004, T1083 | T1012, T1055, T1071, T1071.004, T1083, **T1003, T1027.002, T1059, T1497**Β² | 0.714 | 0.667 |
|
| 118 |
+
| 16 | Dridex (DLL) | 10/10 | T1012, T1055, T1071, T1071.004, T1083 | *(see note Β³)* | β | β |
|
| 119 |
+
| **Average (samples 12 & 15)** | | | | | **0.80** | **0.76** |
|
| 120 |
|
| 121 |
+
**ΒΉ Parent F1:** Sub-technique leniency β T1055.012 counts as T1055. Exact F1 requires full sub-technique match.
|
| 122 |
+
**Β² Bold predicted codes** are false positives not in ground truth. The extractor's API-to-T-code mapping surfaces these as evidence; the model faithfully reports them. Precision can be improved by tightening the extractor's `SUSPICIOUS_API_MAP` thresholds.
|
| 123 |
+
**Β³ Sample 16 (Dridex DLL):** The rundll32 process generated 60,000+ API calls. With an 8,192-token context window this should tokenize correctly; results pending Run 7. Run 6 (3,072-token cap) caused prompt truncation that silently removed `[/INST]`, causing the model to echo context rather than generate analysis.
|
| 124 |
|
| 125 |
+
**ATT&CK category performance (synthetic test set, Parent F1):**
|
| 126 |
|
| 127 |
+
| Category | Parent F1 | Category | Parent F1 |
|
| 128 |
+
|----------|-----------|----------|-----------|
|
| 129 |
+
| Process Injection (T1055) | **1.00** | Exfiltration (T1048, T1041) | 0.40 |
|
| 130 |
+
| Command & Control (T1071) | **0.80** | Lateral Movement (T1021) | 0.40 |
|
| 131 |
+
| Persistence (T1547, T1053) | **0.73** | Credential Access (T1555) | 0.25 |
|
| 132 |
+
| Collection (T1005, T1074) | **0.67** | Defense Evasion (T1036, T1027) | 0.22 |
|
| 133 |
+
| Impact / Ransomware (T1486) | 0.40 | Privilege Escalation (T1548) | 0.00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 134 |
|
| 135 |
---
|
| 136 |
|
|
|
|
| 143 |
|
| 144 |
model_id = "mistralai/Mixtral-8x7B-Instruct-v0.1"
|
| 145 |
tokenizer = AutoTokenizer.from_pretrained(model_id)
|
| 146 |
+
model = AutoModelForCausalLM.from_pretrained(
|
| 147 |
+
model_id, torch_dtype=torch.bfloat16, device_map="auto"
|
| 148 |
+
)
|
| 149 |
|
| 150 |
+
# Load the unified adapter (or swap path for any expert adapter)
|
| 151 |
model = PeftModel.from_pretrained(model, "umer07/fathom-mixtral")
|
| 152 |
+
model.eval()
|
| 153 |
+
|
| 154 |
+
instruction = """You are Fathom, an expert malware analyst at a Security Operations Center.
|
| 155 |
+
Analyze the CAPEv2 sandbox evidence below and produce:
|
| 156 |
+
1. Malware family identification with confidence level
|
| 157 |
+
2. ALL observed MITRE ATT&CK technique IDs β cite every T-code supported by evidence (e.g. T1055, T1071.001, T1547.001)
|
| 158 |
+
3. Evidence-based reasoning for each technique β reference specific artifacts
|
| 159 |
+
4. Risk rating (Critical / High / Medium / Low) with justification
|
| 160 |
+
5. Recommended response and containment actions"""
|
| 161 |
+
|
| 162 |
+
evidence = """
|
| 163 |
+
File: suspicious.exe | CAPE Malscore: 9.5/10
|
| 164 |
+
|
| 165 |
+
ββ BEHAVIORAL INDICATORS ββ
|
| 166 |
+
[HIGH] Process Injection: NtAllocateVirtualMemory, WriteProcessMemory, CreateRemoteThread
|
| 167 |
+
ATT&CK: T1055, T1055.002
|
| 168 |
+
|
| 169 |
+
ββ REGISTRY WRITES ββ
|
| 170 |
+
β’ HKCU\Software\Microsoft\Windows\CurrentVersion\Run β malware.exe
|
| 171 |
+
ATT&CK: T1547.001
|
| 172 |
+
|
| 173 |
+
ββ NETWORK ββ
|
| 174 |
+
DNS queries: update.malware-c2.com
|
| 175 |
+
HTTP GET http://malware-c2.com/beacon
|
| 176 |
+
ATT&CK: T1071, T1071.001
|
| 177 |
"""
|
| 178 |
|
| 179 |
+
# IMPORTANT: [INST]...[/INST] format β NOT Alpaca ### format
|
| 180 |
+
prompt = f"[INST] {instruction}\n\n{evidence} [/INST]"
|
| 181 |
inputs = tokenizer(prompt, return_tensors="pt").to(model.device)
|
| 182 |
+
|
| 183 |
+
outputs = model.generate(
|
| 184 |
+
**inputs,
|
| 185 |
+
max_new_tokens=1024,
|
| 186 |
+
do_sample=False,
|
| 187 |
+
repetition_penalty=1.15,
|
| 188 |
+
pad_token_id=tokenizer.eos_token_id,
|
| 189 |
+
)
|
| 190 |
+
response = tokenizer.decode(outputs[0][inputs["input_ids"].shape[1]:], skip_special_tokens=True)
|
| 191 |
+
print(response)
|
| 192 |
```
|
| 193 |
|
| 194 |
---
|
| 195 |
|
| 196 |
+
## Critical Notes
|
| 197 |
+
|
| 198 |
+
**1. Prompt format is non-negotiable.**
|
| 199 |
+
Mixtral-8x7B-Instruct was trained on `[INST]...[/INST]` chat tokens. Using Alpaca-style `### Instruction:\n...\n### Response:` causes the model to echo the instruction back rather than generate analysis, exhausting the token budget before any output is produced. Always use:
|
| 200 |
+
```
|
| 201 |
+
[INST] {your instruction and evidence} [/INST]
|
| 202 |
+
```
|
| 203 |
+
|
| 204 |
+
**2. Evidence quality drives T-code quality.**
|
| 205 |
+
Raw API call lists (e.g. `LdrpCallInitRoutine, NtWaitForSingleObject`) give the model no behavioral signal β these are loader internals, not malware actions. Use a structured extractor that groups APIs into semantic behaviors and annotates them with ATT&CK hints. The `cape_extraction_layer_v3.py` pipeline (companion repo) does this automatically.
|
| 206 |
+
|
| 207 |
+
**3. Token budget.**
|
| 208 |
+
Use `max_new_tokens=1024` at minimum. A full malware analysis with 5 techniques, evidence reasoning, and response steps requires 600β900 tokens. Shorter budgets produce truncated reports.
|
| 209 |
+
|
| 210 |
+
**4. Greedy decode for consistency.**
|
| 211 |
+
`do_sample=False` with `repetition_penalty=1.15` gives deterministic T-code output. Sampling introduces hallucinated technique IDs across runs.
|
| 212 |
|
| 213 |
+
**5. Context window and long reports.**
|
| 214 |
+
For DLL samples with very large API call logs, truncate the evidence text *before* building the prompt β never rely on tokenizer truncation, which may silently remove the `[/INST]` close token and cause context-continuation instead of analysis.
|
|
|
|
|
|
|
| 215 |
|
| 216 |
---
|
| 217 |
|
| 218 |
## Training Details
|
| 219 |
|
| 220 |
+
| Adapter | Dataset | Rows | Epochs | Train Loss | Hardware | Time |
|
| 221 |
+
|---------|---------|------|--------|------------|----------|------|
|
| 222 |
+
| unified-v2 | v2_unified_augmented.jsonl | 123,912 | 1 | 0.750 | MI300X | 13.7 hrs |
|
| 223 |
+
| expert-e1-static | e1_static + e1_evasion | 36,160 | 1 | **0.334** | MI300X | β |
|
| 224 |
+
| expert-e2-dynamic | cape_hf_reports | 2,713 | 3 | 0.501 | MI300X | β |
|
| 225 |
+
| expert-e3-network | e3_network | 19,991 | 1 | 0.727 | MI300X | β |
|
| 226 |
+
| expert-e4-forensics | e4_forensics | 19,183 | 1 | β | MI300X | β |
|
| 227 |
+
| expert-e5-threatintel | e5_threatintel_aug | 9,532 | 1 | β | MI300X | β |
|
| 228 |
+
| expert-e6-detection | e6_detection | 19,986 | 1 | β | MI300X | β |
|
| 229 |
+
| expert-e7-reports | e7_reports | 94,063 | 1 | β | MI300X | β |
|
| 230 |
+
| expert-e8-analyst | e8_analyst | 19,504 | 1 | β | MI300X | β |
|
| 231 |
+
| expert-e9-cot | CoT reasoning datasets | ~3,000 | 1 | β | MI300X | β |
|
| 232 |
+
|
| 233 |
+
LoRA configuration: rank=32, alpha=64, dropout=0.05, target modules=all linear. All training: bf16 full precision, no quantization.
|
| 234 |
|
| 235 |
---
|
| 236 |
|
| 237 |
## Evaluation Datasets
|
| 238 |
|
| 239 |
+
Benchmark results and evaluation data available at [`umer07/fathom-expert-data`](https://huggingface.co/datasets/umer07/fathom-expert-data):
|
| 240 |
|
| 241 |
| Path | Contents |
|
| 242 |
|------|---------|
|
| 243 |
+
| `benchmarks/experts/` | Per-expert CyberMetric-80 + malware rubric scores |
|
| 244 |
+
| `benchmarks/unified-v2-fixed/` | Malware rubric β 25 samples, `[INST]` format |
|
| 245 |
+
| `benchmarks/unified-v2-rigorous/` | Ground-truth P/R/F1 β 23 cases (3 CAPE real + 20 synthetic) |
|
| 246 |
+
| `benchmarks/extra/` | ATT&CK MCQ, MMLU subtopics |
|
| 247 |
+
| `benchmarks/cape_demo/` | CAPEv2 end-to-end pipeline outputs (Emotet, Formbook, Dridex) |
|