Analysis Synthesis (Phase 5)

Purpose

Compile all gathered knowledge into actionable intelligence. Validate hypotheses against evidence. Produce structured reports with traceable findings.

When to Use

• Sufficient facts gathered from triage + static + dynamic analysis

• Ready to document understanding for handoff or archival

• Need to present findings to stakeholders

• Before closing analysis session

Synthesis Process

Step 1: Evidence Review

Gather all recorded knowledge:

FACTS collected:

• From triage: arch, ABI, dependencies, capabilities
• From static: functions, xrefs, decompilation
• From dynamic: syscalls, network, file access

HYPOTHESES formed:

• With supporting evidence
• With contradicting evidence
• Unresolved hypotheses

QUESTIONS remaining:

• Blocking questions (prevent conclusion)
• Open questions (future investigation)

Step 2: Hypothesis Validation

For each hypothesis, determine status:

Evidence State Status Action

Strong support, no contradictions Confirmed Include in conclusions

Some support, some contradictions Uncertain Document both sides

Strong contradictions Refuted Explain why wrong

No evidence either way Unvalidated List as unknown

Step 3: Correlation Analysis

Connect findings across phases:

Static finding: Function at 0x8400 calls socket(), connect(), SSL_read() Dynamic finding: connect() to 192.168.1.100:8443 observed Strings found: "api.vendor.com/telemetry"

CORRELATED CONCLUSION: Function 0x8400 is network initialization for telemetry submission to api.vendor.com:8443 over TLS.

Step 4: Capability Mapping

Summarize what the binary CAN do:

Capabilities

Network

• HTTP/HTTPS client (libcurl, libssl imports)
• Custom TCP connections (socket/connect observed)
• Server functionality (no bind/listen/accept)

File System

• Read configuration (/etc/config.json accessed)
• Write logs (/var/log/app.log)
• Execute other programs (no exec* calls)

Cryptography

• TLS encryption (SSL_* imports)
• Symmetric encryption (no AES/DES imports)
• Hashing (no SHA*/MD5 imports)

Step 5: Behavioral Summary

Document observed/inferred behavior:

Behavioral Analysis

Startup Sequence

1. Load configuration from /etc/config.json
2. Initialize network subsystem (function 0x8400)
3. Establish TLS connection to api.vendor.com:8443
4. Enter main loop (function 0x10800)

Main Loop Behavior

• Polls sensor data every 30 seconds (timing from sleep() calls)
• Formats data as JSON (jsmn library identified)
• Submits via HTTPS POST
• Logs results to /var/log/app.log

Error Handling

• Network failures: retry with exponential backoff
• Config errors: exit with code 1
• Unknown errors: continue with default values

Report Template

Binary Analysis Report

Executive Summary

[2-3 sentence overview of what was found]

Artifact Information

Identification

File Type: ELF [32/64]-bit [LSB/MSB] [executable/shared object]

Purpose (Hypothesis): [What we believe this binary does]

Confidence: [High/Medium/Low] - [Brief justification]

Capabilities Summary

Confirmed Capabilities

• [Capability 1] - Evidence: [source]
• [Capability 2] - Evidence: [source]

Potential Capabilities (Unverified)

• [Capability] - Reason: [why suspected]

Technical Findings

Key Functions

External Communications

File System Access

Evidence Log

Confirmed Hypotheses

H1: Binary is a telemetry client

• Status: CONFIRMED
• Supporting evidence:
  • Import of libcurl (HTTP client)
  • String "telemetry" found at 0x12340
  • connect() to api.vendor.com:8443 observed
• Contradicting evidence: None

Refuted Hypotheses

H2: Binary acts as server

• Status: REFUTED
• Reason: No bind/listen/accept imports or calls observed

Unresolved Questions

• Q1: What triggers telemetry submission? (Timing or event-based?)
• Q2: What data is collected? (Need deeper dynamic analysis)

Recommendations

For Security Review

• Verify TLS certificate validation
• Check for hardcoded credentials
• Audit data collection scope

For Further Analysis

• Capture network traffic during execution
• Analyze configuration format in detail
• Test behavior with malformed config

Appendices

A. Tool Outputs

[Truncated raw outputs from key analysis steps]

B. Timeline

[Chronological log of analysis steps taken]

C. File Hashes

[SHA256 of all analyzed files]

Confidence Calibration

Use consistent confidence levels:

Level Meaning Evidence Required

High Near certain Multiple independent sources confirm

Medium Likely correct Some evidence, no contradictions

Low Possible Limited evidence, some uncertainty

Speculative Guess Based on patterns, not direct evidence

Quality Checklist

Before finalizing report:

• All hypotheses have explicit status (confirmed/refuted/uncertain)

• Every conclusion has traceable evidence

• Remaining unknowns are documented

• Technical details are accurate (addresses, names)

• No speculation presented as fact

• Recommendations are actionable

Knowledge Journaling

After synthesis, record final summary for episodic memory:

[BINARY-RE:synthesis] {filename} (sha256: {hash}) Analysis completed: {date} Phases completed: {triage|static|dynamic|synthesis}

=== FINAL CONCLUSIONS ===

Primary purpose: {what binary does} Confidence: {HIGH|MEDIUM|LOW}

Confirmed hypotheses: CONFIRMED: {hypothesis} (evidence: {facts})

Refuted hypotheses: REFUTED: {hypothesis} (reason: {contradicting evidence})

Key capabilities:

• {capability}: {evidence summary}

Security findings: {CRITICAL|HIGH|MEDIUM|LOW}: {finding} (location: {addr/function})

Remaining unknowns: UNRESOLVED: {question}

Recommendations:

• {actionable recommendation}

=== EVIDENCE INDEX === Facts: {count} recorded across phases Hypotheses: {confirmed}/{total} Questions: {answered}/{total}

Example Final Entry

[BINARY-RE:synthesis] thermostat_daemon (sha256: a1b2c3d4...) Analysis completed: 2024-01-15 Phases completed: triage, static, dynamic, synthesis

=== FINAL CONCLUSIONS ===

Primary purpose: IoT telemetry client that reports temperature/humidity to vendor cloud Confidence: HIGH

Confirmed hypotheses: CONFIRMED: "Telemetry client reporting to api.thermco.com" (evidence: URL string, curl imports, connect() observed) CONFIRMED: "30-second reporting interval" (evidence: sleep(30) in main loop, strace timing)

Refuted hypotheses: REFUTED: "May have local web server" (reason: no bind/listen/accept imports or calls)

Key capabilities:

• HTTPS client: libcurl + libssl, connects to api.thermco.com:443
• Config parsing: reads /etc/thermostat.conf at startup
• Logging: writes to /var/log/thermostat.log

Security findings: LOW: No certificate pinning detected (standard libssl usage) INFO: Config file may contain API credentials (needs review)

Remaining unknowns: UNRESOLVED: Exact data fields in telemetry payload UNRESOLVED: Authentication mechanism (API key location)

Recommendations:

• Review /etc/thermostat.conf for sensitive data
• Monitor network traffic to confirm payload contents
• Consider blocking if telemetry is unwanted

=== EVIDENCE INDEX === Facts: 23 recorded across phases Hypotheses: 2/3 confirmed Questions: 4/6 answered

Output Formats

Structured JSON (for tools/databases)

{ "artifact": { "sha256": "...", "arch": "arm" }, "conclusions": [ { "statement": "Binary is telemetry client", "confidence": 0.9, "evidence": ["fact_001", "fact_012", "obs_003"] } ], "capabilities": { "network_client": true, "network_server": false }, "open_questions": ["Q1: Trigger mechanism"] }

Markdown (for human readers)

See template above.

STIX/TAXII (for threat intelligence)

If binary is potentially malicious, format findings for sharing:

{ "type": "malware", "spec_version": "2.1", "id": "malware--...", "name": "telemetry-client", "malware_types": ["spyware"], "capabilities": ["exfiltrates-data"], "implementation_languages": ["c"] }

Next Steps

After synthesis:

• Archive analysis artifacts

• Share report with stakeholders

• Document lessons learned

• Update tool configurations if needed