Performing Timeline Reconstruction With Plaso

Performing Timeline Reconstruction With Plaso

Overview

Cybersecurity skill for performing timeline reconstruction with plaso. Follows industry best practices and security standards.

When to Use

Trigger phrases:

• "performing timeline reconstruction with plaso"

• "Build comprehensive forensic super-timelines using Plaso (log2timeline) to corre"

• When building a comprehensive forensic timeline from multiple evidence sources

• For correlating events across file system metadata, event logs, browser history, and registry

• During complex investigations requiring chronological reconstruction of activities

• When standard log analysis is insufficient to establish the sequence of events

• For presenting investigation findings in a visual, chronological format

When NOT to Use

• When you lack proper authorization for testing
• For production systems without change management
• When the task requires legal or compliance expertise beyond technical scope

Prerequisites

• Plaso (log2timeline/psort) installed on forensic workstation
• Forensic disk image(s) in raw (dd), E01, or VMDK format
• Sufficient storage for Plaso output (can be 10x+ the image size)
• Minimum 8GB RAM (16GB+ recommended for large images)
• Timeline Explorer (Eric Zimmerman) or Timesketch for visualization
• Understanding of timestamp types (MACB: Modified, Accessed, Changed, Born)

Workflow

# Example: IOC detection
import re

IOC_PATTERNS = {
    "ip": r"\b(?:\d{1,3}\.){3}\d{1,3}\b",
    "domain": r"\b[a-z0-9-]+\.[a-z]{2,}\b",
    "hash_md5": r"\b[a-f0-9]{32}\b",
    "hash_sha256": r"\b[a-f0-9]{64}\b",
}

def extract_iocs(text: str) -> dict:
    return {k: re.findall(v, text) for k, v in IOC_PATTERNS.items()}

1. Plan Operations — Define objectives, scope, and success criteria for timeline reconstruction operations.
2. Prepare Environment — Set up tools, access, and data sources required for timeline reconstruction.
3. Execute Core Workflow — Use plaso to perform timeline reconstruction operations following established procedures.
4. Validate Results — Verify that results meet quality standards and objectives.
5. Report Findings — Document results, observations, and recommendations.
6. Follow Up — Track remediation actions and verify fixes where applicable.

Tools

• plaso — Primary tool for this skill
• Analysis Platform — Data processing and visualization
• Collaboration Tools — Team coordination and knowledge sharing

Process

1. Design — Define interface, identify patterns, plan implementation
2. Implement — Write code following existing conventions, add tests
3. Verify — Run tests, check integration, validate behavior

Verification

• All timeline reconstruction procedures executed completely and documented
• Findings validated against multiple data sources
• False positives identified and filtered
• Results documented with evidence and timestamps
• Recommendations provided with risk-based prioritization

Anti-Rationalization Table