Digital Forensics Analysis Toolkit

Comprehensive digital forensics investigation framework covering evidence acquisition, filesystem analysis, memory forensics, network packet analysis, and forensic reporting for incident response.

When to Use This Skill

Choose Digital Forensics Analysis when:

• Investigating security incidents requiring evidence preservation
• Analyzing compromised systems for indicators of compromise
• Performing malware analysis on suspicious files
• Conducting log analysis across multiple system sources
• Preparing forensic reports for incident documentation

Consider alternatives when:

• You need real-time threat detection — use SIEM tools
• Performing routine vulnerability scanning — use dedicated scanners
• Need active threat response — use EDR/XDR platforms

Quick Start

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# Activate forensics toolkit
claude skill activate pro-digital-forensics-analysis-toolkit

# Analyze a disk image
claude "Perform forensic analysis on the disk image at /evidence/case001.dd"

# Memory forensics
claude "Analyze the memory dump for indicators of compromise"

Example Investigation Workflow

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# 1. Evidence Acquisition - Create forensic disk image
dd if=/dev/sda of=/evidence/disk.dd bs=4096 conv=noerror,sync status=progress
# Generate hash for integrity verification
sha256sum /evidence/disk.dd > /evidence/disk.dd.sha256

# 2. Mount read-only for analysis
mkdir /mnt/evidence
mount -o ro,loop,noexec /evidence/disk.dd /mnt/evidence

# 3. Timeline generation
find /mnt/evidence -type f -printf '%T+ %p\n' | sort > timeline.txt

# 4. Extract and analyze logs
cat /mnt/evidence/var/log/auth.log | grep -E "Failed|Accepted|session opened"

# 5. File carving for deleted files
foremost -t jpg,pdf,doc -i /evidence/disk.dd -o /evidence/carved/

# 6. Hash analysis against known malware
md5deep -r /mnt/evidence/tmp/ > file_hashes.txt

Core Concepts

Forensic Analysis Phases

Phase	Description	Tools
Identification	Determine scope and evidence sources	Case documentation
Preservation	Create forensic copies, establish chain of custody	dd, dc3dd, FTK Imager
Analysis	Examine evidence for artifacts and indicators	Autopsy, Volatility, Wireshark
Documentation	Record findings with timestamps and evidence links	Forensic report templates
Presentation	Prepare findings for stakeholders or legal proceedings	Timeline visualizations

Evidence Types and Analysis

Evidence Type	Artifacts	Analysis Method
Filesystem	Files, deleted data, timestamps, permissions	Timeline analysis, file carving
Memory	Running processes, network connections, encryption keys	Volatility framework
Network	Packet captures, DNS queries, flow data	Wireshark, tcpdump, Zeek
Logs	System events, application logs, audit trails	Log correlation, pattern matching
Registry (Windows)	User activity, installed software, persistence	Registry hive analysis
Browser	History, cookies, cached pages, downloads	Browser artifact extraction

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# Volatility memory analysis commands
# Identify operating system profile
volatility -f memory.dmp imageinfo

# List running processes
volatility -f memory.dmp --profile=Win10x64 pslist

# Find hidden processes
volatility -f memory.dmp --profile=Win10x64 psscan

# Extract network connections
volatility -f memory.dmp --profile=Win10x64 netscan

# Dump suspicious process memory
volatility -f memory.dmp --profile=Win10x64 memdump -p 1234 -D /evidence/proc/

# Check for code injection
volatility -f memory.dmp --profile=Win10x64 malfind

Configuration

Parameter	Description	Default
case_id	Unique case identifier for evidence tracking	Required
evidence_dir	Root directory for evidence storage	/evidence
hash_algorithm	Hash algorithm for integrity verification	sha256
timezone	Timezone for timestamp normalization	UTC
preserve_timestamps	Maintain original file timestamps	true
chain_of_custody	Enable chain of custody logging	true
report_format	Output format: html, pdf, markdown	markdown

Best Practices

1. Never modify original evidence — Always work on forensic copies. Mount evidence images as read-only and use write blockers for physical media. A single modified byte can invalidate an entire evidence chain in legal proceedings.

2. Document every action with timestamps — Maintain a detailed forensic log of every command executed, every file accessed, and every finding discovered. Include your timezone, tool versions, and the exact commands used for reproducibility.

3. Establish and maintain chain of custody — Record who handled the evidence, when, and what actions were taken. Use cryptographic hashes to verify evidence integrity at every transfer point and before each analysis session.

4. Normalize timestamps before correlation — Different systems use different timezones, clock skew, and timestamp formats. Convert all timestamps to UTC before building timelines to avoid false chronological orderings.

5. Use multiple tools to verify findings — Cross-verify important findings with at least two different tools or techniques. Single-tool analysis can produce false positives or miss artifacts that other tools detect through different methods.

Common Issues

Evidence integrity hash doesn't match after copying. This typically indicates I/O errors during acquisition. Use dc3dd or dd with conv=noerror,sync to handle bad sectors gracefully. Always verify hashes immediately after acquisition and re-acquire if mismatched. Network transfers should use integrity-checked protocols.

Timestamps show impossible sequences or future dates. Attackers frequently manipulate file timestamps (timestomping) to cover their tracks. Cross-reference filesystem timestamps with log entries, journal records, and MFT entries which are harder to forge consistently. Look for MACE (Modified, Accessed, Created, Entry) timestamp inconsistencies.

Memory analysis tools fail to identify the correct OS profile. Memory dumps may be corrupted, partially overwritten, or from an unusual OS version. Try multiple profiles, use volatility kdbgscan to find kernel debugger data blocks, and verify the dump size matches expected physical memory. For virtual machines, use hypervisor-level memory acquisition for cleaner dumps.