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Timesketch

Timesketch is an open-source forensic timeline analysis tool used to collaboratively investigate digital evidence. It ingests timelines from multiple sources—such as Plaso, KAPE, Velociraptor, ELK exports, Sysmon logs, and custom CSV files—and allows investigators to correlate events, detect anomalies, and visualize attack sequences. It is widely used in DFIR, SOC operations, and large-scale intrusion investigations.

Understanding Timesketch in Forensics

Timesketch transforms raw forensic logs into an interactive, query-driven timeline. It enables investigators to:

  • Combine multiple evidence sources

  • Search across millions of events

  • Highlight suspicious patterns

  • Annotate findings

  • Build collaborative timelines

  • Document attacker activity chronologically

This makes it a central tool for event reconstruction in modern DFIR workflows.

How Timesketch Works

Timesketch processes event data through:

  1. Import
    Upload timelines (CSV, JSON, Plaso files).

  2. Indexing
    Elasticsearch stores and indexes the events for fast searching.

  3. Analysis
    Built-in or custom analyzers tag suspicious patterns.

  4. Exploration
    Investigators search, filter, label, and visualize events.

  5. Collaboration
    Multiple analysts annotate and comment on timelines.

  6. Reporting
    Export tagged events for final case documentation.

Timeline Sources Supported by Timesketch

Timesketch is compatible with almost any forensic tool that produces structured output.

Examples include:

  • Plaso (log2timeline)

  • KAPE CSV exports

  • Velociraptor artifact logs

  • Sigma-converted detection hits

  • Sysmon logs

  • Windows Event Logs (EVTX converted)

  • Zeek logs

  • Suricata alerts

  • Browser history exports

  • Cloud audit logs

  • Server logs

  • Network metadata

This flexibility lets investigators unify all evidence into a single view.

Key Features for DFIR Investigations

1. Powerful Search & Filtering (Kibana-like KQL)

Example queries:

event_type:"process" AND command_line:*powershell*
source_long:"Security"
message:"login failed"
ip_address:"192.168.1.50"

Search is fast, scalable, and ideal for threat hunting.

2. Tagging & Labeling Events

Analysts can apply labels such as:

  • suspicious

  • credential_access

  • lateral_movement

  • privilege_escalation

  • exfiltration

  • c2_activity

Tags help categorize and document evidence during an investigation.

3. Event Commentary & Notes

Each event can include:

  • Analyst notes

  • Context

  • Investigation findings

Useful for collaborative case work.

4. Visualization Tools

Timesketch provides:

  • Interactive timelines

  • Heatmaps

  • Time-range filters

  • Stacked event frequency graphs

Visuals help identify anomalies, spikes, and attacker movement.

5. Automatic Analysis (Sketch Analyzers)

Analyzers automatically flag important events such as:

  • Suspicious PowerShell usage

  • Rare parent-child processes

  • Indicators of persistence

  • Login anomalies

  • Command execution patterns

  • DNS anomalies

  • Sigma rule matches

This reduces manual workload and speeds up detection.

6. Multi-Source Correlation

Timesketch can merge events from:

  • Plaso

  • KAPE

  • Sysmon

  • Firewall logs

  • Network security tools

  • Cloud platforms

  • Endpoint telemetry

Correlating these sources helps reconstruct complete attack paths.

Common Use Cases of Timesketch

1. Ransomware Investigation

Track:

  • Initial access

  • Execution chain

  • Privilege escalation

  • Lateral movement

  • File encryption timeline

  • Command executions

2. Intrusion & Lateral Movement Analysis

Identify:

  • Footprinting

  • Credential dumping

  • Remote execution

  • RDP usage

  • Suspicious service creation

3. Malware Investigation

Link:

  • Process creation

  • Registry modification

  • Network activity

  • File drops

4. Cloud Compromise Investigation

Correlate:

  • IAM changes

  • API activity

  • Login attempts

  • Region anomalies

  • Data access events

5. Web Server Forensics

Analyze:

  • Access logs

  • Error logs

  • Upload attempts

  • SQL injection indicators

Working with Timesketch (Investigator Workflow)

1. Create a Sketch

Start a new investigative timeline project.

2. Import Data

Upload CSV, JSON, or Plaso output.

log2timeline.py timeline.plaso /evidence/
psort.py -o timesketch -u "case123" timeline.plaso

3. Explore Events

Use filters, search queries, and metadata to uncover suspicious activity.

4. Annotate and Tag

Label events such as:

  • Execution

  • Lateral movement

  • Persistence

  • Exfiltration

5. Correlate Evidence

Combine multiple timelines into a unified view.

6. Export Results

Save tagged events for reporting or import into SIEM systems.

Strengths of Timesketch

  • Designed specifically for forensic timelines

  • Scalable for large enterprise investigations

  • Rich visualization and search capabilities

  • Supports collaboration between analysts

  • Integrates with Plaso and modern DFIR tools

  • Extensible with custom analyzers

  • Cloud-friendly and container-deployable

Limitations

  • Requires Elasticsearch backend

  • Needs structured input formats

  • Resource-heavy for very large datasets

  • No native packet or raw image analysis

Intel Dump

  • Timesketch is a collaborative forensic timeline analysis tool built on Elasticsearch.

  • Supports Plaso, KAPE, Sysmon, Zeek, Suricata, cloud logs, browser history, and more.

  • Key features include advanced search, tagging, notes, visual timelines, analyzers, and multi-source correlation.

  • Ideal for DFIR workflows such as ransomware investigations, intrusion analysis, malware cases, and cloud forensics.

  • Enables investigators to reconstruct attack timelines and document findings efficiently.

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