Threat Hunt

Threat Hunt

This skill activates when the user or conversation involves: - Investigating security events or suspicious activity - Breach investigation or incident response - Threat hunting across audit logs or event streams - Indicators of Compromise (IOCs) such as suspicious IPs, domains, hashes, or file paths - Correlating security events across multiple sources - MITRE ATT&CK technique references - "BLOCKED by Clawdstrike" or similar denial messages appearing in conversation output - Repeated policy denials or unexpected security enforcement behavior

Investigation Workflow

Follow this structured approach when investigating security events:

1. Establish Timeline

Call clawdstrike_timeline to get a chronological view of recent events:

• Start with a broad time range, then narrow down
• Look for clusters of activity that indicate automated or coordinated actions
• Note any gaps that might indicate log tampering

2. Query and Filter

Use clawdstrike_query to drill into specific criteria:

• Filter by verdict (allow/deny/audit) to find blocked actions
• Filter by action_type (file/shell/egress/mcp_tool) to focus investigation
• Filter by guard name to see which security controls were triggered
• Search for specific paths, commands, or domains

3. Correlate Events

Run clawdstrike_correlate to detect patterns across events:

• Use built-in correlation rules to identify attack sequences
• Look for lateral movement patterns (multiple targets from one source)
• Detect privilege escalation attempts (sequence of increasingly sensitive operations)
• Identify data exfiltration patterns (sensitive file reads followed by egress)

4. Check IOCs

Use clawdstrike_ioc to check indicators against threat intelligence:

• Submit suspicious domains, IPs, file hashes, or paths
• Cross-reference with known threat actor TTPs
• Check if IOCs appear in multiple events (indicating persistence)

5. Generate Report

Call clawdstrike_report to produce a structured investigation summary:

• Include timeline of events, findings, and recommended actions
• Reference specific events by ID for traceability
• Map findings to MITRE ATT&CK techniques where applicable

MITRE ATT&CK Quick Reference

Common techniques to look for in agent security events:

Technique	ID	Indicators
Command and Scripting Interpreter	T1059	Shell commands with encoded payloads, eval/exec usage
File and Directory Discovery	T1083	Enumeration of sensitive directories
Exfiltration Over Web Service	T1567	Egress to uncommon domains after file reads
Credential Access	T1552	Access to .env, .ssh, credential files
Defense Evasion	T1562	Attempts to modify security config or disable guards
Persistence	T1546	Modifications to shell profiles, cron, startup files
Privilege Escalation	T1548	sudo/chmod/chown commands, setuid changes

MITRE Technique to MCP Tool Mapping

Use this table to select the right investigation tool for each technique:

MITRE Technique	ID	Primary MCP Tool	Investigation Approach
Command and Scripting Interpreter	T1059	clawdstrike_query	Filter by action_type=shell, look for encoded payloads or eval/exec
File and Directory Discovery	T1083	clawdstrike_timeline	Broad timeline scan for sequential file reads across sensitive dirs
Exfiltration Over Web Service	T1567	clawdstrike_correlate	Correlate file reads followed by egress to uncommon domains
Credential Access	T1552	clawdstrike_query	Filter by action_type=file targeting .env, .ssh, credential paths
Defense Evasion	T1562	clawdstrike_query	Filter for policy modification attempts or guard config changes
Persistence	T1546	clawdstrike_ioc	Check shell profile, cron, and startup file modifications
Privilege Escalation	T1548	clawdstrike_query	Filter by action_type=shell for sudo, chmod, chown, setuid

Incident Classification

Classify incidents using these severity levels:

Classification	Criteria	Response
P1 - Critical	Active exploitation, data exfiltration confirmed, credential compromise	Immediate remediation, revoke credentials, isolate affected sessions
P2 - High	Blocked exploit attempt, repeated policy violations, suspicious lateral movement	Investigate within current session, tighten policy, monitor for recurrence
P3 - Medium	Single denied action matching known TTP, anomalous but unconfirmed activity	Log for review, verify policy coverage, check for related events
P4 - Low	Informational anomaly, policy audit events, benign tool misuse	Document in report, no immediate action required

Response Guidelines

When this skill is active:

• Present findings in order of severity and confidence
• Always provide specific event IDs and timestamps
• Recommend concrete remediation steps for each finding
• Distinguish between confirmed threats and suspicious activity requiring further investigation