skill-044

Credential Access TTP Hunt Skill

Proactively hunt for MITRE ATT&CK Credential Access techniques (T1003, T1555, etc.) based on threat intelligence or hypothesis.

Inputs

• TECHNIQUE_IDS - Comma-separated MITRE technique IDs (e.g., "T1003.001,T1555.003")
• TIME_FRAME_HOURS - Lookback period (default: 72)
• (Optional) TARGET_SCOPE_QUERY - UDM query to narrow scope
• (Optional) HUNT_HYPOTHESIS - Reason for the hunt
• (Optional) HUNT_CASE_ID - SOAR case for tracking

Common Techniques

Technique	Description
T1003.001	LSASS Memory
T1003.002	Security Account Manager
T1003.003	NTDS
T1003.004	LSA Secrets
T1003.005	Cached Domain Credentials
T1003.006	DCSync
T1555.001	Keychain
T1555.003	Credentials from Web Browsers
T1555.004	Windows Credential Manager

Workflow

Step 1: Research Techniques

For each technique in TECHNIQUE_IDS:

gti-mcp.get_threat_intel(query="Explain MITRE ATT&CK technique T1003.001")

Understand:

• What the technique does
• Common procedures/tools
• Detection methods

Step 2: Develop Hunt Queries

T1003.001 - LSASS Memory Access:

metadata.event_type = "PROCESS_LAUNCH" AND
target.process.file.full_path = "C:\\Windows\\System32\\lsass.exe"

Look for suspicious parent processes accessing lsass.exe.

T1003.001 - Known Dumping Tools:

metadata.event_type = "PROCESS_LAUNCH" AND
(principal.process.command_line CONTAINS "mimikatz" OR
 principal.process.command_line CONTAINS "procdump" OR
 principal.process.command_line CONTAINS "sekurlsa")

T1555.003 - Browser Credential Files:

metadata.event_type = "FILE_OPEN" AND
(target.file.full_path CONTAINS "Login Data" OR
 target.file.full_path CONTAINS "Web Data" OR
 target.file.full_path CONTAINS "cookies.sqlite") AND
principal.process.file.full_path NOT IN ("chrome.exe", "firefox.exe", "msedge.exe")

T1003.006 - DCSync:

metadata.event_type = "DOMAIN_CONTROLLER_REPLICATION" AND
principal.hostname NOT IN @known_domain_controllers