detecting-t1003-credential-dumping-with-edr

name	detecting-t1003-credential-dumping-with-edr
description	Detect OS credential dumping techniques targeting LSASS memory, SAM database, NTDS.dit, and cached credentials using EDR telemetry, Sysmon process access monitoring, and Windows security event correlation.
domain	cybersecurity
subdomain	threat-hunting
tags	["threat-hunting","credential-dumping","lsass","mitre-t1003","edr","mimikatz","ntds","sam-database"]
version	1.0
author	mahipal
license	Apache-2.0
d3fend_techniques	["Token Binding","Execution Isolation","File Metadata Consistency Validation","Restore Access","Application Protocol Command Analysis"]
nist_csf	["DE.CM-01","DE.AE-02","DE.AE-07","ID.RA-05"]
mitre_attack	["T1003.001","T1003.002","T1003.003","T1003.006"]
source	https://github.com/mukul975/Anthropic-Cybersecurity-Skills
source_commit	04450304b12645cb2b974ab96d28c0664758a88d

Detecting T1003 Credential Dumping with EDR

When to Use

• When hunting for credential theft activity in the environment
• After compromise indicators suggest attacker has elevated privileges
• When EDR alerts fire for LSASS access or suspicious process memory reads
• During incident response to determine scope of credential compromise
• When auditing LSASS protection controls (Credential Guard, RunAsPPL)

Prerequisites

• EDR agent deployed with LSASS access monitoring (CrowdStrike, Defender for Endpoint, SentinelOne)
• Sysmon Event ID 10 (ProcessAccess) with LSASS-specific filters
• Windows Security Event ID 4656/4663 (Object Access Auditing)
• LSASS SACL auditing enabled (Windows 10+)
• Registry auditing for SAM hive access

Workflow

1. Monitor LSASS Process Access: Track all processes opening handles to lsass.exe with suspicious access rights (PROCESS_VM_READ 0x0010, PROCESS_ALL_ACCESS 0x1FFFFF). Non-privileged or unusual processes accessing LSASS are strong indicators.
2. Detect Credential Dumping Tools: Hunt for known tool signatures -- Mimikatz (sekurlsa::logonpasswords), procdump.exe targeting LSASS, comsvcs.dll MiniDump, and Task Manager creating LSASS dumps.
3. Monitor NTDS.dit Access: Detect Volume Shadow Copy creation (vssadmin, wmic shadowcopy) followed by NTDS.dit file access, or ntdsutil.exe IFM creation.
4. Track SAM/SECURITY/SYSTEM Hive Access: Hunt for reg.exe save commands targeting SAM, SECURITY, and SYSTEM registry hives.
5. Detect DCSync Activity: Monitor for non-DC accounts requesting directory replication (Event 4662 with replication GUIDs).
6. Correlate with Lateral Movement: After credential dumping, attackers typically move laterally. Correlate credential access events with subsequent remote logon attempts.
7. Assess Impact: Determine which credentials were potentially compromised and initiate password resets.

Key Concepts

Concept	Description
T1003.001	LSASS Memory -- dumping credentials from LSASS process
T1003.002	Security Account Manager -- extracting local account hashes from SAM
T1003.003	NTDS -- extracting domain hashes from Active Directory database
T1003.004	LSA Secrets -- extracting service account passwords