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Anthropic-Cybersecurity-Skills/skills/detecting-credential-dumping-with-edr.bak/references/api-reference.md
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mukul975 c47eed6a64 Production hardening: security fixes, code quality, 724 skills complete
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2026-03-19 13:26:49 +01:00

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API Reference: Detecting Credential Dumping with EDR

T1003 Sub-Techniques

Sub-technique Method Key Evidence
T1003.001 LSASS Memory Sysmon Event ID 10, GrantedAccess mask
T1003.002 SAM Registry reg.exe save HKLM\SAM, Event ID 4656
T1003.003 NTDS.dit vssadmin shadow copy, ntdsutil ifm
T1003.004 LSA Secrets Registry HKLM\SECURITY
T1003.005 Cached Creds DCC2 hashes in SECURITY hive
T1003.006 DCSync Event ID 4662, replication GUIDs

python-evtx Library

import Evtx.Evtx as evtx

with evtx.Evtx("Sysmon.evtx") as log:
    for record in log.records():
        xml = record.xml()
        # Parse EventID, SourceImage, TargetImage, GrantedAccess

LSASS Suspicious Access Masks

GrantedAccess Meaning
0x1010 PROCESS_VM_READ + QUERY_INFO (Mimikatz)
0x1038 VM_READ + QUERY_INFO + VM_WRITE
0x1FFFFF PROCESS_ALL_ACCESS

DCSync Replication GUIDs

DS-Replication-Get-Changes:             1131f6aa-9c07-11d1-f79f-00c04fc2dcd2
DS-Replication-Get-Changes-All:         1131f6ad-9c07-11d1-f79f-00c04fc2dcd2
DS-Replication-Get-Changes-In-Filtered: 89e95b76-444d-4c62-991a-0facbeda640c

Splunk SPL - LSASS Access Detection

index=sysmon EventCode=10 TargetImage="*\\lsass.exe"
| where NOT match(SourceImage, "(csrss|services|svchost|lsm|MsMpEng)\\.exe$")
| where GrantedAccess IN ("0x1010", "0x1038", "0x1FFFFF")
| table _time SourceImage GrantedAccess Computer SourceUser

KQL - Microsoft Defender for Endpoint

DeviceProcessEvents
| where FileName in ("mimikatz.exe", "procdump.exe", "nanodump.exe")
   or ProcessCommandLine has_any ("sekurlsa", "lsadump", "MiniDump")
| project Timestamp, DeviceName, FileName, ProcessCommandLine, AccountName

CLI Usage

python agent.py --sysmon-log Sysmon.evtx
python agent.py --security-log Security.evtx
python agent.py --command-log process_audit.log