LSASS Credential Dumping with Procdump

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Id	c332b840-61e4-462e-a201-0e2d69bad45d
Rulename	LSASS Credential Dumping with Procdump
Description	This query was originally published in the threat analytics report, “Exchange Server zero-days exploited in the wild”. In early March 2021, Microsoft released patches for four different zero-day vulnerabilities affecting Microsoft Exchange Server. The vulnerabilities were being used in a coordinated attack. For more information on the vulnerabilities, visit the following links: 1. CVE-2021-26855 2. CVE-2021-26857 3. CVE-2021-26858 4. CVE-2021-27065 The following query looks for evidence of Procdump being used to dump credentials from LSASS, the Local Security Authentication Server. This might indicate an attacker has compromised user accounts. More queries related to this threat can be found under the See also section of this page. Reference - https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/
Severity	High
Tactics	CredentialAccess
Techniques	T1003
Required data connectors	MicrosoftThreatProtection
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/Credential Access/LSASSCredDumpProcdump.yaml
Version	1.0.0
Arm template	c332b840-61e4-462e-a201-0e2d69bad45d.json

KQL

DeviceProcessEvents 
| where (FileName has_any ("procdump.exe", "procdump64.exe") and ProcessCommandLine has "lsass") or 
// Looking for Accepteula flag or Write a dump file with all process memory
(ProcessCommandLine has "lsass.exe" and (ProcessCommandLine has "-accepteula" or ProcessCommandLine contains "-ma"))
| extend HostName = iff(DeviceName has '.', substring(DeviceName, 0, indexof(DeviceName, '.')), DeviceName)
| extend DnsDomain = iff(DeviceName has '.', substring(DeviceName, indexof(DeviceName, '.') + 1), "")

YAML

tags:
- Exchange Server
- Zero-day
- Procdump
- Credential Dumping
- LSASS
entityMappings:
- entityType: Host
  fieldMappings:
  - identifier: FullName
    columnName: DeviceName
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: DnsDomain
tactics:
- CredentialAccess
requiredDataConnectors:
- dataTypes:
  - DeviceProcessEvents
  connectorId: MicrosoftThreatProtection
id: c332b840-61e4-462e-a201-0e2d69bad45d
severity: High
status: Available
query: |
  DeviceProcessEvents 
  | where (FileName has_any ("procdump.exe", "procdump64.exe") and ProcessCommandLine has "lsass") or 
  // Looking for Accepteula flag or Write a dump file with all process memory
  (ProcessCommandLine has "lsass.exe" and (ProcessCommandLine has "-accepteula" or ProcessCommandLine contains "-ma"))
  | extend HostName = iff(DeviceName has '.', substring(DeviceName, 0, indexof(DeviceName, '.')), DeviceName)
  | extend DnsDomain = iff(DeviceName has '.', substring(DeviceName, indexof(DeviceName, '.') + 1), "")  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/Credential Access/LSASSCredDumpProcdump.yaml
kind: Scheduled
queryPeriod: 1h
version: 1.0.0
name: LSASS Credential Dumping with Procdump
queryFrequency: 1h
triggerThreshold: 0
relevantTechniques:
- T1003
description: |
  This query was originally published in the threat analytics report, "Exchange Server zero-days exploited in the wild".
  In early March 2021, Microsoft released patches for four different zero-day vulnerabilities affecting Microsoft Exchange Server. The vulnerabilities were being used in a coordinated attack. For more information on the vulnerabilities, visit the following links:
  1. CVE-2021-26855
  2. CVE-2021-26857
  3. CVE-2021-26858
  4. CVE-2021-27065
  The following query looks for evidence of Procdump being used to dump credentials from LSASS, the Local Security Authentication Server. This might indicate an attacker has compromised user accounts.
  More queries related to this threat can be found under the See also section of this page.
  Reference - https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/  
triggerOperator: gt

ARM