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« Potential Credential Access via Renamed COM+ Services DLL Potential DLL Side-Loading via Microsoft Antimalware Service Executable »

Potential Credential Access via Windows Utilitiesedit

Identifies the execution of known Windows utilities often abused to dump LSASS memory or the Active Directory database (NTDS.dit) in preparation for credential access.

Rule type: eql

Rule indices:

  • winlogbeat-*
  • logs-endpoint.events.*
  • logs-windows.*

Severity: high

Risk score: 73

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Credential Access

Version: 6 (version history)

Added (Elastic Stack release): 7.11.0

Last modified (Elastic Stack release): 8.2.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guideedit

## Config

If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.

Rule queryedit

process where event.type in ("start", "process_started") and /* update
here with any new lolbas with dump capability */
(process.pe.original_file_name == "procdump" and process.args : "-ma")
or (process.name : "ProcessDump.exe" and not process.parent.executable
regex~ """C:\\Program Files( \(x86\))?\\Cisco Systems\\.*""") or
(process.pe.original_file_name == "WriteMiniDump.exe" and not
process.parent.executable regex~ """C:\\Program Files(
\(x86\))?\\Steam\\.*""") or (process.pe.original_file_name ==
"RUNDLL32.EXE" and (process.args : "MiniDump*" or process.command_line
: "*comsvcs.dll*#24*")) or (process.pe.original_file_name ==
"RdrLeakDiag.exe" and process.args : "/fullmemdmp") or
(process.pe.original_file_name == "SqlDumper.exe" and process.args :
"0x01100*") or (process.pe.original_file_name == "TTTracer.exe" and
process.args : "-dumpFull" and process.args : "-attach") or
(process.pe.original_file_name == "ntdsutil.exe" and process.args :
"create*full*") or (process.pe.original_file_name == "diskshadow.exe"
and process.args : "/s")

Threat mappingedit

Framework: MITRE ATT&CKTM

Rule version historyedit

Version 6 (8.2.0 release)
  • Formatting only
Version 5 (7.16.0 release)
  • Formatting only
Version 4 (7.14.0 release)

  • Updated query, changed from:

    process where event.type in ("start", "process_started") and /* update
here with any new lolbas with dump capability */
(process.pe.original_file_name == "procdump" and process.args : "-ma")
or (process.name : "ProcessDump.exe" and not process.parent.executable
: "C:\\Program Files*\\Cisco Systems\\*.exe") or
(process.pe.original_file_name == "WriteMiniDump.exe" and not
process.parent.executable : "C:\\Program Files*\\Steam\\*.exe") or
(process.pe.original_file_name == "RUNDLL32.EXE" and (process.args :
"MiniDump*" or process.command_line : "*comsvcs.dll*#24*")) or
(process.pe.original_file_name == "RdrLeakDiag.exe" and process.args :
"/fullmemdmp") or (process.pe.original_file_name == "SqlDumper.exe"
and process.args : "0x01100*") or (process.pe.original_file_name ==
"TTTracer.exe" and process.args : "-dumpFull" and process.args :
"-attach") or (process.pe.original_file_name == "ntdsutil.exe" and
process.args : "create*full*") or (process.pe.original_file_name ==
"diskshadow.exe" and process.args : "/s")
Version 3 (7.12.0 release)
  • Formatting only
Version 2 (7.11.2 release)
  • Formatting only
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