---
title: Potential Credential Access via Memory Dump File Creation
description: Identifies the creation or modification of a medium size memory dump file which can indicate an attempt to access credentials from a process memory. Rule...
url: https://www.elastic.co/docs/reference/security/prebuilt-rules/rules_building_block/credential_access_mdmp_file_creation
products:
  - Elastic Security
---

# Potential Credential Access via Memory Dump File Creation
Identifies the creation or modification of a medium size memory dump file which can indicate an attempt to access
credentials from a process memory.
**Rule type**: eql
**Rule indices**:
- logs-endpoint.events.file-*

**Rule Severity**: low
**Risk Score**: 21
**Runs every**: 
**Searches indices from**: `now-9m`
**Maximum alerts per execution**: 100
**References**:
**Tags**:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Credential Access
- Data Source: Elastic Defend
- Rule Type: BBR
- Rule Type: Event Correlation (EQL)
- Platform: Windows

**Version**: 7
**Rule authors**:
- Elastic

**Rule license**: Elastic License v2

## Rule Query

```eql
file where host.os.type == "windows" and event.type == "creation" and

  /* MDMP header */
  file.Ext.header_bytes : "4d444d50*" and file.size >= 30000 and
  not

  (
    (
      process.name : "System" or
      process.executable : (
        "?:\\Windows\\System32\\WerFault.exe",
        "?:\\Windows\\SysWOW64\\WerFault.exe",
        "?:\\Windows\\System32\\Wermgr.exe",
        "?:\\Windows\\SysWOW64\\Wermgr.exe",
        "?:\\Windows\\System32\\WerFaultSecure.exe",
        "?:\\Windows\\SysWOW64\\WerFaultSecure.exe",
        "?:\\Windows\\System32\\WUDFHost.exe",
        "C:\\Windows\\System32\\rdrleakdiag.exe",
        "?:\\Windows\\System32\\Taskmgr.exe",
        "?:\\Windows\\SysWOW64\\Taskmgr.exe",
        "?:\\Program Files\\*.exe",
        "?:\\Program Files (x86)\\*.exe",
        "?:\\Windows\\SystemApps\\*.exe",
        "?:\\Users\\*\\AppData\\Roaming\\Zoom\\bin\\zCrashReport64.exe",
        "?:\\Windows\\CCM\\ccmdump.exe",
        "?:\\$WINDOWS.~BT\\Sources\\SetupHost.exe"
      ) and process.code_signature.trusted == true
    ) or
    (
      file.path : (
        "?:\\ProgramData\\Microsoft\\Windows\\WER\\*",
        "?:\\ProgramData\\Microsoft\\WDF\\*",
        "?:\\ProgramData\\Alteryx\\ErrorLogs\\*",
        "?:\\ProgramData\\Goodix\\*",
        "?:\\Windows\\system32\\config\\systemprofile\\AppData\\Local\\CrashDumps\\*",
        "?:\\Users\\*\\AppData\\Roaming\\Zoom\\logs\\zoomcrash*",
        "?:\\Users\\*\\AppData\\*\\Crashpad\\*",
        "?:\\Users\\*\\AppData\\*\\crashpaddb\\*",
        "?:\\Users\\*\\AppData\\*\\HungReports\\*",
        "?:\\Users\\*\\AppData\\*\\CrashDumps\\*",
        "?:\\Users\\*\\AppData\\*\\NativeCrashReporting\\*",
        "?:\\Program Files (x86)\\*\\Crashpad\\*",
        "?:\\Program Files\\*\\Crashpad\\*"
      ) and (process.code_signature.trusted == true or process.executable == null)
    )
  )
```

**Framework:** MITRE ATT&CK
- Tactic:
  - Name: Credential Access
  - Id: TA0006
  - Reference URL: [[https://attack.mitre.org/tactics/TA0006/](https://attack.mitre.org/tactics/TA0006/)](https://attack.mitre.org/tactics/TA0006/)
- Technique:
  - Name: OS Credential Dumping
  - Id: T1003
  - Reference URL: [[https://attack.mitre.org/techniques/T1003/](https://attack.mitre.org/techniques/T1003/)](https://attack.mitre.org/techniques/T1003/)
- Sub Technique:
  - Name: LSASS Memory
  - Id: T1003.001
  - Reference URL: [[https://attack.mitre.org/techniques/T1003/001/](https://attack.mitre.org/techniques/T1003/001/)](https://attack.mitre.org/techniques/T1003/001/)