IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Potential Credential Access via Memory Dump File Creationedit
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.*
Severity: low
Risk score: 21
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References: None
Tags:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Credential Access
- Data Source: Elastic Defend
- Rule Type: BBR
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
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.executable : (
"?:\\Windows\\System32\\WerFault.exe",
"?:\\Windows\\SysWOW64\\WerFault.exe",
"?:\\Windows\\System32\\Wermgr.exe",
"?:\\Windows\\SysWOW64\\Wermgr.exe",
"?:\\Windows\\System32\\WerFaultSecure.exe",
"?:\\Windows\\System32\\WUDFHost.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"
) 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\\*"
) and (process.code_signature.trusted == true or process.executable == null)
)
)
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
-
Technique:
- Name: OS Credential Dumping
- ID: T1003
- Reference URL: https://attack.mitre.org/techniques/T1003/
-
Sub-technique:
- Name: LSASS Memory
- ID: T1003.001
- Reference URL: https://attack.mitre.org/techniques/T1003/001/