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will be released for this version. For the latest information, see the
current release documentation.
Potential Credential Access via Renamed COM+ Services DLL
editPotential Credential Access via Renamed COM+ Services DLL
editIdentifies suspicious renamed COMSVCS.DLL Image Load, which exports the MiniDump function that can be used to dump a process memory. This may indicate an attempt to dump LSASS memory while bypassing command-line based detection in preparation for credential access.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-windows.*
Severity: high
Risk score: 73
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Credential Access
- Tactic: Defense Evasion
- Data Source: Sysmon Only
Version: 106
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editsequence by process.entity_id with maxspan=1m
[process where host.os.type == "windows" and event.category == "process" and
process.name : "rundll32.exe"]
[process where host.os.type == "windows" and event.category == "process" and event.dataset : "windows.sysmon_operational" and event.code == "7" and
(file.pe.original_file_name : "COMSVCS.DLL" or file.pe.imphash : "EADBCCBB324829ACB5F2BBE87E5549A8") and
/* renamed COMSVCS */
not file.name : "COMSVCS.DLL"]
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/
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: System Binary Proxy Execution
- ID: T1218
- Reference URL: https://attack.mitre.org/techniques/T1218/
-
Sub-technique:
- Name: Rundll32
- ID: T1218.011
- Reference URL: https://attack.mitre.org/techniques/T1218/011/