Suspicious macOS MS Office Child Processedit
Identifies suspicious child processes of frequently targeted Microsoft Office applications (Word, PowerPoint, and Excel). These child processes are often launched during exploitation of Office applications or by documents with malicious macros.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
Severity: medium
Risk score: 47
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- macOS
- Threat Detection
- Initial Access
Version: 101
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
process where event.type in ("start", "process_started") and
process.parent.name:("Microsoft Word", "Microsoft PowerPoint", "Microsoft Excel") and
process.name:
(
"bash",
"dash",
"sh",
"tcsh",
"csh",
"zsh",
"ksh",
"fish",
"python*",
"perl*",
"php*",
"osascript",
"pwsh",
"curl",
"wget",
"cp",
"mv",
"base64",
"launchctl"
) and
/* noisy false positives related to product version discovery and office errors reporting */
not process.args:
(
"ProductVersion",
"hw.model",
"ioreg",
"ProductName",
"ProductUserVisibleVersion",
"ProductBuildVersion",
"/Library/Application Support/Microsoft/MERP*/Microsoft Error Reporting.app/Contents/MacOS/Microsoft Error Reporting"
)
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Initial Access
- ID: TA0001
- Reference URL: https://attack.mitre.org/tactics/TA0001/
-
Technique:
- Name: Phishing
- ID: T1566
- Reference URL: https://attack.mitre.org/techniques/T1566/
-
Sub-technique:
- Name: Spearphishing Attachment
- ID: T1566.001
- Reference URL: https://attack.mitre.org/techniques/T1566/001/