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P4T12ICK
75 lines
2.6 KiB
YAML
75 lines
2.6 KiB
YAML
name: Office Product Spawning MSHTA
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id: 6078fa20-a6d2-11eb-b662-acde48001122
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version: 2
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date: '2021-04-26'
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author: Michael Haag, Splunk
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status: production
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type: TTP
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description: The following detection identifies the latest behavior utilized by different
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malware families (including TA551, IcedID). This detection identifies any Windows
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Office Product spawning `mshta.exe`. In malicious instances, the command-line of
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`mshta.exe` will contain the `hta` file locally, or a URL to the remote destination.
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In addition, Threat Research has released a detections identifying suspicious use
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of `mshta.exe`. In this instance, we narrow our detection down to the Office suite
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as a parent process. During triage, review all file modifications. Capture and analyze
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any artifacts on disk. The Office Product, or `mshta.exe` will have reached out
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to a remote destination, capture and block the IPs or domain. Review additional
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parallel processes for further activity.
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data_source:
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- Sysmon Event ID 1
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search:
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selection1:
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ParentImage:
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- winword.exe
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- excel.exe
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- powerpnt.exe
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- mspub.exe
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- visio.exe
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selection2:
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OriginalFileName: MSHTA.EXE
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selection3:
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Image|endswith: mshta.exe
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condition: selection1 and selection2 and selection3
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how_to_implement: To successfully implement this search you need to be ingesting information
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on process that include the name of the process responsible for the changes from
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your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition,
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confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
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endpoint product.
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known_false_positives: No false positives known. Filter as needed.
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references:
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- https://redcanary.com/threat-detection-report/threats/TA551/
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tags:
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analytic_story:
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- Spearphishing Attachments
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- IcedID
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- Azorult
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asset_type: Endpoint
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confidence: 90
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impact: 70
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message: office parent process $parent_process_name$ will execute a suspicious child
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process $process_name$ with process id $process_id$ in host $dest$
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mitre_attack_id:
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- T1566
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- T1566.001
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observable:
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- name: dest
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type: Hostname
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role:
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- Victim
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- name: process_name
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type: Process
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role:
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- Attacker
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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risk_score: 63
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security_domain: endpoint
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tests:
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- name: True Positive Test
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attack_data:
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1566.001/macro/windows-sysmon_macros.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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