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P4T12ICK
68 lines
2.2 KiB
YAML
68 lines
2.2 KiB
YAML
name: Detect Renamed 7-Zip
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id: 4057291a-b8cf-11eb-95fe-acde48001122
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version: 2
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date: '2021-09-16'
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author: Michael Haag, Splunk
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status: production
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type: Hunting
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description: The following analytic identifies renamed 7-Zip usage using Sysmon. At
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this stage of an attack, review parallel processes and file modifications for data
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that is staged or potentially have been exfiltrated. This analytic utilizes the
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OriginalFileName to capture the renamed process. During triage, validate this is
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the legitimate version of `7zip` by reviewing the PE metadata. In addition, review
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parallel processes for further suspicious behavior.
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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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Image|endswith: 7z*.exe
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OriginalFileName: 7z*.exe
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condition: (selection1)
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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.
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known_false_positives: Limited false positives, however this analytic will need to
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be modified for each environment if Sysmon is not used.
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references:
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1560.001/T1560.001.md
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tags:
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analytic_story:
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- Collection and Staging
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asset_type: Endpoint
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confidence: 90
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impact: 30
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message: The following $process_name$ has been identified as renamed, spawning from
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$parent_process_name$ on $dest$ by $user$.
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mitre_attack_id:
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- T1560.001
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- T1560
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observable:
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- name: user
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type: User
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role:
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- Victim
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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: parent_process_name
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type: Process
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role:
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- Parent Process
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- name: process_name
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type: Process
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role:
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- Child Process
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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: 27
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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/T1560.001/archive_utility/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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