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P4T12ICK
52 lines
1.5 KiB
YAML
52 lines
1.5 KiB
YAML
name: Suspicious Curl Network Connection
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id: 3f613dc0-21f2-4063-93b1-5d3c15eef22f
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version: 1
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date: '2021-02-22'
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author: Michael Haag, Splunk
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status: experimental
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type: TTP
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description: The following analytic identifies the use of a curl contacting suspicious
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remote domains to checkin to Command And Control servers or download further implants.
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In the context of Silver Sparrow, curl is identified contacting s3.amazonaws.com.
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This particular behavior is common with MacOS adware-malicious software.
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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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CommandLine: s3.amazonaws.com
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Image|endswith: curl
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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: Unknown. Filter as needed.
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references:
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- https://redcanary.com/blog/clipping-silver-sparrows-wings/
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- https://www.marcosantadev.com/manage-plist-files-plistbuddy/
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tags:
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analytic_story:
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- Silver Sparrow
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- Ingress Tool Transfer
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- Linux Living Off The Land
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asset_type: Endpoint
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confidence: 50
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impact: 50
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message: tbd
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mitre_attack_id:
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- T1105
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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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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: 25
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security_domain: endpoint
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