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P4T12ICK
79 lines
2.5 KiB
YAML
79 lines
2.5 KiB
YAML
name: CMD Echo Pipe - Escalation
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id: eb277ba0-b96b-11eb-b00e-acde48001122
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version: 2
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date: '2021-05-20'
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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: This analytic identifies a common behavior by Cobalt Strike and other
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frameworks where the adversary will escalate privileges, either via `jump` (Cobalt
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Strike PTH) or `getsystem`, using named-pipe impersonation. A suspicious event will
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look like `cmd.exe /c echo 4sgryt3436 > \\.\Pipe\5erg53`.
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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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OriginalFileName: Cmd.Exe
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selection2:
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Image|endswith: cmd.exe
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selection3:
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CommandLine: '*%comspec%*'
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selection4:
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CommandLine: '*pipe*'
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selection5:
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CommandLine: '*echo*'
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condition: (selection1 or selection2) or selection3 or selection4 or selection5
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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: Unknown. It is possible filtering may be required to ensure
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fidelity.
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references:
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- https://redcanary.com/threat-detection-report/threats/cobalt-strike/
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- https://github.com/rapid7/meterpreter/blob/master/source/extensions/priv/server/elevate/namedpipe.c
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tags:
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analytic_story:
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- Cobalt Strike
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asset_type: Endpoint
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confidence: 80
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impact: 80
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message: An instance of $parent_process_name$ spawning $process_name$ was identified
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on endpoint $dest$ by user $user$ potentially performing privilege escalation
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using named pipes related to Cobalt Strike and other frameworks.
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mitre_attack_id:
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- T1059
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- T1059.003
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- T1543.003
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- T1543
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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: 64
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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/T1055/cobalt_strike/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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