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https://github.com/splunk/security_content
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Michael Haag
65 lines
2.6 KiB
YAML
65 lines
2.6 KiB
YAML
name: Windows PowerShell Disable HTTP Logging
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id: 27958de0-2857-43ca-9d4c-b255cf59dcab
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version: 1
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date: '2022-12-21'
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author: Michael Haag, Splunk
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type: TTP
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datamodel: []
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description: The following analtyic identifies the use of get-WebConfigurationProperty and Set-ItemProperty attempting to disable HTTP logging on windows via PowerShell.
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Adversaries may perform this action to disable HTTP logging to cover tracks and delete logs on disk.
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search: '`powershell` EventCode=4104 ScriptBlockText IN("*get-WebConfigurationProperty*","*Set-ItemProperty*") AND ScriptBlockText IN ("*httpLogging*","*Logfile.enabled*") AND ScriptBlockText IN ("*dontLog*", "*false*") | stats count min(_time) as firstTime max(_time) as lastTime by EventCode ScriptBlockText Computer user_id
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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| `windows_powershell_disable_http_logging_filter`'
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how_to_implement: To successfully implement this analytic, you will need to enable
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PowerShell Script Block Logging on some or all endpoints. Additional setup here
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https://docs.splunk.com/Documentation/UBA/5.0.4.1/GetDataIn/AddPowerShell#Configure_module_logging_for_PowerShell.
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known_false_positives: It is possible administrators or scripts may run these commands, filtering may be required.
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references:
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- https://www.microsoft.com/en-us/security/blog/2022/12/12/iis-modules-the-evolution-of-web-shells-and-how-to-detect-them/
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- https://www.crowdstrike.com/wp-content/uploads/2022/05/crowdstrike-iceapple-a-novel-internet-information-services-post-exploitation-framework-1.pdf
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- https://unit42.paloaltonetworks.com/unit42-oilrig-uses-rgdoor-iis-backdoor-targets-middle-east/
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- https://www.secureworks.com/research/bronze-union
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tags:
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analytic_story:
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- IIS Components
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- Windows Defense Evasion Tactics
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asset_type: Endpoint
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cis20:
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- CIS 3
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- CIS 5
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- CIS 16
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confidence: 80
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context:
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- Source:Endpoint
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- Stage:Defense Evasion
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1505.004/4104_disable_http_logging_windows-powershell.log
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impact: 80
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kill_chain_phases:
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- Actions on Objectives
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message: A PowerShell Cmdlet related to disable or modifying a IIS HTTP logging has occurred on $Computer$.
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mitre_attack_id:
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- T1562
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- T1562.002
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- T1505
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- T1505.004
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nist:
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- DE.CM
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observable:
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- name: Computer
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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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required_fields:
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- _time
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- ScriptBlockText
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- Computer
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- EventCode
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risk_score: 64
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security_domain: endpoint
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