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59 lines
2.5 KiB
YAML
59 lines
2.5 KiB
YAML
name: Credential Extraction indicative of use of PowerSploit modules
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id: 5f1186a4-e681-446e-851c-dc9574ad28eb
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version: 1
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date: '2020-10-21'
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author: Stanislav Miskovic, Splunk
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type: streaming
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datamodel: []
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description: Credential extraction is often an illegal recovery of credential material
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from secured authentication resources and repositories. This process may also involve
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decryption or other transformations of the stored credential material. PowerSploit
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is a collection of Microsoft PowerShell modules commonly employed in exploits.
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search: '| from read_ssa_enriched_events()
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| eval timestamp=parse_long(ucast(map_get(input_event, "_time"), "string", null)),
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cmd_line=ucast(map_get(input_event, "process"), "string", null), event_id=ucast(map_get(input_event,
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"event_id"), "string", null) | where cmd_line != null AND ( match_regex(cmd_line,
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/(?i)Get-ApplicationHost/)=true OR match_regex(cmd_line, /(?i)Get-CachedGPPPassword/)=true
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OR match_regex(cmd_line, /(?i)Get-GPPAutologon/)=true OR match_regex(cmd_line, /(?i)Get-GPPPassword/)=true
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OR match_regex(cmd_line, /(?i)Get-RegistryAutoLogon/)=true OR match_regex(cmd_line,
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/(?i)Get-SiteListPassword/)=true OR match_regex(cmd_line, /(?i)Get-SPNTicket/)=true
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OR match_regex(cmd_line, /(?i)Request-SPNTicket/)=true OR match_regex(cmd_line,
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/(?i)Get-VaultCredential/)=true OR match_regex(cmd_line, /(?i)Invoke-Kerberoast/)=true
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)
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| eval start_time = timestamp, end_time = timestamp, entities = mvappend( ucast(map_get(input_event,
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"dest_user_id"), "string", null), ucast(map_get(input_event, "dest_device_id"),
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"string", null)), body=create_map(["event_id", event_id, "cmd_line", cmd_line])
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| into write_ssa_detected_events();'
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how_to_implement: You must be ingesting Windows Security logs from devices of interest,
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including the event ID 4688 with enabled command line logging.
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known_false_positives: None identified.
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references:
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- https://github.com/PowerShellMafia/PowerSploit
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tags:
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analytic_story:
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- Credential Dumping
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- Malicious PowerShell
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asset_type: Windows
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cis20:
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- CIS 16
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1003/credential_extraction/logAllPowerSploitModulesWithOldNames.log
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kill_chain_phases:
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- Actions on Objectives
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mitre_attack_id:
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- T1003
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nist:
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- PR.AC
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- PR.IP
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product:
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- Splunk Behavioral Analytics
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required_fields:
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- dest_device_id
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- dest_user_id
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- process
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- _time
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risk_severity: high
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security_domain: endpoint
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