diff --git a/rules/windows/credential_access_posh_kerb_ticket_dump.toml b/rules/windows/credential_access_posh_kerb_ticket_dump.toml new file mode 100644 index 000000000..1eea7bc0f --- /dev/null +++ b/rules/windows/credential_access_posh_kerb_ticket_dump.toml @@ -0,0 +1,99 @@ +[metadata] +creation_date = "2023/07/26" +integration = ["windows"] +maturity = "production" +min_stack_comments = "New fields added: required_fields, related_integrations, setup" +min_stack_version = "8.3.0" +updated_date = "2023/07/26" + +[rule] +author = ["Elastic"] +description = """ +Detects PowerShell scripts that have the capability of dumping Kerberos tickets from LSA, which potentially indicates an +attacker's attempt to acquire credentials for lateral movement. +""" +from = "now-9m" +index = ["winlogbeat-*", "logs-windows.*"] +language = "kuery" +license = "Elastic License v2" +name = "PowerShell Kerberos Ticket Dump" +note = """## Setup + +The 'PowerShell Script Block Logging' logging policy must be enabled. +Steps to implement the logging policy with Advanced Audit Configuration: + +``` +Computer Configuration > +Administrative Templates > +Windows PowerShell > +Turn on PowerShell Script Block Logging (Enable) +``` + +Steps to implement the logging policy via registry: + +``` +reg add "hklm\\SOFTWARE\\Policies\\Microsoft\\Windows\\PowerShell\\ScriptBlockLogging" /v EnableScriptBlockLogging /t REG_DWORD /d 1 +``` +""" +references = [ + "https://github.com/MzHmO/PowershellKerberos/blob/main/dumper.ps1", +] +risk_score = 47 +rule_id = "fddff193-48a3-484d-8d35-90bb3d323a56" +severity = "medium" +tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Credential Access", "Data Source: PowerShell Logs"] +timestamp_override = "event.ingested" +type = "query" + +query = ''' +event.category:process and host.os.type:windows and + powershell.file.script_block_text : ( + "LsaCallAuthenticationPackage" and + ( + "KerbRetrieveEncodedTicketMessage" or + "KerbQueryTicketCacheMessage" or + "KerbQueryTicketCacheExMessage" or + "KerbQueryTicketCacheEx2Message" or + "KerbRetrieveTicketMessage" or + "KerbDecryptDataMessage" + ) + ) +''' + + +[[rule.threat]] +framework = "MITRE ATT&CK" +[[rule.threat.technique]] +id = "T1003" +name = "OS Credential Dumping" +reference = "https://attack.mitre.org/techniques/T1003/" + +[[rule.threat.technique]] +id = "T1558" +name = "Steal or Forge Kerberos Tickets" +reference = "https://attack.mitre.org/techniques/T1558/" + + + +[rule.threat.tactic] +id = "TA0006" +name = "Credential Access" +reference = "https://attack.mitre.org/tactics/TA0006/" +[[rule.threat]] +framework = "MITRE ATT&CK" +[[rule.threat.technique]] +id = "T1059" +name = "Command and Scripting Interpreter" +reference = "https://attack.mitre.org/techniques/T1059/" +[[rule.threat.technique.subtechnique]] +id = "T1059.001" +name = "PowerShell" +reference = "https://attack.mitre.org/techniques/T1059/001/" + + + +[rule.threat.tactic] +id = "TA0002" +name = "Execution" +reference = "https://attack.mitre.org/tactics/TA0002/" +