atomic-threat-coverage/Atomic_Threat_Coverage/Detection_Rules/sysmon_cmdkey_recon.md

Title	Cmdkey Cached Credentials Recon
Description	Detects usage of cmdkey to look for cached credentials
ATT&CK Tactic
ATT&CK Technique
Data Needed	DN_0003_1_windows_sysmon_process_creation
Trigger	There is no Trigger for this technique yet.
Severity Level	low
False Positives	Legitimate administrative tasks.
Development Status	experimental
References
Author	jmallette

Detection Rules

Sigma rule

title: Cmdkey Cached Credentials Recon
status: experimental
description: Detects usage of cmdkey to look for cached credentials
reference: 
    - https://www.peew.pw/blog/2017/11/26/exploring-cmdkey-an-edge-case-for-privilege-escalation
    - https://technet.microsoft.com/en-us/library/cc754243(v=ws.11).aspx
author: jmallette
logsource:
    product: windows
    service: sysmon
detection:
    selection:
        EventID: 1
        Image: '*\cmdkey.exe'
        CommandLine: '* /list *'
    condition: selection
fields:
    - CommandLine
    - ParentCommandLine
    - User
falsepositives:
    - Legitimate administrative tasks.
level: low

Kibana query

(EventID:"1" AND Image.keyword:*\\\\cmdkey.exe AND CommandLine.keyword:*\\ \\/list\\ *)

X-Pack Watcher

curl -s -XPUT -H \'Content-Type: application/json\' --data-binary @- localhost:9200/_xpack/watcher/watch/Cmdkey-Cached-Credentials-Recon <<EOF\n{\n  "trigger": {\n    "schedule": {\n      "interval": "30m"\n    }\n  },\n  "input": {\n    "search": {\n      "request": {\n        "body": {\n          "size": 0,\n          "query": {\n            "query_string": {\n              "query": "(EventID:\\"1\\" AND Image.keyword:*\\\\\\\\cmdkey.exe AND CommandLine.keyword:*\\\\ \\\\/list\\\\ *)",\n              "analyze_wildcard": true\n            }\n          }\n        },\n        "indices": []\n      }\n    }\n  },\n  "condition": {\n    "compare": {\n      "ctx.payload.hits.total": {\n        "not_eq": 0\n      }\n    }\n  },\n  "actions": {\n    "send_email": {\n      "email": {\n        "to": null,\n        "subject": "Sigma Rule \'Cmdkey Cached Credentials Recon\'",\n        "body": "Hits:\\n{{#ctx.payload.hits.hits}}Hit on {{_source.@timestamp}}:\\n      CommandLine = {{_source.CommandLine}}\\nParentCommandLine = {{_source.ParentCommandLine}}\\n             User = {{_source.User}}================================================================================\\n{{/ctx.payload.hits.hits}}",\n        "attachments": {\n          "data.json": {\n            "data": {\n              "format": "json"\n            }\n          }\n        }\n      }\n    }\n  }\n}\nEOF\n

Graylog

(EventID:"1" AND Image:"*\\\\cmdkey.exe" AND CommandLine:"* \\/list *")