Microsoft IIS Service Account Password Dumped
Elastic Stack Serverless Security
Identifies the Internet Information Services (IIS) command-line tool AppCmd being used to list passwords. An attacker with IIS web server access via a web shell can decrypt and dump the IIS AppPool service account password using AppCmd.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
Severity: high
Risk score: 73
Runs every: 5m
Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)
Maximum alerts per execution: 33
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Credential Access
Version: 5
Rule authors:
- Elastic
Rule license: Elastic License v2
If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define event.ingested and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate event.ingested to @timestamp for this rule to work.
process where event.type in ("start", "process_started") and
(process.name : "appcmd.exe" or process.pe.original_file_name == "appcmd.exe") and
process.args : "/list" and process.args : "/text*password"
Framework: MITRE ATT&CKTM
Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
Technique:
- Name: OS Credential Dumping
- ID: T1003
- Reference URL: https://attack.mitre.org/techniques/T1003/