Microsoft IIS Service Account Password Dumped

 1[metadata]
 2creation_date = "2020/08/18"
 3integration = ["endpoint", "windows", "system"]
 4maturity = "production"
 5updated_date = "2024/05/21"
 6
 7[rule]
 8author = ["Elastic"]
 9description = """
10Identifies the Internet Information Services (IIS) command-line tool, AppCmd, being used to list passwords. An attacker
11with IIS web server access via a web shell can decrypt and dump the IIS AppPool service account password using AppCmd.
12"""
13from = "now-9m"
14index = [
15    "winlogbeat-*",
16    "logs-endpoint.events.process-*",
17    "logs-windows.*",
18    "endgame-*",
19    "logs-system.security*",
20]
21language = "eql"
22license = "Elastic License v2"
23max_signals = 33
24name = "Microsoft IIS Service Account Password Dumped"
25references = ["https://blog.netspi.com/decrypting-iis-passwords-to-break-out-of-the-dmz-part-1/"]
26risk_score = 73
27rule_id = "0564fb9d-90b9-4234-a411-82a546dc1343"
28setup = """## Setup
29
30If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2,
31events will not define `event.ingested` and default fallback for EQL rules was not added until version 8.2.
32Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
33`event.ingested` to @timestamp.
34For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
35"""
36severity = "high"
37tags = [
38    "Domain: Endpoint",
39    "OS: Windows",
40    "Use Case: Threat Detection",
41    "Tactic: Credential Access",
42    "Data Source: Elastic Endgame",
43    "Data Source: Elastic Defend",
44]
45timestamp_override = "event.ingested"
46type = "eql"
47
48query = '''
49process where host.os.type == "windows" and event.type == "start" and
50   (process.name : "appcmd.exe" or ?process.pe.original_file_name == "appcmd.exe") and
51   process.args : "/list" and process.args : "/text*password"
52'''
53
54
55[[rule.threat]]
56framework = "MITRE ATT&CK"
57[[rule.threat.technique]]
58id = "T1003"
59name = "OS Credential Dumping"
60reference = "https://attack.mitre.org/techniques/T1003/"
61
62
63[rule.threat.tactic]
64id = "TA0006"
65name = "Credential Access"
66reference = "https://attack.mitre.org/tactics/TA0006/"