Ruben Groenewoud
2530c4d376
* [New Rule] Pluggable Authentication Module Source Download * Update persistence_pluggable_authentication_module_source_download.toml * Update rules/linux/persistence_pluggable_authentication_module_source_download.toml
73 lines
2.2 KiB
TOML
73 lines
2.2 KiB
TOML
[metadata]
|
|
creation_date = "2024/12/16"
|
|
integration = ["endpoint"]
|
|
maturity = "production"
|
|
updated_date = "2024/12/16"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
This rule detects the usage of `curl` or `wget` to download the source code of a Pluggable Authentication Module (PAM)
|
|
shared object file. Attackers may download the source code of a PAM shared object file to create a backdoor in the
|
|
authentication process.
|
|
"""
|
|
false_positives = [
|
|
"Trusted system module updates or allowed Pluggable Authentication Module (PAM) daemon configuration changes.",
|
|
]
|
|
from = "now-9m"
|
|
index = ["logs-endpoint.events.process*", "endgame-*"]
|
|
language = "eql"
|
|
license = "Elastic License v2"
|
|
name = "Pluggable Authentication Module (PAM) Source Download"
|
|
references = [
|
|
"https://github.com/zephrax/linux-pam-backdoor",
|
|
"https://github.com/eurialo/pambd",
|
|
"http://0x90909090.blogspot.com/2016/06/creating-backdoor-in-pam-in-5-line-of.html",
|
|
"https://www.trendmicro.com/en_us/research/19/i/skidmap-linux-malware-uses-rootkit-capabilities-to-hide-cryptocurrency-mining-payload.html",
|
|
]
|
|
risk_score = 21
|
|
rule_id = "53ef31ea-1f8a-493b-9614-df23d8277232"
|
|
severity = "low"
|
|
tags = [
|
|
"Domain: Endpoint",
|
|
"OS: Linux",
|
|
"Use Case: Threat Detection",
|
|
"Tactic: Credential Access",
|
|
"Tactic: Persistence",
|
|
"Data Source: Elastic Defend",
|
|
"Data Source: Elastic Endgame",
|
|
]
|
|
timestamp_override = "event.ingested"
|
|
type = "eql"
|
|
query = '''
|
|
process where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event") and
|
|
process.name in ("curl", "wget") and
|
|
process.args like~ "https://github.com/linux-pam/linux-pam/releases/download/v*/Linux-PAM-*.tar.xz"
|
|
'''
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
|
|
[[rule.threat.technique]]
|
|
id = "T1543"
|
|
name = "Create or Modify System Process"
|
|
reference = "https://attack.mitre.org/techniques/T1543/"
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0003"
|
|
name = "Persistence"
|
|
reference = "https://attack.mitre.org/tactics/TA0003/"
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
|
|
[[rule.threat.technique]]
|
|
id = "T1556"
|
|
name = "Modify Authentication Process"
|
|
reference = "https://attack.mitre.org/techniques/T1556/"
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0006"
|
|
name = "Credential Access"
|
|
reference = "https://attack.mitre.org/tactics/TA0006/"
|