Jonhnathan
b4c84e8a40
* Update Tags * Bump updated date separately to be easy to revert if needed * Update resource_development_ml_linux_anomalous_compiler_activity.toml * Apply changes from the discussion * Update persistence_init_d_file_creation.toml * Update defense_evasion_timestomp_sysmon.toml * Update defense_evasion_application_removed_from_blocklist_in_google_workspace.toml * Update missing Tactic tags * Update unit tests to match new tags * Add missing IG tags * Delete okta_threat_detected_by_okta_threatinsight.toml * Update command_and_control_google_drive_malicious_file_download.toml * Update persistence_rc_script_creation.toml * Mass bump * Update persistence_shell_activity_by_web_server.toml * . --------- Co-authored-by: Mika Ayenson <Mika.ayenson@elastic.co> Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
80 lines
2.7 KiB
TOML
80 lines
2.7 KiB
TOML
[metadata]
|
|
creation_date = "2020/12/23"
|
|
integration = ["endpoint"]
|
|
maturity = "production"
|
|
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
|
|
min_stack_version = "8.3.0"
|
|
updated_date = "2023/06/22"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Identifies the execution of a suspicious browser child process. Adversaries may gain access to a system through a user
|
|
visiting a website over the normal course of browsing. With this technique, the user's web browser is typically targeted
|
|
for exploitation.
|
|
"""
|
|
from = "now-9m"
|
|
index = ["logs-endpoint.events.*"]
|
|
language = "eql"
|
|
license = "Elastic License v2"
|
|
name = "Suspicious Browser Child Process"
|
|
references = [
|
|
"https://objective-see.com/blog/blog_0x43.html",
|
|
"https://fr.slideshare.net/codeblue_jp/cb19-recent-apt-attack-on-crypto-exchange-employees-by-heungsoo-kang",
|
|
]
|
|
risk_score = 73
|
|
rule_id = "080bc66a-5d56-4d1f-8071-817671716db9"
|
|
severity = "high"
|
|
tags = ["Domain: Endpoint", "OS: macOS", "Use Case: Threat Detection", "Tactic: Initial Access", "Tactic: Execution"]
|
|
timestamp_override = "event.ingested"
|
|
type = "eql"
|
|
|
|
query = '''
|
|
process where host.os.type == "macos" and event.type in ("start", "process_started") and
|
|
process.parent.name : ("Google Chrome", "Google Chrome Helper*", "firefox", "Opera", "Safari", "com.apple.WebKit.WebContent", "Microsoft Edge") and
|
|
process.name : ("sh", "bash", "dash", "ksh", "tcsh", "zsh", "curl", "wget", "python*", "perl*", "php*", "osascript", "pwsh") and
|
|
process.command_line != null and
|
|
not process.command_line : "*/Library/Application Support/Microsoft/MAU*/Microsoft AutoUpdate.app/Contents/MacOS/msupdate*" and
|
|
not process.args :
|
|
(
|
|
"hw.model",
|
|
"IOPlatformExpertDevice",
|
|
"/Volumes/Google Chrome/Google Chrome.app/Contents/Frameworks/*/Resources/install.sh",
|
|
"--defaults-torrc",
|
|
"*Chrome.app",
|
|
"Framework.framework/Versions/*/Resources/keystone_promote_preflight.sh",
|
|
"/Users/*/Library/Application Support/Google/Chrome/recovery/*/ChromeRecovery",
|
|
"$DISPLAY",
|
|
"*GIO_LAUNCHED_DESKTOP_FILE_PID=$$*",
|
|
"/opt/homebrew/*",
|
|
"/usr/local/*brew*"
|
|
)
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1203"
|
|
name = "Exploitation for Client Execution"
|
|
reference = "https://attack.mitre.org/techniques/T1203/"
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0002"
|
|
name = "Execution"
|
|
reference = "https://attack.mitre.org/tactics/TA0002/"
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1189"
|
|
name = "Drive-by Compromise"
|
|
reference = "https://attack.mitre.org/techniques/T1189/"
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0001"
|
|
name = "Initial Access"
|
|
reference = "https://attack.mitre.org/tactics/TA0001/"
|
|
|