User TCC DB Access by Unsigned or Untrusted Process

[rule]
description = """
Detects the attempt to access or open the users TCC database by an unsigned or untrusted binary. This activity may
indicate the presence of a malicious payload attempting to bypass TCC or gain awareness of system permissions in place.
"""
id = "a9bec1de-bc5f-4e0f-a80e-569f5b920ef6"
license = "Elastic License v2"
name = "User TCC DB Access by Unsigned or Untrusted Process"
os_list = ["macos"]
reference = [
    "https://www.sentinelone.com/blog/session-cookies-keychains-ssh-keys-and-more-7-kinds-of-data-malware-steals-from-macos-users/",
]
version = "1.0.13"

query = '''
file where event.action == "open" and process.executable != null and 
 file.path like~ "/Users/*/Library/Application Support/com.apple.TCC/TCC.db" and
 (process.code_signature.trusted == false or process.code_signature.exists == false) and
 not Effective_process.executable in ("/Applications/Vorta.app/Contents/MacOS/vorta-darwin",
                                      "/Applications/CleanMyMac X.app/Contents/MacOS/CleanMyMac X",
                                      "/Applications/CleanMyMac X.app/Contents/Library/LoginItems/CleanMyMac X HealthMonitor.app/Contents/MacOS/CleanMyMac X HealthMonitor") and
 not process.code_signature.signing_id like~ "rg-*"
'''

min_endpoint_version = "8.10.2"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1106"
name = "Native API"
reference = "https://attack.mitre.org/techniques/T1106/"


[threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1069"
name = "Permission Groups Discovery"
reference = "https://attack.mitre.org/techniques/T1069/"

[[threat.technique]]
id = "T1082"
name = "System Information Discovery"
reference = "https://attack.mitre.org/techniques/T1082/"


[threat.tactic]
id = "TA0007"
name = "Discovery"
reference = "https://attack.mitre.org/tactics/TA0007/"

[internal]
min_endpoint_version = "8.10.2"