Suspicious Executable Copied from Volume Mount

[rule]
description = """
Detects when an executable file is copied from a hidden directory on a volume mounted disk to the applications
directory. Geacon samples have been observed utilizing this technique as a method for setting up persistence with the
second stage payload prior to establishing persistence via the .zshrc file.
"""
id = "0facb446-7d95-4b27-bd40-490bbec5a95b"
license = "Elastic License v2"
name = "Suspicious Executable Copied from Volume Mount"
os_list = ["macos"]
reference = ["https://github.com/darkr4y/geacon"]
version = "1.0.6"

query = '''
sequence by process.entity_id with maxspan=3s
  [process where event.type == "start" and event.action == "exec" and process.name == "cp" and 
    process.args_count == 3 and process.args in ("cp", "/bin/cp", "/usr/bin/cp") and 
    process.args like~ "/Volumes/*/.*" and process.args like "/Applications/*"] as event0
  [file where event.action == "modification" and process.name == "cp" and file.path like "/Applications/*" and 
    file.Ext.header_bytes like~ ("cffaedfe*", "cafebabe*") and
    stringcontains~(event0.process.command_line, file.name)]
'''

min_endpoint_version = "8.11.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "Effective_process.entity_id"
state = 1

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

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1036"
name = "Masquerading"
reference = "https://attack.mitre.org/techniques/T1036/"
[[threat.technique.subtechnique]]
id = "T1036.005"
name = "Match Legitimate Resource Name or Location"
reference = "https://attack.mitre.org/techniques/T1036/005/"



[threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"

[internal]
min_endpoint_version = "8.11.0"