behavior/rules/macos/collection_suspicious_image_creation_via_screencapture.toml

[rule]
description = """
Detects when the ScreenCapture binary executes and creates an image in a suspicious location like tmp or the shared
directory. Malware has used the ScreenCapture binary to collect images of victim systems and exfiltrate them via C2.
"""
id = "0701ab8c-9abc-41e1-8af7-2d937778e73f"
license = "Elastic License v2"
name = "Suspicious Image Creation via ScreenCapture"
os_list = ["macos"]
version = "1.0.2"

query = '''
sequence by process.entity_id with maxspan=10s
[process where event.type == "start" and event.action == "exec" and process.name == "screencapture" and
  not process.parent.executable like "/System/Library/CoreServices/SystemUIServer.app/Contents/MacOS/SystemUIServer" and
  not process.Ext.effective_parent.executable like "/System/Library/CoreServices/SystemUIServer.app/Contents/MacOS/SystemUIServer"]
[file where event.action == "modification" and file.path like ("/Users/Shared/*", "/tmp/*", "/private/tmp/*")]
'''

min_endpoint_version = "8.11.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.parent.entity_id"
state = 0

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1059"
name = "Command and Scripting Interpreter"
reference = "https://attack.mitre.org/techniques/T1059/"
[[threat.technique.subtechnique]]
id = "T1059.004"
name = "Unix Shell"
reference = "https://attack.mitre.org/techniques/T1059/004/"



[threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1113"
name = "Screen Capture"
reference = "https://attack.mitre.org/techniques/T1113/"


[threat.tactic]
id = "TA0009"
name = "Collection"
reference = "https://attack.mitre.org/tactics/TA0009/"

[internal]
min_endpoint_version = "8.11.0"