command_and_control_remote_file_copy_desktopimgdownldr.toml

[metadata]
creation_date = "2020/09/03"
maturity = "production"
updated_date = "2021/04/14"

[rule]
author = ["Elastic"]
description = """
Identifies the desktopimgdownldr utility being used to download a remote file. An adversary may use desktopimgdownldr to
download arbitrary files as an alternative to certutil.
"""
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
language = "eql"
license = "Elastic License v2"
name = "Remote File Download via Desktopimgdownldr Utility"
references = ["https://labs.sentinelone.com/living-off-windows-land-a-new-native-file-downldr/"]
risk_score = 47
rule_id = "15c0b7a7-9c34-4869-b25b-fa6518414899"
severity = "medium"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Command and Control"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where event.type in ("start", "process_started") and
  (process.name : "desktopimgdownldr.exe" or process.pe.original_file_name == "desktopimgdownldr.exe") and
  process.args : "/lockscreenurl:http*"
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1105"
reference = "https://attack.mitre.org/techniques/T1105/"
name = "Ingress Tool Transfer"


[rule.threat.tactic]
id = "TA0011"
reference = "https://attack.mitre.org/tactics/TA0011/"
name = "Command and Control"