DARKRADIATION Ransomware Infection

[rule]
description = """
Identifies a file extension used by DARKRADIATION bash ransomware that abuses the openssl utility to encrypt files.
Adversaries may encrypt data on target systems or on large numbers of systems in a network to interrupt availability to
system and network resources.
"""
id = "33309858-3154-47a6-b601-eda2de62557b"
license = "Elastic License v2"
name = "DARKRADIATION Ransomware Infection"
os_list = ["linux", "macos"]
reference = [
    "https://www.trendmicro.com/en_us/research/21/f/bash-ransomware-darkradiation-targets-red-hat--and-debian-based-linux-distributions.html",
]
version = "1.0.29"

query = '''
process where event.type == "start" and event.action == "exec" and
 process.name == "xargs" and process.args == "openssl" and process.args == "enc" and
 /* radiation unicode symbol used by DARKRADIATION ransomware */
 process.command_line like "*.☢*"
'''

min_endpoint_version = "7.15.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0

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

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1486"
name = "Data Encrypted for Impact"
reference = "https://attack.mitre.org/techniques/T1486/"


[threat.tactic]
id = "TA0040"
name = "Impact"
reference = "https://attack.mitre.org/tactics/TA0040/"

[internal]
min_endpoint_version = "7.15.0"