[rule]
description = """
Detects when the ssh-keygen binary is executed with the -D argument which can be used to load a malicious shared object
into memory.
"""
id = "cc29bf55-8d7f-45df-b8fe-212968c8951c"
license = "Elastic License v2"
name = "Linux Shared Object Load via SSH-Keygen"
os_list = ["linux"]
reference = [
"https://medium.com/@D00MFist/generate-keys-or-generate-dylib-loads-c99ed48f323d",
"https://gtfobins.github.io/gtfobins/ssh-keygen/",
]
version = "1.0.5"
query = '''
process where event.action == "exec" and event.type == "start" and process.name == "ssh-keygen" and
process.args == "-D" and process.args_count >= 3 and not process.args : (
"/lib/*", "/usr/lib/*", "/usr/local/lib/*",
"/lib64/*", "/usr/lib64/*", "/usr/local/lib64/*"
)
'''
min_endpoint_version = "7.15.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1574"
name = "Hijack Execution Flow"
reference = "https://attack.mitre.org/techniques/T1574/"
[threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"
[internal]
min_endpoint_version = "7.15.0"