Shared Object File Creation and Immediate Preload

[rule]
description = """
Identifies the creation of a new shared object (.so) file followed by a process execution that preloads the newly
created shared object using either the LD_PRELOAD or LD_LIBRARY_PATH environment variables. Attackers may leverage this
technique to inject malicious code into legitimate processes, thereby enabling stealthy persistence and unauthorized
access to the compromised system.
"""
id = "b6585a25-db0e-4911-b860-3f117b1db60f"
license = "Elastic License v2"
name = "Shared Object File Creation and Immediate Preload"
os_list = ["linux"]
reference = [
    "https://www.uptycs.com/blog/cyber_espionage_in_india_decoding_apt_36_new_linux_malware",
    "https://attack.mitre.org/techniques/T1574/006/",
]
version = "1.0.24"

query = '''
sequence with maxspan=5s
  [file where event.action == "creation" and 
   file.path : ("/tmp/*", "/lib/*", "/usr/lib/*", "/var/tmp/*", "/dev/shm/*", "/dev/run/*", "/proc/*") and
   file.extension == "so"] as event0
  [process where event.type == "start" and event.action == "exec" and startswith~(process.env_vars, event0.file.path)]
'''

min_endpoint_version = "8.6.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 1

[[actions]]
action = "kill_process"
field = "process.parent.entity_id"
state = 1

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1574"
name = "Hijack Execution Flow"
reference = "https://attack.mitre.org/techniques/T1574/"
[[threat.technique.subtechnique]]
id = "T1574.006"
name = "Dynamic Linker Hijacking"
reference = "https://attack.mitre.org/techniques/T1574/006/"



[threat.tactic]
id = "TA0003"
name = "Persistence"
reference = "https://attack.mitre.org/tactics/TA0003/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1574"
name = "Hijack Execution Flow"
reference = "https://attack.mitre.org/techniques/T1574/"
[[threat.technique.subtechnique]]
id = "T1574.006"
name = "Dynamic Linker Hijacking"
reference = "https://attack.mitre.org/techniques/T1574/006/"



[threat.tactic]
id = "TA0004"
name = "Privilege Escalation"
reference = "https://attack.mitre.org/tactics/TA0004/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1574"
name = "Hijack Execution Flow"
reference = "https://attack.mitre.org/techniques/T1574/"
[[threat.technique.subtechnique]]
id = "T1574.006"
name = "Dynamic Linker Hijacking"
reference = "https://attack.mitre.org/techniques/T1574/006/"



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

[internal]
min_endpoint_version = "8.6.0"