defense_evasion_potential_thread_call_stack_spoofing.toml

[rule]
description = """
Detects Windows Memory API calls within a potentially altered call stack in order to conceal the true source of the
call.
"""
id = "0cd206df-f54d-47e8-9276-d6a73bb65f47"
license = "Elastic License v2"
name = "Potential Thread Call Stack Spoofing"
os_list = ["windows"]
version = "1.0.3"

query = '''
any where 
 (		
  (event.category : "api" and 
   process.Ext.api.behaviors : ("proxy_call", "indirect_syscall") and 
   _arraysearch(process.thread.Ext.call_stack, $entry, $entry.symbol_info : ("*kernel32.dll!SetDefaultCommConfigW+0x*", "*kernel32.dll!SortGetHandle*")) and 
   process.thread.Ext.call_stack_summary : 
                         ("ntdll.dll|kernelbase.dll|kernel32.dll|ntdll.dll", 
                          "ntdll.dll|kernel32.dll|ntdll.dll", 
                          "ntdll.dll|kernel32.dll|Unknown", 
                          "ntdll.dll|kernel32.dll|*|Unknown", 
                          "ntdll.dll|kernel32.dll|*|kernel32.dll|ntdll.dll")) or 

   (event.category : "library" and _arraysearch(process.thread.Ext.call_stack, $entry, $entry.symbol_info :  ("*kernel32.dll!SetDefaultCommConfigW+0x*", "*kernel32.dll!SortGetHandle*")) and 
    process.thread.Ext.call_stack_summary : ("ntdll.dll|kernelbase.dll|kernel32.dll|ntdll.dll", "ntdll.dll|kernel32.dll|ntdll.dll", "ntdll.dll|kernel32.dll|*|kernel32.dll|ntdll.dll")) or 

   (event.category : "api" and process.Ext.api.behaviors : "proxy_call" and 
    process.thread.Ext.call_stack_summary : "ntdll.dll|kernelbase.dll|ntdll.dll|kernel32.dll|ntdll.dll" and 
     _arraysearch(process.thread.Ext.call_stack, $entry, $entry.symbol_info : "*ntdll.dll!RtlDeregisterWaitEx*") and 
     process.thread.Ext.call_stack_final_user_module.name : "ntdll.dll")
  )
'''

min_endpoint_version = "8.10.0"
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0

[[optional_actions]]
action = "rollback"
field = "process.entity_id"
state = 0

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1036"
name = "Masquerading"
reference = "https://attack.mitre.org/techniques/T1036/"

[[threat.technique]]
id = "T1055"
name = "Process Injection"
reference = "https://attack.mitre.org/techniques/T1055/"


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

[internal]
min_endpoint_version = "8.10.0"