[rule]
description = """
Detects attempts to load a networking library from a potentially altered call stack in order to conceal the true source
of the call.
"""
id = "9b87e433-5f77-40cc-9b91-25c9c2020515"
license = "Elastic License v2"
name = "Suspicious Network Library Load"
os_list = ["windows"]
reference = ["https://www.elastic.co/security-labs/doubling-down-etw-callstacks"]
version = "1.0.2"
query = '''
library where
dll.name : ("winhttp.dll", "ws2_32.dll") and
/* ROP gadget in early loaded modules kernel32 or kernelbase.dll */
process.thread.Ext.call_stack_summary like ("*|wininet.dll|kernelbase.dll*", "*|wininet.dll|kernel32.dll*") and
_arraysearch(process.thread.Ext.call_stack, $entry, $entry.symbol_info: "C:\\Windows\\System32\\wininet.dll!InternetOpen*")
'''
min_endpoint_version = "8.10.0"
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0
tree = true
[[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.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"
[internal]
min_endpoint_version = "8.10.0"