LoFP LoFP / some legitimate system administration or development tasks may use these tools for managing symbolic links or file locks. filter alerts for authorized maintenance and testing activities.

Techniques

Sample rules

Description

Detects the execution of tools from the symboliclink-testing-tools toolkit. This toolkit is often used for exploiting Windows symbolic link, junction, and oplock vulnerabilities to achieve local privilege escalation from a standard user to SYSTEM. Symbolic link attacks against Windows exploit a class of logical vulnerability where a SYSTEM or administrator-level process performs a file operation on a path that a low-privileged attacker can redirect using a combination of NTFS junctions, object manager symbolic links, and opportunistic locks (oplocks). By chaining these primitives a standard user can redirect a privileged file write, delete, or read to an arbitrary path, effectively turning a narrow file operation vulnerability into arbitrary write or code execution as SYSTEM.

Detection logic


| tstats `security_content_summariesonly`
  count min(_time) as firstTime
        max(_time) as lastTime

from datamodel=Endpoint.Processes where

Processes.process_name IN (
    "BaitAndSwitch.exe",
    "CreateDosDeviceSymlink.exe",
    "CreateMountPoint.exe",
    "CreateNtfsSymlink.exe",
    "CreateObjectDirectory.exe",
    "CreateRegSymlink.exe",
    "DeleteMountPoint.exe",
    "DumpReparsePoint.exe",
    "NativeSymlink.exe",
    "SetOpLock.exe"
)

by Processes.process Processes.vendor_product Processes.user_id Processes.process_hash
   Processes.parent_process_name Processes.parent_process_exec Processes.action
   Processes.dest Processes.process_current_directory Processes.process_path
   Processes.process_integrity_level Processes.original_file_name Processes.parent_process
   Processes.parent_process_path Processes.parent_process_guid Processes.parent_process_id
   Processes.process_guid Processes.process_id Processes.user Processes.process_name


| `drop_dm_object_name(Processes)`

| `security_content_ctime(firstTime)`

| `security_content_ctime(lastTime)`

| `windows_symboliclink_testing_tools_utility_execution_filter`