Detectionhightest

UAC Bypass Using NTFS Reparse Point - File

Detects the pattern of UAC Bypass using NTFS reparse point and wusa.exe DLL hijacking (UACMe 36)

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Launch

Christian Burkard (Nextron Systems)Created Mon Aug 30Updated Sun Oct 097fff6773-2baa-46de-a24a-b6eec1aba2d1windows

Log Source

WindowsFile Event

ProductWindows← raw: windows

CategoryFile Event← raw: file_event

Events for file system activity including creation, modification, and deletion.

Detection Logic

detection:
    selection:
        TargetFilename|startswith: 'C:\Users\'
        TargetFilename|endswith: '\AppData\Local\Temp\api-ms-win-core-kernel32-legacy-l1.DLL'
    condition: selection

False Positives

Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

References

Resolving title…

github.com

MITRE ATT&CK

Tactics

TA0005 · Defense Evasion TA0004 · Privilege Escalation

Sub-techniques

T1548.002 · Bypass User Account Control

Rule Metadata

Rule ID

7fff6773-2baa-46de-a24a-b6eec1aba2d1

Status

test

Level

high

Type

Detection

Created

Mon Aug 30

Modified

Sun Oct 09

Author

Christian Burkard (Nextron Systems)

Path

rules/windows/file/file_event/file_event_win_uac_bypass_ntfs_reparse_point.yml

Raw Tags

attack.defense-evasionattack.privilege-escalationattack.t1548.002

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