Nasreddine Bencherchali
66 lines
2.5 KiB
YAML
66 lines
2.5 KiB
YAML
title: Potential NT API Stub Patching
|
|
id: b916cba1-b38a-42da-9223-17114d846fd6
|
|
status: experimental
|
|
description: Detects potential NT API stub patching as seen used by the project PatchingAPI
|
|
references:
|
|
- https://github.com/D1rkMtr/UnhookingPatch
|
|
- https://twitter.com/D1rkMtr/status/1611471891193298944?s=20
|
|
author: frack113
|
|
date: 2023/01/07
|
|
modified: 2023/01/20
|
|
tags:
|
|
- attack.defense_evasion
|
|
- attack.t1562.002
|
|
logsource:
|
|
category: process_access
|
|
product: windows
|
|
detection:
|
|
selection:
|
|
GrantedAccess: '0x1FFFFF'
|
|
CallTrace|startswith: 'C:\Windows\SYSTEM32\ntdll.dll+'
|
|
CallTrace|contains: '|UNKNOWN('
|
|
CallTrace|endswith: ')'
|
|
filter_generic:
|
|
SourceImage|startswith:
|
|
- 'C:\Program Files\'
|
|
- 'C:\Program Files (x86)\'
|
|
- 'C:\Windows\System32\'
|
|
- 'C:\Windows\SysWOW64\'
|
|
TargetImage|startswith:
|
|
- 'C:\Program Files\'
|
|
- 'C:\Program Files (x86)\'
|
|
- 'C:\Windows\System32\'
|
|
- 'C:\Windows\SysWOW64\'
|
|
filter_thor:
|
|
SourceImage|startswith: 'C:\Windows\Temp\asgard2-agent\'
|
|
SourceImage|endswith: '\thor\thor64.exe'
|
|
filter_githubdesktop:
|
|
SourceImage|startswith: 'C:\Users\'
|
|
SourceImage|contains: '\AppData\Local\GitHubDesktop\app-'
|
|
SourceImage|endswith:
|
|
- '\GitHubDesktop.exe'
|
|
- '\resources\app\git\usr\bin\sh.exe'
|
|
TargetImage|startswith: 'C:\Users\'
|
|
TargetImage|contains: '\AppData\Local\GitHubDesktop\app-'
|
|
filter_dotnet:
|
|
SourceImage|startswith: 'C:\Windows\Microsoft.NET\Framework\v'
|
|
SourceImage|endswith: '\NGenTask.exe'
|
|
TargetImage: 'C:\Windows\Microsoft.NET\Framework\'
|
|
filter_teams_to_update:
|
|
SourceImage|startswith: 'C:\Users\'
|
|
SourceImage|endswith: '\AppData\Local\Microsoft\Teams\stage\Teams.exe'
|
|
TargetImage|startswith: 'C:\Users\'
|
|
TargetImage|endswith: '\AppData\Local\Microsoft\Teams\Update.exe'
|
|
filter_teams_update_regsvr32:
|
|
SourceImage|startswith: 'C:\Users\'
|
|
SourceImage|endswith: '\AppData\Local\Microsoft\Teams\Update.exe'
|
|
TargetImage: 'C:\WINDOWS\SysWOW64\regsvr32.exe'
|
|
filter_teams_update_to_teams:
|
|
SourceImage|startswith: 'C:\Users\'
|
|
SourceImage|endswith: '\AppData\Local\Microsoft\Teams\Update.exe'
|
|
TargetImage|endswith: '\AppData\Local\Microsoft\Teams\stage\Teams.exe'
|
|
condition: selection and not 1 of filter_*
|
|
falsepositives:
|
|
- Unknown
|
|
level: medium
|