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main/Windows Chainsaw/sigma rules/proc_creation_win_susp_ntds.yml
2022-08-08 22:22:39 -05:00

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title: Suspicious Process Patterns NTDS.DIT Exfil
id: 8bc64091-6875-4881-aaf9-7bd25b5dda08
description: Detects suspicious process patterns used in NTDS.DIT exfiltration
status: experimental
author: Florian Roth
references:
- https://www.ired.team/offensive-security/credential-access-and-credential-dumping/ntds.dit-enumeration
- https://www.n00py.io/2022/03/manipulating-user-passwords-without-mimikatz/
- https://pentestlab.blog/tag/ntds-dit/
- https://github.com/samratashok/nishang/blob/master/Gather/Copy-VSS.ps1
- https://github.com/zcgonvh/NTDSDumpEx
- https://github.com/rapid7/metasploit-framework/blob/master/data/post/powershell/NTDSgrab.ps1
date: 2022/03/11
tags:
- attack.credential_access
- attack.t1003.003
logsource:
product: windows
category: process_creation
detection:
selection_tool:
# https://github.com/zcgonvh/NTDSDumpEx
- Image|endswith:
- '\NTDSDump.exe'
- '\NTDSDumpEx.exe'
- CommandLine|contains|all:
# ntdsdumpex.exe -d ntds.dit -o hash.txt -s system.hiv
- 'ntds.dit'
- 'system.hiv'
- CommandLine|contains: 'NTDSgrab.ps1'
selection_oneliner_1:
# powershell "ntdsutil.exe 'ac i ntds' 'ifm' 'create full c:\temp' q q"
CommandLine|contains|all:
- 'ac i ntds'
- 'create full'
selection_onliner_2:
# cmd.exe /c copy z:\windows\ntds\ntds.dit c:\exfil\ntds.dit
CommandLine|contains|all:
- '/c copy '
- '\windows\ntds\ntds.dit'
selection_powershell:
CommandLine|contains|all:
- 'powershell'
- 'ntds.dit'
set1_selection_ntds_dit:
CommandLine|contains: 'ntds.dit'
set1_selection_image_folder:
- ParentImage|contains:
- '\apache'
- '\tomcat'
- '\AppData\'
- '\Temp\'
- '\Public\'
- '\PerfLogs\'
- Image|contains:
- '\apache'
- '\tomcat'
- '\AppData\'
- '\Temp\'
- '\Public\'
- '\PerfLogs\'
condition: 1 of selection* or all of set1*
falsepositives:
- Unknown
level: high