Suspicious Connection to Remote Account (via ps_script)

title: Suspicious Connection to Remote Account (via ps_script)
id: 4a58c5d2-be65-5910-b293-1ecc2a12f275
status: stable
description: This rule detects threat actors with no prior knowledge of legitimate credentials within the system or environment may guess passwords to attempt access to accounts. Without knowledge of the password for an account, an adversary may opt to systematically guess the password using a repetitive or iterative mechanism
references:
    - https://attack.mitre.org/techniques/T1110/001/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1110.001/T1110.001.md#atomic-test-2---brute-force-credentials-of-single-active-directory-domain-user-via-ldap-against-domain-controller-ntlm-or-kerberos
author: Huntrule Team
date: 2026-02-05
tags:
    - attack.credential-access
    - attack.t1110.001
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains:
            - 'System.DirectoryServices.Protocols.LdapDirectoryIdentifier'
            - 'System.Net.NetworkCredential'
            - 'System.DirectoryServices.Protocols.LdapConnection'
    condition: selection
falsepositives:
    - Unknown
level: low