1200KM / sigma-rule
Suspicious Connection to Remote Account — Sigma Rule
Sigma rule 1883444f-084b-419b-ac62-e0d0c5b3693f. Suspicious Connection to Remote Account — Sigma Rule. Adversaries 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
Rule metadata and linked tags
Author: frack113. Source status: test; severity: low. Source dates: 2021-12-27 / not supplied.
{
"product": "windows",
"category": "ps_script",
"definition": "Requirements: Script Block Logging must be enabled"
}Pinned original Sigma rule · Detection Rule License 1.1
Source SHA-256: 835eb5fa683a17c60463e60b6848c37d14b6922f2769a16d9b59668ce884a893
Detection logic
Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.
title: Suspicious Connection to Remote Account
id: 1883444f-084b-419b-ac62-e0d0c5b3693f
status: test
description: |
Adversaries 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://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: frack113
date: 2021-12-27
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
False positives
- Unknown
Source references
Connected ecosystem references
Exact source-tagged techniques
Telemetry review
Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.
Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.