PowerShell Credential Prompt via PromptForCredential

Flags PowerShell scripts that reference "PromptForCredential", indicating credential prompt behavior in Script Block Logging.

FreeReviewedSigma · High · v2

Product: windows
Category: ps_script
Author: John Lambert (idea), Florian Roth (Nextron Systems) (SigmaHQ), DRL 1.1
Published: 2017-04-09
Updated: 2026-07-31

Analysis Detection

ATT&CK techniques

Execution

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule flags PowerShell script content that includes the credential prompt function call PromptForCredential. Adversaries can use credential prompts to capture or solicit user credentials during execution, making it a high-value behavior for credential-access detection. The detection relies on Windows PowerShell script block text telemetry that records the ScriptBlockText content. It matches when the script block text contains the exact substring PromptForCredential.

Reporting behind it

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PowerShell Credential Prompt via PromptForCredential

Pivot detection · T1059.001 · 9 related

Changelog

v2
Candidate ingested via manual entry.2026-07-31
v1
No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

powershell-credential-prompt-usage-script-block-logging-ca8b77a9

title: PowerShell Credential Prompt via PromptForCredential
id: a45b7afc-3500-4124-b5b4-4178f2ad6d72
status: test
description: This rule flags PowerShell script content that includes the credential prompt function call PromptForCredential. Adversaries can use credential prompts to capture or solicit user credentials during execution, making it a high-value behavior for credential-access detection. The detection relies on Windows PowerShell script block text telemetry that records the ScriptBlockText content. It matches when the script block text contains the exact substring PromptForCredential.
references:
  - https://twitter.com/JohnLaTwC/status/850381440629981184
  - https://t.co/ezOTGy1a1G
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/powershell/powershell_script/posh_ps_prompt_credentials.yml
author: John Lambert (idea), Florian Roth (Nextron Systems), Huntrule Team
date: 2017-04-09
modified: 2022-12-25
tags:
  - attack.credential-access
  - attack.execution
  - attack.t1059.001
logsource:
  product: windows
  category: ps_script
  definition: "Requirements: Script Block Logging must be enabled"
detection:
  selection:
    ScriptBlockText|contains: PromptForCredential
  condition: selection
falsepositives:
  - Unknown
level: high
license: DRL-1.1
related:
  - id: ca8b77a9-d499-4095-b793-5d5f330d450e
    type: derived

Convert

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