Sigma rule: Suspicious New-PSDrive to Admin Share

Rule

Title

Suspicious New-PSDrive to Admin Share

Status

test

Level

medium

Author

frack113

Date

2022-08-13

File

rules/windows/powershell/powershell_script/posh_ps_susp_new_psdrive.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Adversaries may use to interact with a remote network share using Server Message Block (SMB). The adversary may then perform actions as the logged-on user.

Log source

product

windows

category

ps_script

definition

Requirements: Script Block Logging must be enabled

Detection

selection:
    ScriptBlockText|contains|all:
        - 'New-PSDrive'
        - '-psprovider '
        - 'filesystem'
        - '-root '
        - '\\\\'
        - '$'
condition: selection

False positives (as the rule lists them)

• Unknown

Tags

• attack.lateral-movement
• attack.t1021.002

MITRE ATT&CK ids this rule names

• T1021.002

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1021.002/T1021.002.md#atomic-test-2---map-admin-share-powershell
• https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/new-psdrive?view=powershell-7.2

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/powershell/powershell_script/posh_ps_susp_new_psdrive.yml