Sigma rule: PowerShell Script With File Upload Capabilities

Rule

Title

PowerShell Script With File Upload Capabilities

Status

test

Level

low

Author

frack113

Date

2022-01-07

Modified

2025-07-18

File

rules/windows/powershell/powershell_script/posh_ps_script_with_upload_capabilities.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects PowerShell scripts leveraging the "Invoke-WebRequest" cmdlet to send data via either "PUT" or "POST" method.

Log source

product

windows

category

ps_script

definition

bade5735-5ab0-4aa7-a642-a11be0e40872

Detection

selection_cmdlet:
    ScriptBlockText|contains:
        - 'Invoke-RestMethod'
        - 'Invoke-WebRequest'
        - 'irm '
        - 'iwr '
selection_flag:
    ScriptBlockText|contains:
        - '-Method "POST"'
        - '-Method "PUT"'
        - '-Method POST'
        - '-Method PUT'
        - "-Method 'POST'"
        - "-Method 'PUT'"
condition: all of selection_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.exfiltration
• attack.t1020

MITRE ATT&CK ids this rule names

• T1020

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1020/T1020.md
• https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html
• https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/invoke-webrequest?view=powershell-7.4

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_script_with_upload_capabilities.yml