Execute Invoke-command on Remote Host

Severity: medium
Author: frack113
Source: upstream

Adversaries may use Valid Accounts to interact with remote systems using Windows Remote Management (WinRM). The adversary may then perform actions as the logged-on user.

MITRE ATT&CK coverage

Tactic	Techniques
Lateral Movement	`T1021.006` Remote Services: Windows Remote Management

Event coverage

Provider	Event ID	Title
PowerShell	4104	Creating Scriptblock text (MessageNumber of MessageTotal).

Stages and Predicates

Stage 1: `selection_cmdlet`

ScriptBlockText|contains: ' -ComputerName '
ScriptBlockText|contains: 'invoke-command '

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`ScriptBlockText`	match	`-ComputerName` `invoke-command`

Neighbors

Broader alternatives (more inclusive than this rule)

These rules match a superset of what this rule catches. They cover the same events plus more. Use them if you want wider coverage and can absorb more false positives.

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Potential Dynamic IEX Reconstruction via Environment Variables [elastic] (cross-vendor) (drops 2 filters this rule applies) (first-stage match only; downstream stages may differ)
Dynamic IEX Reconstruction via Method String Access [elastic] (cross-vendor) (drops 2 filters this rule applies) (first-stage match only; downstream stages may differ)
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Potential PowerShell Obfuscation via Reverse Keywords [elastic] (cross-vendor) (drops 2 filters this rule applies) (first-stage match only; downstream stages may differ)
Potential PowerShell Obfuscation via String Concatenation [elastic] (cross-vendor) (drops 2 filters this rule applies) (first-stage match only; downstream stages may differ)
Potential PowerShell Obfuscation via String Reordering [elastic] (cross-vendor) (drops 2 filters this rule applies) (first-stage match only; downstream stages may differ)
Potential PowerShell Obfuscation via Special Character Overuse [elastic] (cross-vendor) (drops 2 filters this rule applies) (first-stage match only; downstream stages may differ)