PowerShell runs suspicious base64-encoded commands

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	XDR Agent
ATT&CK Tactic	Execution (TA0002)
ATT&CK Technique	Command and Scripting Interpreter: PowerShell (T1059.001)
Severity	Low

Description

Running PowerShell with a base64-encoded payload in the command line is often used by attackers to evade detection.

Attacker's Goals

Run code to perform actions or download other malicious programs.

Investigative actions

• Check if the initiator process is malicious.
• Check for other operations by the PowerShell instance.

Variations

PowerShell runs rare base64-encoded command via remote causality actor

Synopsis

Field	Value
ATT&CK Tactic	Execution (TA0002)
ATT&CK Technique	Command and Scripting Interpreter: PowerShell (T1059.001)
Severity	Medium

Description

Running PowerShell with a base64-encoded payload in the command line is often used by attackers to evade detection.

Attacker's Goals

Run code to perform actions or download other malicious programs.

Investigative actions

• Check if the initiator process is malicious.
• Check for other operations by the PowerShell instance.

PowerShell runs rare base64-encoded command by windows built-in scripting engine

Synopsis

Field	Value
ATT&CK Tactic	Execution (TA0002)
ATT&CK Technique	Command and Scripting Interpreter: PowerShell (T1059.001)
Severity	High

Description

Running PowerShell with a base64-encoded payload in the command line is often used by attackers to evade detection.

Attacker's Goals

Run code to perform actions or download other malicious programs.

Investigative actions

• Check if the initiator process is malicious.
• Check for other operations by the PowerShell instance.