Suspicious Osascript Muting System Volume via BANSHEE Infostealer

ATT&CK techniques

Execution

Recon
Resource Dev
Initial Access
Execution
- T1059.002AppleScript
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects osascript executing an AppleScript command that mutes the system output volume which is an anti-analysis behavior performed by the BANSHEE macOS infostealer to hide audible feedback during execution. Adversaries silence the host so credential and data theft proceed without alerting the user.

Reporting behind it

Related detections9 linkedT1059.002 — drag to rearrange

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Suspicious AppleScript Execution Spawning a Shell via Osascript

Suspicious osascript Execution of Encoded AppleScript on macOS (via process_creation)

Suspicious Credential Prompt Phishing via osascript (via process_creation)

Malicious ClickFix Stager Piping curl Output to osascript

Suspicious Shell Execution Referencing Mounted DMG Volume via Terminal (macOS)

Suspicious osascript to zsh Executing Hidden Payload via Axios Compromise

Suspicious Osascript Muting System Volume via BANSHEE Infostealer

Pivot detection · T1059.002 · 9 related

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

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