Malicious Credential Phishing Dialog via osascript

ATT&CK techniques

Execution → Cred Access

Recon
Resource Dev
Initial Access
Execution
- T1059.002AppleScript
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1555.001Keychain
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects osascript presenting a hidden-answer password dialog impersonating System Preferences, the credential phishing technique used by MacStealer to harvest the user account password. Prompting for the password with hidden input lets the malware capture plaintext credentials under a trusted-looking dialog.

Reporting behind it

Related detections9 linkedT1059.002 — drag to rearrange

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Malicious Sapphire Sleet curl to osascript Chain With mac-cur User-Agent (via process_creation)

Suspicious osascript Spawning Shell Interpreter on macOS

Suspicious AMOS Stealer Fake Password Prompt via osascript (via process_creation)

Suspicious osascript Spawning Shell curl to External Host on macOS (via process_creation)

Suspicious macOS Keychain Credential Dumping via security find-generic-password

Suspicious Credential Archive Staging in tmp via process_creation

Malicious Credential Phishing Dialog via osascript

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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