Malicious ClickFix MSI Download and Execution via PowerShell

ATT&CK techniques

Execution

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
- T1204.004Malicious Copy and Paste
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects PowerShell using curl to download an MSI installer to disk, the ClickFix delivery chain used to stage DeerStealer. Victims are socially engineered into pasting a Run-dialog command that fetches and installs a malicious package, so a scripted curl download of an .msi followed by installation is a high-fidelity infection indicator.

Reporting behind it

Related detections9 linkedT1059.001 — drag to rearrange

Obfuscated Paste-and-Run Execution From the Windows Run Dialog (via process_creation)

Suspicious PowerShell Download Cradle via Net.WebClient DownloadFile

Suspicious Script Host Launching PowerShell from Fattura Named JScript File (via process_creation)

Malicious Renamed Python Interpreter svchostc Executing Script (via process_creation)

Suspicious PowerShell Spawned from PyInstaller MEI Extraction Folder (via process_creation)

Suspicious Encoded JScript Execution via WScript (via process_creation)

Suspicious Script Host Spawning PowerShell from Fake Browser Update JS

Malicious ClickFix Clipboard Command Execution via PowerShell

Malicious DYNOWIPER PowerShell Loader Execution (via ps_script)

Malicious ClickFix MSI Download and Execution via PowerShell

Pivot detection · T1059.001 · 9 related

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