Suspicious ClickFix cv.bat Staging in Temp via PowerShell (via process_creation)

ATT&CK techniques

Execution → C2

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1105Ingress Tool Transfer
Exfiltration
Impact

What it detects

This rule detects PowerShell referencing the cv.bat helper script staged in a temporary directory, an intermediate step in the ClickFix delivery chain that subsequently retrieves an MSI-packaged DeerStealer payload. The batch file bridges the initial pasted command and the final installer. Detecting this staging step interrupts the infostealer infection before installation completes.

Reporting behind it

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Suspicious ClickFix cv.bat Staging in Temp via PowerShell (via process_creation)

Pivot detection · T1059.001 · 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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