Suspicious VBScript Execution from Public User Directory (via process_creation)

ATT&CK techniques

Execution

Recon
Resource Dev
Initial Access
Execution
- T1059.005Visual Basic
- T1204.002Malicious File
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects Windows Script Host running a VBScript dropped into the C\Users\Public directory, matching the tax-themed GuLoader chain where a .lnk uses PowerShell to save Fjoua.vbs to Public before execution. The Public folder is an atypical location for legitimate scripts and is chosen to evade per-user monitoring. This stages GuLoader to deliver the Remcos RAT.

Reporting behind it

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Suspicious VBScript Execution from Public User Directory (via process_creation)

Pivot detection · T1059.005 · 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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