Suspicious wscript Execution of MicrosoftEdgeUpdate VBS Masquerade

ATT&CK techniques

Execution

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

What it detects

This rule detects the Windows Script Host running a script named MicrosoftEdgeUpdate.vbs. The Cloud Atlas group used a VBS masquerading as a Microsoft Edge updater executed through wscript as described by Kaspersky. Genuine Edge updates do not run a VBScript by this name so execution through the script host indicates masquerading and malicious script execution.

Reporting behind it

Related detections9 linkedT1059.005 — drag to rearrange

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Suspicious AutoIt3 Execution With Compiled Script Argument via Process Creation

Suspicious VBScript Persistence in CurrentVersion Run Key

Suspicious VBScript Code Stored in CurrentVersion Registry Value

Suspicious VBScript Payload Stored in CurrentVersion Registry Value (via registry_set)

Suspicious rundll32 or mshta Proxy Execution of VBScript

Suspicious Office Application Spawning Script Interpreter

Suspicious wscript Execution of MicrosoftEdgeUpdate VBS Masquerade

Pivot detection · T1059.005 · 9 related

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