Malicious PowerShell Download From Storjshare With UAC Elevation via OXLoader

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
Persistence
Priv Esc
- T1548.002Bypass User Account Control
Defense Evasion
- T1548.002Bypass User Account Control
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects PowerShell downloading a payload from the storjshare distribution service and relaunching it with RunAs to trigger UAC elevation as used by the OXLoader loader delivering CASTLESTEALER in Elastic research. Combining a remote fetch with an elevation prompt indicates the loader staging its next component with administrative rights.

Reporting behind it

Related detections9 linkedT1059.001 — drag to rearrange

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Malicious PowerShell Download From Storjshare With UAC Elevation via OXLoader

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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