Malicious PowerShell Download from bullethost.cloud Staging Server

ATT&CK techniques

Initial Access → Execution

Recon
Resource Dev
Initial Access
- T1195.002Compromise Software Supply Chain
Execution
- T1059.001PowerShell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects PowerShell reaching out to the attacker-controlled staging host upload.bullethost.cloud to fetch a second stage archive into the user temp directory. This behavior was observed in the MUT-4831 campaign where trojanized npm packages ran a postinstall script that downloaded the Vidar infostealer. Blocking this early denies the actor credential and wallet theft capability.

Reporting behind it

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Malicious PowerShell Download from bullethost.cloud Staging Server

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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