{
  "family": "powerspritz",
  "sample_count": 1,
  "category": "ransomware",
  "description": "<h3>Executive Summary</h3>\nPowerSpritz is a sophisticated, fileless malware framework that heavily leverages Microsoft PowerShell to compromise Windows environments. Designed for extreme stealth and evasion, PowerSpritz operates almost entirely within the system's volatile memory (RAM), acting as a powerful initial access dropper and backdoor for advanced threat actors.\n\n<h3>Technical Architecture and Fileless Execution</h3>\nPowerSpritz avoids dropping traditional compiled executables (.exe) onto the hard drive, minimizing its footprint and bypassing many legacy antivirus scanners that rely on static file hashing.\n\nThe typical PowerSpritz infection chain involves:\n<ul>\n<li><strong>Initial Access:</strong> Often delivered via weaponized macro documents (e.g., Microsoft Word) or through the exploitation of remote execution vulnerabilities. The initial exploit executes a short, encoded PowerShell stub.</li>\n<li><strong>In-Memory Payload Delivery:</strong> The PowerShell stub connects to a remote command-and-control (C2) server and downloads the primary PowerSpritz script. Crucially, this script is never written to disk; it is executed directly within the memory space of the `powershell.exe` process using the `Invoke-Expression` (IEX) cmdlet.</li>\n<li><strong>Evasion and Persistence:</strong> PowerSpritz utilizes advanced AMSI (Anti-Malware Scan Interface) bypass techniques to blind local security defenses. It establishes fileless persistence by burying encoded PowerShell scripts within Windows Management Instrumentation (WMI) event subscriptions or complex Registry keys.</li>\n</ul>\n\n<h3>Threat Impact</h3>\nPowerSpritz is a Tier-1 threat. Because it provides attackers with an interactive, highly privileged PowerShell session on the compromised host, it serves as a perfect launchpad for credential dumping (via Mimikatz), lateral movement, and the eventual deployment of enterprise-wide ransomware.\n\n<h3>Detection and Remediation Strategies</h3>\n<ul>\n<li><strong>PowerShell Logging:</strong> Standard antivirus is often ineffective against fileless attacks. Enable PowerShell Script Block Logging (Event ID 4104) across the enterprise. This forces Windows to decode and log the actual commands being executed, providing crucial visibility to the SOC.</li>\n<li><strong>AMSI and EDR:</strong> Ensure that advanced EDR solutions are deployed and that AMSI is strictly enforced and monitored for bypass attempts.</li>\n<li><strong>Execution Restrictions:</strong> Implement strict PowerShell execution policies. Restrict the execution of PowerShell scripts to signed, approved administrative scripts only, severely crippling the ability of PowerSpritz to launch.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.PowerSpritz",
    "Fileless.PowerSpritz",
    "PowerShell.Downloader"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1059.001",
    "T1027.005",
    "T1562.001",
    "T1546.003"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-01T16:27:47Z",
  "type": "Trojan",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}