{
  "family": "rasoon",
  "sample_count": 1,
  "category": "trojan",
  "description": "<h3>Executive Summary</h3>\nRasoon is a specialized Information Stealer (Info-Stealer) and Trojan designed to covertly infiltrate Windows systems and extract sensitive authentication data. It primarily focuses on harvesting credentials saved within web browsers, email clients, and FTP software, transmitting this stolen data back to an attacker-controlled command-and-control (C2) server for monetization or further exploitation.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nRasoon is typically distributed via malicious email attachments (often masquerading as invoices or shipping documents) or bundled within cracked software available on untrustworthy software portals.\n\nUpon execution, Rasoon initiates a rapid, localized search for high-value credentials:\n<ul>\n<li><strong>Browser and Email Harvesting:</strong> The malware actively scans the registry and local AppData folders to extract saved passwords, autofill data, and session cookies from major web browsers (Chrome, Firefox, Internet Explorer). It also targets email clients (Outlook, Thunderbird).</li>\n<li><strong>FTP/Webmaster Targeting:</strong> Rasoon frequently hunts for configuration files and saved passwords associated with popular FTP clients (like FileZilla or WinSCP). Stolen FTP credentials allow the attacker to deface websites or host further malware payloads.</li>\n<li><strong>Data Exfiltration:</strong> Once the data is harvested, Rasoon encrypts the stolen information and transmits it to an attacker-controlled server via HTTP POST requests, completing its execution quickly to evade prolonged detection.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nA Rasoon infection poses a severe risk to an organization's internal and external infrastructure. The theft of session cookies can bypass Multi-Factor Authentication (MFA), allowing attackers immediate access to corporate web applications (like O365 or Google Workspace).\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>MFA Token Revocation:</strong> Assume session cookies were stolen. Force an immediate sign-out of all active sessions for critical web applications to invalidate the stolen tokens.</li>\n<li><strong>Local Password Reset:</strong> All user credentials saved in the affected endpoint's web browsers, email clients, and FTP software must be considered compromised and reset from a clean device.</li>\n<li><strong>Endpoint Eradication:</strong> The malware itself is typically not heavily obfuscated and can often be removed by a reputable EDR or enterprise antivirus solution. Ensure a full system scan is completed to verify eradication.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.Rasoon",
    "PWS.Rasoon",
    "TrojanSpy.Rasoon"
  ],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Rasoon and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Rasoon is classified as a Trojan. Documented across security telemetry, it is engineered to execute unauthorized operations, establish persistent footholds on target endpoints, and facilitate malicious campaigns targeting enterprise and individual environments."
      }
    },
    {
      "@type": "Question",
      "name": "How does Rasoon establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Rasoon typically establishes persistence through registry run keys, scheduled tasks, or service installations, while evading signature-based antivirus solutions through code obfuscation, memory injection, or anti-analysis sandbox checks."
      }
    },
    {
      "@type": "Question",
      "name": "What are the essential incident response steps for mitigating a Rasoon compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Rasoon should immediately isolate affected endpoints from the network, perform memory triage to capture volatile forensic artifacts, audit registry and startup persistence mechanisms, revoke exposed user credentials, and restore systems from verified, clean backups."
      }
    },
    {
      "@type": "Question",
      "name": "What secondary payloads and staging behaviors are commonly associated with Trojan.Rasoon?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Trojan.Rasoon frequently operates as a loader or dropper designed to establish a foothold before downloading and executing secondary high-impact malware payloads. Depending on the threat actor's objectives, these dropped modules can range from ransomware and banking injects to modular infostealers and remote management backdoors."
      }
    },
    {
      "@type": "Question",
      "name": "How can security operations teams effectively detect and hunt for Trojan.Rasoon across enterprise endpoints?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Defenders should hunt for Trojan.Rasoon by deploying behavioral endpoint detection and response (EDR) rules that monitor suspicious process spawning (such as cmd.exe or powershell.exe spawned from office documents or temporary directories), anomalous outbound network connections from non-browser binaries, and unauthorized modifications to Windows Run keys and scheduled task registries."
      }
    }
  ],
  "faq_count": 5,
  "mitre_attack": [
    "T1555.003",
    "T1539",
    "T1056.001",
    "T1048"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-10-15",
  "type": "Information Stealer",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ],
  "attack_stage": [
    "execution",
    "persistence"
  ],
  "ecosystem": [
    "windows_pe"
  ],
  "is_emerging": false,
  "mitre_attack_detail": [
    {
      "id": "T1555.003",
      "name": "Credentials from Web Browsers",
      "tactic": "Unknown"
    },
    {
      "id": "T1539",
      "name": "Steal Web Session Cookie (Abusing active authenticated sessions to perform social media fraud)",
      "tactic": "Credential Access"
    },
    {
      "id": "T1056.001",
      "name": "Keylogging",
      "tactic": "Credential Access"
    },
    {
      "id": "T1048",
      "name": "Exfiltration Over Alternative Protocol",
      "tactic": "Exfiltration"
    }
  ],
  "containment_steps": [
    "Sever network connectivity for the flagged endpoint to terminate persistent command-and-control (C2) communication channels and stop Rasoon from retrieving secondary stage payloads.",
    "Capture process memory triage to detect and terminate malicious threads injected by Rasoon into legitimate system processes such as explorer.exe or svchost.exe.",
    "Audit Windows Registry Run keys (HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run) and Task Scheduler entries to locate and purge Rasoon persistence hooks.",
    "Deploy updated enterprise EDR detection signatures and conduct an out-of-band endpoint scan to isolate dropped binaries and staged payloads.",
    "Rotate all credentials, domain user passwords, and session cookies active on the system during the Rasoon execution timeframe."
  ],
  "what_to_avoid": [
    "Do not assume the incident is resolved simply because an antivirus tool removed the initial Rasoon dropper; always verify that secondary payloads and persistence hooks have been eradicated.",
    "Avoid logging in with Domain Admin or privileged credentials on a machine suspected of running Rasoon until memory triage is complete.",
    "Do not delay host isolation; automated lateral movement and credential dumping can occur within minutes of initial execution."
  ],
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows 7"
  ]
}