{
  "family": "wadhrama",
  "sample_count": 1,
  "category": "ransomware",
  "description": "<h3>Executive Summary</h3>\nWadhrama is a sophisticated, highly disruptive variant of ransomware characterized by its use of robust encryption algorithms and its tendency to target specific, high-value file types (such as databases and server configurations). It is designed to extort cryptocurrency from individuals and organizations by holding their critical data hostage.\n\n<h3>Infection Chain and Execution</h3>\nWadhrama is typically distributed via targeted spear-phishing campaigns containing malicious attachments or through the exploitation of vulnerable, internet-facing Remote Desktop Protocol (RDP) servers. \n\nUpon gaining initial access, Wadhrama executes a rapid, automated attack sequence:\n<ul>\n<li><strong>Privilege Escalation:</strong> It attempts to bypass User Account Control (UAC) or exploit local vulnerabilities to gain administrative or `SYSTEM` level privileges.</li>\n<li><strong>Defense Evasion:</strong> Before encrypting files, it actively attempts to terminate anti-malware processes and stops database services (e.g., MSSQL) to ensure database files are unlocked and available for encryption.</li>\n<li><strong>Encryption and Destruction:</strong> Wadhrama utilizes a combination of symmetric and asymmetric encryption (often AES and RSA) to lock files. It simultaneously executes commands (`vssadmin.exe delete shadows /all /quiet`) to destroy local volume shadow copies, preventing easy recovery.</li>\n<li><strong>Extortion:</strong> A ransom note is deposited in affected directories, instructing the victim on how to purchase the decryption key, usually demanding payment in Bitcoin.</li>\n</ul>\n\n<h3>Threat Impact</h3>\nA Wadhrama infection results in a catastrophic denial of access to critical business data. Without secure, offline backups, organizations face massive operational downtime, financial loss, and severe reputational damage. Paying the ransom is discouraged, as it offers no guarantee of data recovery and funds further criminal activity.\n\n<h3>Defense and Resilience Strategies</h3>\n<ul>\n<li><strong>Offline, Immutable Backups:</strong> The only reliable defense against Wadhrama is a robust 3-2-1 backup strategy, ensuring that at least one copy of critical data is stored offline and is immutable (cannot be altered or deleted).</li>\n<li><strong>RDP Security:</strong> Secure all remote access points. RDP must be placed behind a VPN, secured with Multi-Factor Authentication (MFA), and restricted via strict IP whitelisting.</li>\n<li><strong>Behavioral EDR:</strong> Deploy EDR solutions tuned to immediately block processes attempting mass file modifications or the unauthorized deletion of volume shadow copies.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Ransomware.Wadhrama",
    "Win32/Wadhrama",
    "Trojan-Ransom.Wadhrama"
  ],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Wadhrama and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Wadhrama is classified as a Ransomware. 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 Wadhrama establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Wadhrama 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 Wadhrama compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Wadhrama 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 cryptographic algorithms and file targeting techniques does Ransomware.Wadhrama employ during execution?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Ransomware.Wadhrama typically leverages hybrid cryptographic architectures combining symmetric stream or block ciphers (such as AES-256 or ChaCha20) for rapid file encryption with asymmetric algorithms (such as RSA-2048 or Curve25519) to securely protect the session keys. It aggressively targets sensitive file extensions including corporate documents, databases, virtual disks, and backups while systematically executing commands to delete Volume Shadow Copies (vssadmin delete shadows /all /quiet) and disable system recovery options."
      }
    },
    {
      "@type": "Question",
      "name": "Are decryptors available for Ransomware.Wadhrama, and what is the recommended recovery procedure?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Decryption availability for Ransomware.Wadhrama depends on whether security researchers or law enforcement (such as the No More Ransom initiative) have recovered the master private keys or discovered flaws in its key generation routines. Victims should never pay the extortion demand, as payment fuels criminal operations without guaranteeing file restoration. The recommended recovery procedure entails isolating infected hosts, conducting forensic disk imaging, identifying the root access vector, and restoring validated systems from immutable offline backups."
      }
    }
  ],
  "faq_count": 5,
  "mitre_attack": [
    "T1486",
    "T1490",
    "T1078",
    "T1562.001"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-10-15",
  "type": "Ransomware",
  "target_industries": [
    "Healthcare",
    "Critical Infrastructure",
    "Enterprise"
  ],
  "motivation": "Financial Extortion",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ],
  "attack_stage": [
    "defense_evasion",
    "impact"
  ],
  "ecosystem": [
    "windows_pe"
  ],
  "is_emerging": false,
  "mitre_attack_detail": [
    {
      "id": "T1486",
      "name": "Data Encrypted for Impact",
      "tactic": "Impact"
    },
    {
      "id": "T1490",
      "name": "Inhibit System Recovery (Behaviorally blocking the deletion of backups)",
      "tactic": "Impact"
    },
    {
      "id": "T1078",
      "name": "Valid Accounts (The goal of the attack)",
      "tactic": "Initial Access"
    },
    {
      "id": "T1562.001",
      "name": "Impair Defenses: Disable or Modify Tools",
      "tactic": "Defense Evasion"
    }
  ],
  "containment_steps": [
    "Immediately isolate affected host(s) from the internal network (disconnect physical Ethernet and disable Wi-Fi/Bluetooth) to prevent Wadhrama from spreading laterally or encrypting network-attached storage (NAS) and shared SMB volumes.",
    "Preserve volatile system memory (RAM capture) on a representative endpoint before attempting a reboot or power-down, as Wadhrama symmetric encryption keys or uncompiled payload components may still reside in memory.",
    "Audit process execution logs and terminate active scripting interpreters (e.g. PowerShell, CMD, WScript) or commands executing 'vssadmin.exe delete shadows' or 'wbadmin' used by Wadhrama to inhibit recovery.",
    "Investigate the initial compromise vector (such as exposed RDP instances, spearphishing attachments, or vulnerable edge gateways) and enforce an immediate credential reset for all compromised Active Directory accounts.",
    "Restore critical assets and databases exclusively from verified, air-gapped, or immutable offline backups once the Wadhrama binary and related persistence hooks are eradicated."
  ],
  "what_to_avoid": [
    "Do not restart or power cycle infected systems prematurely; doing so destroys volatile RAM encryption keys and may trigger bootloader locking logic embedded in Wadhrama.",
    "Avoid negotiating or paying the extortion demand without prior forensic evaluation and consultation with incident response specialists, as payment does not guarantee data recovery.",
    "Do not connect clean backup drives or external storage to the affected network until Wadhrama eradication is completely verified."
  ],
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows Server 2022",
    "Windows Server 2019"
  ]
}