{
  "family": "gracewire",
  "sample_count": 1,
  "category": "ransomware",
  "description": "<h3>Executive Summary</h3>\nGraceWire is a highly sophisticated, memory-resident Trojan primarily associated with the financially motivated threat group TA505 (the actors behind the Dridex banking trojan and Locky ransomware). GraceWire functions as a persistent backdoor and advanced information stealer, frequently deployed as a secondary payload following an initial compromise via FlawedAmmyy or legitimate remote administration tools abused by the attackers.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nGraceWire is rarely the initial infection vector. It is typically downloaded and executed by a primary loader (like a malicious macro in a spear-phishing document) after TA505 has established a foothold. \n\nOnce executed, GraceWire exhibits advanced, stealthy capabilities:\n<ul>\n<li><strong>Fileless Execution (RunPE):</strong> GraceWire is highly evasive. The loader injects the GraceWire payload directly into the memory space of a legitimate, running Windows process (Process Hollowing / RunPE), ensuring the actual malicious binary never touches the hard drive in an unencrypted state.</li>\n<li><strong>Advanced Data Harvesting:</strong> It possesses extensive capabilities to steal credentials from web browsers, email clients, and FTP software. It also includes keylogging functionality and the ability to capture screenshots of the active desktop.</li>\n<li><strong>Network Proxying and C2:</strong> GraceWire can establish an encrypted tunnel to its Command and Control (C2) server, acting as a proxy. This allows attackers to route their malicious traffic *through* the infected endpoint, masking their true location and bypassing perimeter firewall restrictions.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nA GraceWire detection is a critical security incident indicating a deep compromise by a Tier-1 cybercriminal organization (TA505). Its presence means the attackers have achieved stable, persistent access and are actively harvesting credentials. If left unmitigated, GraceWire infections frequently precede the deployment of enterprise-wide ransomware (such as Clop).\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Behavioral Analysis (EDR):</strong> Because GraceWire operates primarily in memory, static antivirus is often ineffective. Eradication requires EDR solutions capable of detecting process injection and anomalous network proxying behavior.</li>\n<li><strong>Immediate Isolation and Triage:</strong> Isolate the endpoint immediately to cut the C2 connection and halt data exfiltration. Assume the network is actively being targeted for ransomware deployment.</li>\n<li><strong>Total Infrastructure Rebuild:</strong> Due to the sophistication of TA505 and the likelihood of compromised administrative credentials and lateral movement, attempting to \"clean\" the system is insufficient. A complete bare-metal wipe and re-image from a trusted baseline is mandatory, alongside a global password reset.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.GraceWire",
    "Backdoor.GraceWire",
    "Win32/GraceWire",
    "TA505.Payload"
  ],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Gracewire and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Gracewire 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 Gracewire establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Gracewire 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 Gracewire compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Gracewire 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 Trojan.GraceWire employ during execution?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Trojan.GraceWire 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 Trojan.GraceWire, and what is the recommended recovery procedure?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Decryption availability for Trojan.GraceWire 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": [
    "T1055.012",
    "T1056.001",
    "T1090",
    "T1555.003"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-10-15",
  "type": "Trojan / Info Stealer (TA505)",
  "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": "T1055.012",
      "name": "Process Injection: Process Hollowing (RunPE)",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1056.001",
      "name": "Keylogging",
      "tactic": "Credential Access"
    },
    {
      "id": "T1090",
      "name": "Proxy",
      "tactic": "Command and Control"
    },
    {
      "id": "T1555.003",
      "name": "Credentials from Web Browsers",
      "tactic": "Unknown"
    }
  ],
  "containment_steps": [
    "Immediately isolate affected host(s) from the internal network (disconnect physical Ethernet and disable Wi-Fi/Bluetooth) to prevent Gracewire 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 Gracewire 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 Gracewire 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 Gracewire 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 Gracewire.",
    "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 Gracewire eradication is completely verified."
  ],
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows Server 2022",
    "Windows Server 2019"
  ]
}