{
  "family": "infinitetear",
  "sample_count": 1,
  "category": "trojan",
  "description": "<h3>Executive Summary</h3>\nInfiniteTear is a highly sophisticated, stealthy Backdoor and Remote Access Trojan (RAT) historically associated with Advanced Persistent Threat (APT) groups engaging in targeted espionage. It is designed to provide threat actors with long-term, covert access to high-value networks, enabling the exfiltration of sensitive intellectual property, government secrets, or corporate strategies while remaining undetected by standard security controls.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nInfiniteTear is not distributed broadly. It is deployed selectively, typically following a successful spear-phishing campaign that delivers a primary loader, or deployed laterally by an attacker who has already breached the network perimeter using stolen credentials or zero-day exploits.\n\nOnce deployed, InfiniteTear exhibits advanced capabilities:\n<ul>\n<li><strong>Deep Stealth and Evasion:</strong> The malware often operates entirely in memory (fileless execution) to evade disk-based anti-virus scans. It employs complex API hooking and process hollowing to inject itself into legitimate system processes (like `svchost.exe`), masking its execution.</li>\n<li><strong>Custom Encrypted C2:</strong> InfiniteTear utilizes highly customized, encrypted protocols for Command and Control (C2) communication. It often blends its traffic with legitimate protocols (like HTTPS or DNS) and utilizes domain generation algorithms (DGAs) or hardcoded, compromised infrastructure to make detection difficult.</li>\n<li><strong>Advanced Espionage Toolset:</strong> The backdoor provides a comprehensive suite of espionage tools, allowing operators to execute arbitrary commands, harvest credentials from LSASS memory, capture screens, log keystrokes, and silently compress and exfiltrate specific files or databases.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nThe detection of InfiniteTear on a network is a critical, \"break-glass\" security incident. It indicates a successful, targeted breach by a highly capable adversary (often state-sponsored or highly organized cybercriminals). The primary concern is not system destruction, but the silent, long-term hemorrhaging of critical data.\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Forensic Triage and Containment:</strong> Do not immediately wipe the machine. Isolate the endpoint from the internet, but keep it powered on to allow Incident Response teams to capture volatile memory (RAM) to analyze the memory-resident components and identify the C2 infrastructure.</li>\n<li><strong>Enterprise-Wide Threat Hunt:</strong> The presence of InfiniteTear on one endpoint guarantees lateral movement has occurred. A comprehensive enterprise-wide threat hunt must be initiated to identify all compromised assets, stolen credentials, and secondary backdoors.</li>\n<li><strong>Complete Architecture Review:</strong> Remediation requires a full rebuild of the compromised endpoints from clean baselines, a complete reset of the Active Directory environment (including the KRBTGT account), and a fundamental review of network segmentation and access controls.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Backdoor.InfiniteTear",
    "APT.InfiniteTear",
    "Trojan.Tear"
  ],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Infinitetear and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Infinitetear 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 Infinitetear establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Infinitetear 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 Infinitetear compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Infinitetear 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 Backdoor.InfiniteTear?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Backdoor.InfiniteTear 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 Backdoor.InfiniteTear across enterprise endpoints?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Defenders should hunt for Backdoor.InfiniteTear 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": [
    "T1059.003",
    "T1055",
    "T1071.001",
    "T1003.001",
    "T1048"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-10-15",
  "type": "APT / Backdoor",
  "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": "T1059.003",
      "name": "Command and Scripting Interpreter: Windows Command Shell",
      "tactic": "Execution"
    },
    {
      "id": "T1055",
      "name": "Process Injection",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1071.001",
      "name": "Application Layer Protocol: Web Protocols (C2 Communication)",
      "tactic": "Command and Control"
    },
    {
      "id": "T1003.001",
      "name": "OS Credential Dumping: LSASS Memory (Behaviorally blocking access to credential stores)",
      "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 Infinitetear from retrieving secondary stage payloads.",
    "Capture process memory triage to detect and terminate malicious threads injected by Infinitetear 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 Infinitetear 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 Infinitetear execution timeframe."
  ],
  "what_to_avoid": [
    "Do not assume the incident is resolved simply because an antivirus tool removed the initial Infinitetear 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 Infinitetear 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"
  ]
}