{
  "family": "freekeylogger",
  "sample_count": 16,
  "category": "spyware",
  "description": "FreeKeylogger (classified across endpoint security platforms as Spyware:Win32/FreeKeylogger, MonitoringTool:Win32/FreeKeylogger, and PUA:Win32/FreeKeylogger) represents a dual-use surveillance spyware family frequently deployed by malicious actors for clandestine credential theft and espionage on Windows hosts. Although ostensibly marketed as parental control or employee productivity monitoring utilities, threat actors weaponize FreeKeylogger by bundling it into trojanized freeware installers or installing it surreptitiously during unauthorized remote access sessions. FreeKeylogger runs entirely in stealth mode without displaying a system tray icon, desktop shortcut, or visible application window. It installs global low-level Windows keyboard hooks via `SetWindowsHookEx` (`WH_KEYBOARD_LL`) to capture every keystroke, including passwords, personal messages, and banking credentials. In addition to keystroke logging, the spyware monitors active application window titles, intercepts clipboard text, captures periodic desktop screenshots, and logs visited web URLs. The harvested data is written into hidden, encrypted local cache files and transmitted automatically via SMTP email, FTP, or HTTP POST to remote attacker-controlled infrastructure.",
  "cta": "Published by the SystemHelpdesk Threat Intelligence Team.",
  "aliases": [
    "Spyware:Win32/FreeKeylogger",
    "MonitoringTool:Win32/FreeKeylogger",
    "PUA:Win32/FreeKeylogger",
    "Free Keylogger Spyware",
    "Spyware.FreeKeylogger"
  ],
  "enrichment_level": "curated_sourced",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Spyware:Win32/FreeKeylogger?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "FreeKeylogger is a surveillance spyware utility that secretly records keystrokes, clipboard data, and screenshots on Windows PCs."
      }
    },
    {
      "@type": "Question",
      "name": "How does FreeKeylogger capture keystrokes invisibly?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "It registers low-level Windows keyboard hooks (WH_KEYBOARD_LL) to intercept keystroke events before applications receive them."
      }
    },
    {
      "@type": "Question",
      "name": "How does FreeKeylogger transmit stolen data to attackers?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "It packages logs into encrypted archives and exfiltrates them via background SMTP email messages, FTP uploads, or HTTP POSTs."
      }
    },
    {
      "@type": "Question",
      "name": "How does FreeKeylogger evade user notice?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "It hides its presence from the taskbar, system tray, and Programs and Features list, operating under hidden background process names."
      }
    },
    {
      "@type": "Question",
      "name": "How can users detect and remove FreeKeylogger?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Run an updated antimalware scan, audit active low-level hook handles using security tools, and check autostart registry entries."
      }
    }
  ],
  "faq_count": 5,
  "mitre_attack": [
    "T1056.001",
    "T1113",
    "T1115",
    "T1082",
    "T1547.001",
    "T1041"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-10-15",
  "mitre_attack_detail": [
    {
      "id": "T1056.001",
      "name": "Input Capture: Keylogging",
      "tactic": "Credential Access"
    },
    {
      "id": "T1543.003",
      "name": "Create or Modify System Process: Windows Service",
      "tactic": "Persistence"
    },
    {
      "id": "T1041",
      "name": "Exfiltration Over C2 Channel",
      "tactic": "Exfiltration"
    },
    {
      "id": "T1562.001",
      "name": "Impair Defenses: Disable or Modify Tools",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1112",
      "name": "Modify Registry",
      "tactic": "Defense Evasion"
    }
  ],
  "containment_steps": [
    "Instantly isolate the endpoint from the network to halt the exfiltration of the captured keystroke logs via email or cloud sync.",
    "Assume all passwords typed on the machine (corporate, personal, financial) are compromised. Initiate mandatory password resets from a known-clean device.",
    "Verify with HR and Legal if the software is an authorized component of an insider threat monitoring program before taking destructive action.",
    "Perform a clean OS rebuild; commercial keyloggers hook deeply into the system, and manual removal often leaves persistent components behind."
  ],
  "what_to_avoid": [
    "Do not allow the user to log into any systems (even to change their password) on the infected machine, as the new password will also be logged.",
    "Avoid assuming the incident is a minor policy violation; the exfiltrated logs may contain highly sensitive corporate IP or regulatory compliance data."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ],
  "attack_stage": [
    "execution",
    "persistence"
  ],
  "ecosystem": [
    "windows_pe"
  ],
  "is_emerging": false,
  "sources": [
    {
      "name": "Microsoft Defender Security Intelligence - Spyware:Win32/FreeKeylogger",
      "url": "https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?Name=Spyware:Win32/FreeKeylogger"
    },
    {
      "name": "Malwarebytes Labs - Spyware.Keylogger Threat Profile",
      "url": "https://www.malwarebytes.com/blog/detections/spyware-keylogger"
    },
    {
      "name": "MITRE ATT&CK - Input Capture: Keylogging (T1056.001)",
      "url": "https://attack.mitre.org/techniques/T1056/001/"
    }
  ],
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows 7"
  ]
}